WO2021163953A1 - Optical coupling system, optical module and optical communication device - Google Patents

Abstract

An optical coupling system (10), comprising an optical main body (11) and a light conversion element (16); the optical main body (11) is provided with a bidirectional communication port (14), a receiving port (12), an output port (13) and a mounting groove (15); the mounting groove (15) is provided with a mounting surface (15a), and the mounting surface (15a) is provided with a groove (17); the light conversion element (16) is located in the mounting groove (17), and a connection surface (16a) of the light conversion element (16) is connected to the mounting surface (15a) around the groove (17), and forms a hollow area together with the groove (17); the bidirectional communication port (14) is used for outputting a first optical signal which is emitted from the receiving port (12) into the optical main body (11) and passes through the light conversion element (16) and the hollow area, and is used for inputting a second optical signal into the optical main body (11), wherein the second optical signal passes through the hollow area and is emitted to the light conversion element (16) and then is outputted by the output port (13); the wavelength of the first optical signal is different from that of the second optical signal. The optical coupling system (10) is used in the field of optical communication technology, and prevents bubbles in an optical glue from affecting the transmittance and reflectivity of the light conversion element (16). Further disclosed are an optical module containing the optical coupling system (10) above and an optical communication device containing the optical module.

Description

光学耦合***、光模块和光通信设备Optical coupling system, optical module and optical communication equipment 技术领域Technical field

本申请涉及光通信技术领域，尤其涉及一种光学耦合***、光模块和光通信设备。This application relates to the field of optical communication technology, and in particular to an optical coupling system, an optical module, and an optical communication device.

背景技术Background technique

垂直腔表面发射激光器(Vertical Cavity Surface Emitting Laser，简称为VCSEL)因具有可高速调制、易于实现高密度封装以及易于实现与光纤耦合等优点，广泛应用于光模块中。基于VCSEL的光模块，一般采用板上芯片(Chip On Board，简称为COB)封装技术进行封装，例如利用光学耦合***对VCSEL进行封装。Vertical Cavity Surface Emitting Laser (VCSEL) is widely used in optical modules because of its advantages such as high-speed modulation, high-density packaging, and easy coupling with optical fibers. Optical modules based on VCSELs are generally packaged using chip-on-board (COB) packaging technology, for example, using an optical coupling system to package VCSELs.

在相关技术中，如图1所示，光学耦合***10包括光学主体11和滤波片16，其中，光学主体11具有底部边界面11a和第一侧部边界面11b，底部边界面11a设有接收透镜12和输出透镜13，第一侧部边界面11b设有光纤透镜14。光学主体11还设有全内反射面11d和位于全内反射面11d和第一侧部边界面11b之间的安装槽15，安装槽15中靠近第一侧部边界面11b的侧面为安装面15a，该安装面15a相对底部边界面11a和第一侧部边界面11b倾斜，滤波片16通过光学胶粘结在安装面15a上。滤波片16包括两个光学面：第一光学面16a和第二光学面16b，第一光学面16a和第二光学面16b上分别设有具有不同光学性能的功能膜。当第一光信号(图1中波长为λ1的光信号)从底部边界面11a的下方射至接收透镜12后，经过接收透镜12准直照射在滤波片16的第一光学面16a上后发生反射，再经光纤透镜14准直输出到光学主体11外；当第二光信号(波长为λ2的光信号)从第一侧部边界面11b的外部射至光纤透镜14后，该第二光信号经光纤透镜14准直后照射在滤波片16上，并穿过滤波片16照射在全内反射面11d上全反射，全反射后的第二光信号经输出透镜13准直射出光学主体11外。In the related art, as shown in FIG. 1, the optical coupling system 10 includes an optical body 11 and a filter 16, wherein the optical body 11 has a bottom boundary surface 11a and a first side boundary surface 11b, and the bottom boundary surface 11a is provided with a receiving For the lens 12 and the output lens 13, a fiber lens 14 is provided on the first side boundary surface 11b. The optical body 11 is also provided with a total internal reflection surface 11d and a mounting groove 15 between the total internal reflection surface 11d and the first side boundary surface 11b. The side surface of the mounting groove 15 close to the first side boundary surface 11b is the mounting surface 15a, the mounting surface 15a is inclined relative to the bottom boundary surface 11a and the first side boundary surface 11b, and the filter 16 is bonded to the mounting surface 15a by optical glue. The filter 16 includes two optical surfaces: a first optical surface 16a and a second optical surface 16b. The first optical surface 16a and the second optical surface 16b are respectively provided with functional films with different optical properties. When the first optical signal (the optical signal with wavelength λ1 in FIG. 1) is emitted from below the bottom boundary surface 11a to the receiving lens 12, it is collimated and irradiated on the first optical surface 16a of the filter 16 through the receiving lens 12. Reflected and collimated by the fiber lens 14 to be output to the outside of the optical body 11. When the second optical signal (optical signal with a wavelength of λ2) is emitted from the outside of the first side boundary surface 11b to the fiber lens 14, the second light The signal is collimated by the optical fiber lens 14 and then irradiated on the filter 16, and passed through the filter 16, and irradiated on the total internal reflection surface 11d. Total reflection, and the second optical signal after total reflection is collimated out of the optical body 11 by the output lens 13 outside.

利用上述光学耦合***10，可以实现双向光通信。不过，由于滤波片16和安装面15a之间通过光学胶粘结，而在涂布光学胶时，光学胶中可能会形成有气泡，气泡会影响滤波片16的透过率和反射率，进而降低光学耦合***10的性能。With the above-mentioned optical coupling system 10, two-way optical communication can be realized. However, since the filter 16 and the mounting surface 15a are bonded by optical glue, when the optical glue is applied, air bubbles may be formed in the optical glue. The air bubbles will affect the transmittance and reflectivity of the filter 16, thereby The performance of the optical coupling system 10 is reduced.

发明内容Summary of the invention

本申请实施例提供了一种光学耦合***、光模块和光通信设备，用于避免光学胶中的气泡影响滤波片的透光率和反射率，提升光学耦合***的性能。The embodiments of the present application provide an optical coupling system, an optical module, and an optical communication device, which are used to prevent bubbles in the optical glue from affecting the transmittance and reflectance of the filter, and improve the performance of the optical coupling system.

第一方面，本申请实施例提供了一种光学耦合***，其包括光学主体和光转换元件，其中，所述光学主体设有安装槽，安装槽具有安装面，安装面设有凹槽；所述光转换元件位于安装槽内，光转换元件的连接面与凹槽周围的安装面连接，该连接面与凹槽围成镂空区；光学主体还设有接收口、输出口和双向通信端口，其中双向通信端 口用于输出：自接收***入光学主体内，并穿过光转换元件和镂空区的第一光信号；以及用于向光学主体内输入第二光信号，第二光信号穿过镂空区并射至光转换元件后由输出口输出；且第二光信号的波长和第一光信号的波长不同。In the first aspect, an embodiment of the present application provides an optical coupling system, which includes an optical body and a light conversion element, wherein the optical body is provided with a mounting groove, the mounting groove has a mounting surface, and the mounting surface is provided with a groove; The light conversion element is located in the installation groove, and the connection surface of the light conversion element is connected with the installation surface around the groove, and the connection surface and the groove form a hollow area; the optical body is also provided with a receiving port, an output port and a two-way communication port, wherein The two-way communication port is used to output: the first optical signal that enters the optical body from the receiving port and passes through the light conversion element and the hollow area; and is used to input the second optical signal into the optical body, and the second optical signal passes through The hollow area is emitted to the light conversion element and then output from the output port; and the wavelength of the second optical signal is different from the wavelength of the first optical signal.

具有上述结构的光学耦合***中，由于在安装槽的安装面上设有凹入光学主体内的凹槽，凹槽与位于凹槽的槽口区域内的光转换元件的部分连接面围成镂空区，镂空区位于光转换元件和双向通信端口之间的光信号传播路径上，由于在安装面设有凹槽，使得位于凹槽的槽口区域内的部分连接面上不需要设置光学胶，因此，位于镂空区内的连接面上不会出现由光学胶引起的气泡，从而使得第一光信号和第二光信号可以基本无损地穿过镂空区并射至光转换元件，保证了光转换元件如滤波片的透过率和反射率，进而提升了光学耦合***的性能。In the optical coupling system with the above-mentioned structure, since a groove recessed into the optical body is provided on the installation surface of the installation groove, the groove and a part of the connecting surface of the light conversion element located in the notch area of the groove are enclosed in a hollow The hollow area is located on the optical signal propagation path between the optical conversion element and the bidirectional communication port. Since the mounting surface is provided with a groove, the part of the connection surface in the notch area of the groove does not need to be provided with optical glue. Therefore, no bubbles caused by the optical glue will appear on the connecting surface in the hollow area, so that the first light signal and the second light signal can pass through the hollow area and shoot to the light conversion element without any damage, ensuring light conversion The transmittance and reflectivity of components such as filters, thereby improving the performance of the optical coupling system.

在一种可能的实现方式中，所述光学主体具有相对设置的第一侧部边界面和第二侧部边界面，以及位于所述第一侧部边界面和所述第二侧部边界面之间的底部边界面；所述接收口和所述输出口均位于所述底部边界面上，所述双向通信端口位于所述第一侧部边界面上。如此设计，一方面可以实现双向光信号在光学主体内的传递，另一方面由于接收口和输出口设置在底部边界面上，缩小光学主体的体积，有利于光学耦合***的小型化。In a possible implementation, the optical body has a first side boundary surface and a second side boundary surface that are disposed oppositely, and are located on the first side boundary surface and the second side boundary surface. The receiving port and the output port are located on the bottom boundary surface, and the two-way communication port is located on the first side boundary surface. With this design, on the one hand, the transmission of bidirectional optical signals in the optical body can be realized. On the other hand, since the receiving port and the output port are arranged on the bottom boundary surface, the volume of the optical body is reduced, which is beneficial to the miniaturization of the optical coupling system.

在一种可能的实现方式中，所述光学主体设有全内反射面，所述全内反射面用于将自所述接收***入到所述光学主体内的第一光信号全反射至所述光转换元件；所述安装槽和所述光转换元件位于所述全内反射面和所述第一侧部边界面之间。In a possible implementation manner, the optical body is provided with a total internal reflection surface, and the total internal reflection surface is used to totally reflect the first optical signal injected into the optical body from the receiving port to The light conversion element; the mounting groove and the light conversion element are located between the total internal reflection surface and the first side boundary surface.

在一种可能的实现方式中，所述第二侧部边界面与所述底部边界面之间的夹角为锐角，所述第二侧部边界面形成所述全内反射面；或，所述第二侧部边界面连接有与所述底部边界面呈锐角的斜面，所述斜面形成所述全内反射面。如此设计，利用光学主体的第二侧部边界面形成全内反射面，或者利用与第二侧部边界面连接的斜面形成全内反射面，可以降低光学主体的结构复杂性，降低光学主体的制备难度和成本；此外，还可以缩小光学主体的体积。In a possible implementation, the angle between the second side boundary surface and the bottom boundary surface is an acute angle, and the second side boundary surface forms the total internal reflection surface; or, so The second side boundary surface is connected with an inclined surface that forms an acute angle with the bottom boundary surface, and the inclined surface forms the total internal reflection surface. With this design, the second side boundary surface of the optical body is used to form the total internal reflection surface, or the inclined surface connected with the second side boundary surface is used to form the total internal reflection surface, which can reduce the structural complexity of the optical body and reduce the optical body Preparation difficulty and cost; in addition, the volume of the optical body can be reduced.

在另一种可能的实现方式中，所述光学主体设有反光槽，所述反光槽位于所述第二侧部边界面和所述安装槽之间，所述反光槽邻近所述安装槽的内侧面形成所述全内反射面。如此设计，利用反光槽中的一个内侧面作为全内反射面，可以实现第一光信号的在光学主体内的变向，同时还可以缩小光学主体的体积。In another possible implementation manner, the optical body is provided with a light reflecting groove, the light reflecting groove is located between the second side boundary surface and the mounting groove, and the light reflecting groove is adjacent to the mounting groove. The inner side surface forms the total internal reflection surface. With such a design, using an inner side surface of the reflective groove as a total internal reflection surface can realize the redirection of the first optical signal in the optical body, and at the same time, the volume of the optical body can be reduced.

在一种可能的实现方式中，所述双向通信端口包括形成在所述第一侧部边界面上的光纤透镜，所述光纤透镜用于准直经过所述双向通信端口的所述第一光信号和所述第二光信号。具有这种结构的光学耦合***，光纤透镜由部分第一侧部边界面形成，有利于光学耦合***的小型化。In a possible implementation manner, the bidirectional communication port includes a fiber lens formed on the first side boundary surface, and the fiber lens is used to collimate the first light passing through the bidirectional communication port. Signal and the second optical signal. In the optical coupling system with this structure, the fiber lens is formed by a part of the first side boundary surface, which is beneficial to the miniaturization of the optical coupling system.

在一种可能的实现方式中，所述接收口包括形成在所述底部边界面上的接收透镜，所述接收透镜用于准直经过所述接收口的所述第一光信号；所述输出口包括形成在所述底部边界面上的输出透镜，所述输出透镜用于准直经过所述输出口的所述第二光信号。具有这种结构的光学耦合***，接收口和输出口分别由部分底部边界面形成，有利于光学耦合***的小型化。In a possible implementation, the receiving port includes a receiving lens formed on the bottom boundary surface, and the receiving lens is used to collimate the first optical signal passing through the receiving port; the output The port includes an output lens formed on the bottom boundary surface, and the output lens is used to collimate the second optical signal passing through the output port. In the optical coupling system with this structure, the receiving port and the output port are respectively formed by part of the bottom boundary surface, which is beneficial to the miniaturization of the optical coupling system.

在一种可能的实现方式中，所述安装面相对所述第一侧部边界面和所述底部边界 面倾斜。In a possible implementation manner, the mounting surface is inclined with respect to the first side boundary surface and the bottom boundary surface.

在一种可能的实现方式中，所述连接面与位于所述凹槽周围的所述安装面之间通过结构胶粘结。In a possible implementation manner, the connecting surface and the mounting surface located around the groove are bonded by structural glue.

在一种可能的实现方式中，所述结构胶为UV固化型、热固化型或UV和热双固化型的环氧胶。In a possible implementation manner, the structural adhesive is an epoxy adhesive of UV curing type, thermal curing type or UV and thermal dual curing type.

在一种可能的实现方式中，所述光转换元件包括：具有相对的第一光学面和第二光学面的滤波片，设于所述第一光学面上的第一功能膜，以及设于所述第二光学面上的第二功能膜，所述第一功能膜用于透过所述第一光信号以及反射所述第二光信号；所述第二功能膜用于透过至少部分所述第一光信号。In a possible implementation, the light conversion element includes: a filter having a first optical surface and a second optical surface opposed to each other, a first functional film provided on the first optical surface, and The second functional film on the second optical surface, the first functional film is used to transmit the first optical signal and to reflect the second optical signal; the second functional film is used to transmit at least part of the The first optical signal.

在一种可能的实现方式中，所述光学主体还设有监测端口和第三光学面，所述监测端口位于所述接收口和所述输出口之间；所述第三光学面用于使由所述全内反射面全反射至所述第三光学面的第一光信号分为第一部分和第二部分，所述第一部分穿过所述第三光学面射至所述光转换元件；所述第二部分被所述第三光学面反射至所述全内反射面，并经所述全内反射面再次反射后射至所述监测端口输出。In a possible implementation manner, the optical body is further provided with a monitoring port and a third optical surface, the monitoring port is located between the receiving port and the output port; the third optical surface is used to make The first optical signal totally reflected from the total internal reflection surface to the third optical surface is divided into a first part and a second part, and the first part passes through the third optical surface and is emitted to the light conversion element; The second part is reflected by the third optical surface to the total internal reflection surface, is reflected again by the total internal reflection surface, and then is emitted to the monitoring port for output.

在一种可能的实现方式中，所述第三光学面的法线与射至所述第三光学面的所述第一光信号的中心线呈第一设定角度，以使从所述第三光学面反射回所述全内反射面上的第一光信号在所述全内反射面上的反射点，与从所述接收***至所述全内反射面的第一光信号在所述全内反射面上的反射点错开。In a possible implementation, the normal line of the third optical surface and the center line of the first optical signal incident on the third optical surface are at a first set angle, so that the The reflection point of the first optical signal reflected by the three optical surfaces back to the total internal reflection surface on the total internal reflection surface is at the same point as the first optical signal emitted from the receiving port to the total internal reflection surface. The reflection points on the total internal reflection surface are staggered.

在一种可能的实现方式中，所述第一设定角度为1度-15度。In a possible implementation manner, the first set angle is 1 degree to 15 degrees.

在一种可能的实现方式中，所述监测端口包括形成在所述底部边界面上的监测透镜，所述监测透镜用于准直经过所述监测端口的所述第一光信号。In a possible implementation manner, the monitoring port includes a monitoring lens formed on the bottom boundary surface, and the monitoring lens is used to collimate the first optical signal passing through the monitoring port.

在一种可能的实现方式中，所述凹槽包括第四光学面和第五光学面，所述第四光学面面、所述第五光学面面和所述凹槽的槽口所对应的连接面围成截面形状为三角形的所述镂空区，所述第四光学面用于透过所述第一光信号和所述第二光信号，所述第五光学面用于透过至少部分所述第二光信号。In a possible implementation manner, the groove includes a fourth optical surface and a fifth optical surface, and the fourth optical surface, the fifth optical surface, and the notch of the groove correspond to The connecting surface encloses the hollow area with a triangular cross-sectional shape, the fourth optical surface is used to transmit the first optical signal and the second optical signal, and the fifth optical surface is used to transmit at least part of the The second optical signal.

在一种可能的实现方式中，所述第五光学面的法线与射至所述第五光学面的所述第二光信号的中心线呈第二设定角度，以使从所述第五光学面反射回所述光转换元件上的第二光信号在所述光转换元件上的反射点，与从所述镂空区射至所述光转换元件的第二光信号在所述光转换元件上的反射点错开。In a possible implementation manner, the normal line of the fifth optical surface and the center line of the second optical signal incident on the fifth optical surface are at a second set angle, so that from the first Five optical surfaces reflect back to the reflection point of the second light signal on the light conversion element on the reflection point of the light conversion element, and the second light signal emitted from the hollow area to the light conversion element in the light conversion The reflection points on the components are staggered.

在一种可能的实现方式中，所述第二设定角度为1度-15度。In a possible implementation manner, the second set angle is 1 degree to 15 degrees.

第二方面，本申请实施例还提供了一种光模块，其包括：基板、驱动单元、发射单元和接收单元，以及上述第一方面所述的光学耦合***；其中，驱动单元、发射单元和接收单元设于基板上，所述驱动单元与所述发射单元之间通过信号线连接，用于控制所述发射单元开启或关闭；所述发射单元与所述光学耦合***的接收口相对，用于向所述接收口发射第一光信号；所述接收单元与所述光学耦合***的输出口相对，用于接收从所述输出***出的所述第二光信号，所述第二光信号的波长与所述第一光信号的波长不同。In a second aspect, an embodiment of the present application also provides an optical module, which includes: a substrate, a driving unit, a transmitting unit, and a receiving unit, and the optical coupling system described in the first aspect; wherein the driving unit, the transmitting unit, and the The receiving unit is arranged on the substrate, and the driving unit and the transmitting unit are connected by a signal line to control the opening or closing of the transmitting unit; the transmitting unit is opposite to the receiving port of the optical coupling system, and To transmit a first optical signal to the receiving port; the receiving unit is opposite to the output port of the optical coupling system, and is used to receive the second optical signal emitted from the output port, the second optical signal The wavelength of is different from the wavelength of the first optical signal.

具有上述结构的光模块中，由于在光学耦合***的安装槽的安装面上设有凹入光学主体内的凹槽，凹槽与位于凹槽的槽口区域内的光转换元件的部分连接面围成镂空 区，镂空区位于光转换元件和双向通信端口之间的光信号传播路径上；由于安装槽的安装面设有凹槽，使得位于凹槽的槽口区域内的部分连接面上不需要设置光学胶，因此，位于镂空区内的连接面上不会出现由光学胶引起的气泡，从而使得第一光信号和第二光信号可以基本无损地穿过镂空区并到达光转换元件，保证了光转换元件如滤波片的透过率和反射率，进而提升了光学耦合***的性能。In the optical module having the above structure, since the mounting surface of the mounting groove of the optical coupling system is provided with a groove recessed into the optical body, the groove is connected to a part of the light conversion element located in the notch area of the groove. Surrounded by a hollow area, the hollow area is located on the optical signal propagation path between the optical conversion element and the two-way communication port; because the mounting surface of the mounting groove is provided with a groove, part of the connection surface located in the notch area of the groove is not Optical glue needs to be provided. Therefore, air bubbles caused by optical glue will not appear on the connecting surface in the hollow area, so that the first optical signal and the second optical signal can pass through the hollow area and reach the light conversion element without loss. The transmittance and reflectivity of the light conversion element such as the filter are ensured, thereby improving the performance of the optical coupling system.

在一种可能的实现方式中，所述光模块还包括与所述光学耦合***的双向通信端口连接的光传输线路，所述光传输线路用于接收从所述光学耦合***射出的第一光信号，以及用于向所述光学耦合***发射第二光信号。In a possible implementation, the optical module further includes an optical transmission line connected to the bidirectional communication port of the optical coupling system, and the optical transmission line is used to receive the first light emitted from the optical coupling system. Signal, and for transmitting a second optical signal to the optical coupling system.

在一种可能的实现方式中，所述光传输线路为光纤，所述驱动单元为驱动电路，所述发射单元为垂直腔表面发射激光器，所述接收单元为光敏二极管。In a possible implementation manner, the optical transmission line is an optical fiber, the driving unit is a driving circuit, the emitting unit is a vertical cavity surface emitting laser, and the receiving unit is a photodiode.

在一种可能的实现方式中，所述光模块还包括设于所述基板上且位于所述发射单元和所述接收单元之间的监测单元，所述监测单元与所述光学耦合***的监测端口相对，用于接收从所述监测端***出的部分所述第一光信号。In a possible implementation manner, the optical module further includes a monitoring unit provided on the substrate and located between the transmitting unit and the receiving unit, and the monitoring unit is connected to the optical coupling system. The ports are opposite, and are used to receive part of the first optical signal emitted from the monitoring port.

在一种可能的实现方式中，所述监测单元为监测光敏件。In a possible implementation manner, the monitoring unit is a monitoring photosensitive member.

第三方面，本申请实施例还提供了一种光通信设备，包括上述第二方面所述的光模块。由于光通信设备包括上述第二方面所述的光模块，因此光通信设备也具有与光模块相同的优点，具体可参见上述描述，在此不再赘述。In a third aspect, an embodiment of the present application also provides an optical communication device, including the optical module described in the second aspect. Since the optical communication device includes the optical module described in the above second aspect, the optical communication device also has the same advantages as the optical module. For details, please refer to the above description, which will not be repeated here.

附图说明Description of the drawings

图1为相关技术中光学耦合***的剖视图；Figure 1 is a cross-sectional view of an optical coupling system in the related art;

图2为本申请实施例提供的一种光模块的剖视图；2 is a cross-sectional view of an optical module provided by an embodiment of the application;

图3为图2中光学耦合***的剖视图；Figure 3 is a cross-sectional view of the optical coupling system in Figure 2;

图4为图3中光学主体的剖视图；4 is a cross-sectional view of the optical body in FIG. 3;

图5为本申请实施例提供的一种光学主体和滤波片未组装前的立体图；FIG. 5 is a perspective view of an optical body and a filter before being assembled according to an embodiment of the application;

图6为本申请实施例提供的光学主体和滤波片组装后的立体图；Fig. 6 is a perspective view of the assembled optical body and filter provided by an embodiment of the application;

图7为本申请实施例提供的另一种光学主体的剖视图；FIG. 7 is a cross-sectional view of another optical body provided by an embodiment of the application;

图8为本申请实施例提供的又一种光学主体的剖视图；FIG. 8 is a cross-sectional view of another optical body provided by an embodiment of the application;

图9为本申请实施例提供的另一种光模块的剖视图；FIG. 9 is a cross-sectional view of another optical module provided by an embodiment of the application;

图10为图9中光学耦合***的剖视图；FIG. 10 is a cross-sectional view of the optical coupling system in FIG. 9;

图11为图10中光学主体的剖视图；Figure 11 is a cross-sectional view of the optical body in Figure 10;

图12为本申请实施例提供的另一种光模块的剖视图。FIG. 12 is a cross-sectional view of another optical module provided by an embodiment of the application.

具体实施方式Detailed ways

在可实现双向光通信的光学耦合***中，滤波片和安装面之间通过光学胶粘结，而光学胶中可能存在气泡，当光信号经过气泡时，气泡会影响滤波片的透过率和反射率，进而降低光学耦合***的性能。In an optical coupling system that can realize two-way optical communication, the filter and the mounting surface are bonded by optical glue, and there may be bubbles in the optical glue. When the light signal passes through the bubbles, the bubbles will affect the transmittance and transmittance of the filter. Reflectivity, which in turn reduces the performance of the optical coupling system.

为了减轻或避免光学胶中的气泡对滤波片的透过率和反射率的影响，提升光学耦合***的性能，本申请实施例提供的光学耦合***、光模块和光通信设备中，对光学耦合***中用于安装滤波片的安装面进行了挖空，形成了槽口位于安装面上的凹槽， 滤波片与槽口周围的安装面连接。由于安装面上位于槽口的区域被挖空，因此滤波片上对应槽口的区域不需要涂布光学胶，从而不会产生气泡，因此，当光信号经过该凹槽内的空间至滤波片时，滤波片的透过率和反射率不受影响，提升了光学耦合***的性能。In order to reduce or avoid the influence of bubbles in the optical glue on the transmittance and reflectance of the filter, and improve the performance of the optical coupling system, the optical coupling system, optical module, and optical communication device provided in the embodiments of the present application have a pair of optical coupling system The mounting surface used to install the filter is hollowed out to form a groove with a notch on the mounting surface, and the filter is connected to the mounting surface around the notch. Since the area of the notch on the mounting surface is hollowed out, the area corresponding to the notch on the filter does not need to be coated with optical glue, so no air bubbles are generated. Therefore, when the optical signal passes through the space in the groove to the filter , The transmittance and reflectivity of the filter are not affected, which improves the performance of the optical coupling system.

为了使本申请实施例的上述目的、特征和优点能够更加明显易懂，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其它实施例，均属于本申请保护的范围。In order to make the above objectives, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of this application.

本申请实施例提供的光模块包括基板、驱动单元、发射单元、接收单元、光传输线路和光学耦合***，其中，驱动单元、发射单元和接收单元三者设置于基板上，光学耦合***封装驱动单元、发射单元和接收单元，且驱动单元通过信号线与发射单元连接，用于控制发射单元的开启和关闭，实现第一光信号的发射或停止发射。光学耦合***用于接收发射单元发射的第一光信号，以及光传输线路如光纤发射的第二光信号，实现第一光信号和第二光信号分别沿相反的两个方向传输，即光学耦合***可实现双向光通信。The optical module provided by the embodiments of the present application includes a substrate, a driving unit, a transmitting unit, a receiving unit, an optical transmission line, and an optical coupling system. Among them, the driving unit, the transmitting unit and the receiving unit are arranged on the substrate, and the optical coupling system is packaged and driven. The unit, the transmitting unit and the receiving unit, and the driving unit is connected with the transmitting unit through a signal line, and is used to control the opening and closing of the transmitting unit to realize the emission or stop of the emission of the first optical signal. The optical coupling system is used to receive the first optical signal emitted by the transmitting unit and the second optical signal emitted by an optical transmission line such as an optical fiber to realize the transmission of the first optical signal and the second optical signal in two opposite directions respectively, that is, optical coupling The system can realize two-way optical communication.

光学耦合***通常包括光学主体和光转换元件，光学主体设有双向通信端口、接收口、输出口以及用于安装光转换元件的安装槽，双向通信端口用于输出自接收***入光学主体内，并穿过光转换元件的第一光信号，以及用于向光学主体内输入第二光信号，第二光信号射至光转换元件后由输出口输出。The optical coupling system usually includes an optical main body and a light conversion element. The optical main body is provided with a two-way communication port, a receiving port, an output port, and a mounting groove for installing the optical conversion element. The two-way communication port is used to output from the receiving port and enter the optical main body. The first light signal passing through the light conversion element is used to input the second light signal into the optical main body, and the second light signal is emitted to the light conversion element and output from the output port.

在上述光模块中，基板包括但不限于电路板，驱动单元包括但不限于驱动电路或驱动芯片，发射单元包括但不限于垂直腔表面发射激光器(英文全称：Vertical Cavity Surface Emitting Laser，简称为VCSEL)，接收单元包括但不限于光敏二极管；光转换元件包括但不限于滤波片，光学主体包括但不限于光学组件；双向通信端口、接收口和输出口包括但不限于透镜，光传输线路包括但不限于光纤。下面为了描述方便，以光转换元件为滤波片，光传输线路为光纤，发射单元为VCSEL，接收单元为光敏二极管，驱动单元为驱动电路，双向通信端口、接收口和输出口均采用透镜为例进行描述。In the above optical module, the substrate includes but is not limited to a circuit board, the driving unit includes but is not limited to a driving circuit or a driving chip, and the emitting unit includes but not limited to a vertical cavity surface emitting laser (full English name: Vertical Cavity Surface Emitting Laser, abbreviated as VCSEL) ), the receiving unit includes but is not limited to photodiodes; the light conversion element includes but is not limited to filters, the optical body includes but is not limited to optical components; the two-way communication port, the receiving port and the output port include but are not limited to lenses, and the optical transmission line includes but is not limited to Not limited to optical fiber. For the convenience of description, the light conversion element is used as a filter, the optical transmission line is an optical fiber, the transmitting unit is a VCSEL, the receiving unit is a photodiode, the driving unit is a driving circuit, and the two-way communication port, receiving port and output port are all using lenses as examples. Describe.

场景一scene one

图2为本申请实施例提供的一种光模块的剖视图。如图2所示，本申请实施例提供的光模块包括基板20、VCSEL21、光敏二极管22、光纤23、驱动电路24和光学耦合***10，其中，VCSEL21、光敏二极管22和驱动电路24设于基板20上，且位于基板20的同一侧；驱动电路24可通过信号线与VCSEL21信号连接，用于控制VCSEL21发射第一光信号或停止发射第一光信号(图2中波长为λ1的光信号)；光纤23用于接收经光学耦合***的第一光信号，以及用于向光学耦合***10输入第二光信号(图2中波长为λ2的光信号)，且至少部分第二光信号被光敏二极管22接收。需要说明的是，第一光信号的波长λ1和第二光信号的波长λ2不同。FIG. 2 is a cross-sectional view of an optical module provided by an embodiment of the application. As shown in FIG. 2, the optical module provided by the embodiment of the present application includes a substrate 20, a VCSEL 21, a photodiode 22, an optical fiber 23, a driving circuit 24, and an optical coupling system 10. The VCSEL 21, the photodiode 22, and the driving circuit 24 are provided on the substrate. 20, and located on the same side of the substrate 20; the drive circuit 24 can be connected to the VCSEL21 signal through a signal line, and used to control the VCSEL21 to emit the first optical signal or stop emitting the first optical signal (the optical signal with wavelength λ1 in Figure 2) The optical fiber 23 is used to receive the first optical signal through the optical coupling system, and is used to input the second optical signal (the optical signal with a wavelength of λ2 in Figure 2) to the optical coupling system 10, and at least part of the second optical signal is photosensitive The diode 22 receives. It should be noted that the wavelength λ1 of the first optical signal and the wavelength λ2 of the second optical signal are different.

图3为图2中光学耦合***的剖视图，图4为图3中光学主体的剖视图。如图3和图4所示，光学耦合***10包括光学主体11和滤波片16，其中，光学主体11具 有相对设置的第一侧部边界面11b和第二侧部边界面11c，以及位于第一侧部边界面11b和第二侧部边界面11c之间的底部边界面11a，底部边界面11a分别与第一侧部边界面11b和第二侧部边界面11c相连，且底部边界面11a分别与第一侧部边界面11b和第二侧部边界面11c垂直或近似垂直，如此设计，有利于实现第一光信号和第二光信号的90度或近似90度的变向。底部边界面11a上形成有接收透镜12和输出透镜13，接收透镜12与基板20上的VCSEL21相对，用于接收VCSEL21发出的第一光信号，并对第一光信号进行准直；输出透镜13与基板20上的光敏二极管(英文全称：Photo Diode，简称为PD)22相对，用于将射至输出透镜13的第二光信号输出给光敏二极管22，且第二光信号经过输出透镜13后可以准直射向光敏二极管22；第一侧部边界面11b上形成有光纤透镜14，光纤透镜14与光纤23相对，用于对透过光纤透镜14的第一光信号和第二光信号进行准直。3 is a cross-sectional view of the optical coupling system in FIG. 2, and FIG. 4 is a cross-sectional view of the optical body in FIG. 3. As shown in FIGS. 3 and 4, the optical coupling system 10 includes an optical body 11 and a filter 16, wherein the optical body 11 has a first side boundary surface 11b and a second side boundary surface 11c disposed opposite to each other, and a second side boundary surface 11c. The bottom boundary surface 11a between the one side boundary surface 11b and the second side boundary surface 11c, the bottom boundary surface 11a is connected to the first side boundary surface 11b and the second side boundary surface 11c, and the bottom boundary surface 11a They are perpendicular or approximately perpendicular to the first side boundary surface 11b and the second side boundary surface 11c, respectively. Such a design is beneficial to realize the 90-degree or approximately 90-degree change of the first optical signal and the second optical signal. A receiving lens 12 and an output lens 13 are formed on the bottom boundary surface 11a. The receiving lens 12 is opposite to the VCSEL 21 on the substrate 20, and is used to receive the first light signal from the VCSEL 21 and collimate the first light signal; the output lens 13 Opposite to the photodiode (Photo Diode, PD for short) 22 on the substrate 20, it is used to output the second light signal emitted to the output lens 13 to the photodiode 22, and the second light signal passes through the output lens 13 It can be collimated to the photodiode 22; a fiber lens 14 is formed on the first side boundary surface 11b, and the fiber lens 14 is opposite to the optical fiber 23, and is used to collimate the first optical signal and the second optical signal passing through the fiber lens 14 straight.

光学主体11为透光体，波长为λ1的第一光信号和波长为λ2的第二光信号可以在光学主体11内传播。光学主体11的材料可以为耐高温的聚合物，例如聚醚酰亚胺(英文名称：Polyetherimide，简称为PEI)，采用耐高温的聚合物，使得光学耦合***10可以在较高的环境温度或工作温度下正常使用，提高光学耦合***10的可靠性。The optical body 11 is a light-transmitting body, and the first optical signal with the wavelength λ1 and the second optical signal with the wavelength λ2 can propagate in the optical body 11. The material of the optical body 11 can be a high-temperature resistant polymer, such as polyetherimide (English name: Polyetherimide, referred to as PEI). The high-temperature resistant polymer is used so that the optical coupling system 10 can operate at a higher ambient temperature or Normal use at working temperature improves the reliability of the optical coupling system 10.

接收透镜12、输出透镜13和光纤透镜14可以与光学主体11一体成型，例如，利用注塑成型的方式一体成型出光学主体11和接收透镜12、输出透镜13和光纤透镜14，且接收透镜12和输出透镜13不凸出于底部边界面11a，光纤透镜14不凸出于第一侧部边界面11b，如此设计，一方面可以简化光学耦合***10制作工艺，另一方面可以不增加光学主体11的体积，有利于光学耦合***和光模块的小型化。The receiving lens 12, the output lens 13 and the fiber lens 14 can be integrally formed with the optical body 11. For example, the optical body 11 and the receiving lens 12, the output lens 13 and the fiber lens 14 are integrally formed by injection molding, and the receiving lens 12 and The output lens 13 does not protrude from the bottom boundary surface 11a, and the fiber lens 14 does not protrude from the first side boundary surface 11b. This design can simplify the manufacturing process of the optical coupling system 10 on the one hand, and eliminate the need for the optical body 11 on the other hand. The volume is conducive to the miniaturization of the optical coupling system and the optical module.

可以理解的是，接收透镜12、输出透镜13和光纤透镜14也可以与光学主体1分体成型，即先分别形成接收透镜12、输出透镜13、光纤透镜14和光学主体11，然后将接收透镜12、输出透镜13、光纤透镜14固定在光学主体11上，例如粘贴固定或支架固定。It is understandable that the receiving lens 12, the output lens 13, and the fiber lens 14 can also be formed separately from the optical body 1, that is, the receiving lens 12, the output lens 13, the fiber lens 14 and the optical body 11 are formed first, and then the receiving lens 12. The output lens 13 and the fiber lens 14 are fixed on the optical body 11, for example, glued fixation or bracket fixation.

在第一侧部边界面11b和第二侧部边界面11c之间，光学主体11还设有安装槽15和反光槽18，其中，反光槽18靠近第二侧部边界面11c，安装槽15靠近第一侧部边界面11b，或者说，以图4所示的光学主体为例，从左至右依次为第二侧部边界面11c、反光槽18、安装槽15和第二侧部边界面11b。反光槽18靠近第一侧部边界面11b的一内侧面(图4中反光槽18的右内侧面)为全内反射面(英文全称：Total Internal Reflection，简称为TIR)11d，全内反射面11d相对底部边界面11a倾斜，用于将由接收透镜12射向全内反射面11d的第一光信号全反射至滤波片16。Between the first side boundary surface 11b and the second side boundary surface 11c, the optical body 11 is further provided with a mounting groove 15 and a light reflecting groove 18, wherein the light reflecting groove 18 is close to the second side boundary surface 11c, and the mounting groove 15 Close to the first side boundary surface 11b, or, taking the optical body shown in FIG. 4 as an example, from left to right are the second side boundary surface 11c, the reflective groove 18, the mounting groove 15 and the second side edge. Interface 11b. An inner side of the reflective groove 18 close to the first side boundary surface 11b (the right inner side of the reflective groove 18 in FIG. 4) is a total internal reflection surface (full English name: Total Internal Reflection, TIR for short) 11d, a total internal reflection surface 11d is inclined with respect to the bottom boundary surface 11a, and is used to totally reflect the first optical signal emitted from the receiving lens 12 to the total internal reflection surface 11d to the filter 16.

安装槽15位于全内反射面11d和第一侧部边界面11b之间，安装槽15包括安装面15a和支撑面15e，安装面15a相对第一侧部边界面11b和底部边界面11a倾斜，支撑面15e与安装面15a连接，两者之间的夹角可以近似90度。滤波片16安装在安装面15a上，由于安装面15a相对底部边界面11a倾斜，因此，滤波片16也相对底部边界面11a倾斜。滤波片16指向底部边界面11a的侧面与支撑面15e相抵，支撑面15e用于与安装面15a配合，共同支撑滤波片16，提高滤波片16在安装槽15内的安装稳定性。The mounting groove 15 is located between the total internal reflection surface 11d and the first side boundary surface 11b. The mounting groove 15 includes a mounting surface 15a and a supporting surface 15e. The mounting surface 15a is inclined with respect to the first side boundary surface 11b and the bottom boundary surface 11a, The supporting surface 15e is connected to the mounting surface 15a, and the included angle between the two may be approximately 90 degrees. The filter 16 is mounted on the mounting surface 15a. Since the mounting surface 15a is inclined with respect to the bottom boundary surface 11a, the filter 16 is also inclined with respect to the bottom boundary surface 11a. The side surface of the filter 16 directed toward the bottom boundary surface 11a is opposed to the supporting surface 15e. The supporting surface 15e is used to cooperate with the mounting surface 15a to jointly support the filter 16 and improve the installation stability of the filter 16 in the mounting groove 15.

安装面15a上设有凹槽17，凹槽17位于光纤透镜14和滤波片16之间的光信号传输路径上。凹槽17包括相连接第四光学面17b和第五光学面17a，在图4所示实施例中，凹槽17的截面形状为三角形，第四光学面17b和第五光学面17a分别为凹槽17的两个侧面。第四光学面17b和第五光学面17a可以相互垂直或近似垂直，第四光学面17b和第五光学面17a以及位于第四光学面17b和第五光学面17a之间的滤波片16的第一光学面16a围成镂空区，镂空区即为凹槽17所围成的空间。A groove 17 is provided on the mounting surface 15 a, and the groove 17 is located on the optical signal transmission path between the fiber lens 14 and the filter 16. The groove 17 includes a fourth optical surface 17b and a fifth optical surface 17a connected to each other. In the embodiment shown in FIG. 4, the cross-sectional shape of the groove 17 is a triangle, and the fourth optical surface 17b and the fifth optical surface 17a are concave respectively. The two sides of the slot 17. The fourth optical surface 17b and the fifth optical surface 17a may be perpendicular or approximately perpendicular to each other. An optical surface 16a encloses a hollow area, and the hollow area is the space enclosed by the groove 17.

滤波片16包括相对设置的第一光学面16a和第二光学面16b，其中，第一光学面16a镀有第一功能膜，第一功能膜可以反射第二光信号，透射第一光信号；第二光学面16b上镀有第二功能膜，第二功能膜用于透射第一光信号，或者，透射一部分第一光信号进入滤波片16内部，反射另一部分第一光信号至安装槽15外。The filter 16 includes a first optical surface 16a and a second optical surface 16b that are arranged oppositely, wherein the first optical surface 16a is plated with a first functional film, and the first functional film can reflect the second optical signal and transmit the first optical signal; A second functional film is plated on the second optical surface 16b. The second functional film is used to transmit the first optical signal, or to transmit a part of the first optical signal into the filter 16, and reflect another part of the first optical signal to the mounting groove 15. outside.

滤波片16固定安装在安装槽15内，滤波片16的第一光学面16a为与安装面15a连接的连接面，滤波片16的第一光学面16a与位于凹槽17周围的安装面15a固定连接，例如采用结构胶粘结。安装面15a与凹槽17的槽口对应的区域由于被去除，使得第一光学面16a与凹槽17的槽口对应的区域没有粘结对象，因而在此区域，即第一光学面16a与凹槽17的槽口对应的区域不需要设置结构胶，因此，在利用结构胶在将滤波片16固定安装在安装面15a上的同时，由于与凹槽17槽口对应的部分第一光学面16a上不需要设置结构胶，因此，不会在凹槽17的槽口对应的部分第一光学面16a或结构胶中产生气泡，使得第一光信号和第二光信号能够在滤波片16和光纤透镜14之间的光信号传播路径上基本无损地穿过镂空区，与相关技术中第一光学面16a上的光学胶内存在气泡相比，保证滤波片16的透过率和反射率，提升了光学耦合***10的性能。The filter 16 is fixedly installed in the mounting groove 15. The first optical surface 16a of the filter 16 is the connecting surface connected to the mounting surface 15a, and the first optical surface 16a of the filter 16 is fixed to the mounting surface 15a located around the groove 17. Connection, for example, using structural adhesive bonding. The area corresponding to the notch of the mounting surface 15a and the groove 17 is removed, so that the area corresponding to the notch of the first optical surface 16a and the groove 17 has no bonding object. Therefore, in this area, the first optical surface 16a and The area corresponding to the notch of the groove 17 does not need to be provided with structural adhesive. Therefore, while the filter 16 is fixedly installed on the mounting surface 15a by using the structural adhesive, the part of the first optical surface corresponding to the notch of the groove 17 is There is no need to provide structural glue on 16a. Therefore, no bubbles will be generated in the first optical surface 16a or structural glue corresponding to the notch of the groove 17, so that the first optical signal and the second optical signal can pass through the filter 16 and The optical signal propagation path between the optical fiber lenses 14 passes through the hollow area basically without loss. Compared with the bubbles in the optical glue on the first optical surface 16a in the related art, the transmittance and reflectance of the filter 16 are ensured. The performance of the optical coupling system 10 is improved.

图5为本申请实施例提供的一种光学主体和滤波片未组装前的立体图，图6为本申请实施例提供的光学主体和滤波片组装后的立体图。如图5和图6所示，安装槽15为长条形槽，在安装面15a的中部设有凹槽17，凹槽17的槽口形成在安装面15a上，凹槽17的槽体凹入光学主体11内。沿安装面15a的长度方向，滤波片16的第一光学面16a与凹槽17两侧的安装面15a之间通过结构胶粘结，结构胶包括但不限于UV固化型、热固化型或UV和热双固化型的环氧胶。采用结构胶粘结固定滤波片16，与相关技术中采用光学胶粘结固定滤波片16相比，结构胶具有强度高、粘结力大、耐老化、耐疲劳和耐腐蚀等优点，从而能够降低滤波片16从光学主体11上脱落的风险。FIG. 5 is a perspective view of an optical body and a filter before being assembled according to an embodiment of the application, and FIG. 6 is a perspective view of the optical body and a filter after being assembled according to an embodiment of the application. As shown in Figures 5 and 6, the mounting groove 15 is an elongated groove. A groove 17 is provided in the middle of the mounting surface 15a. The notch of the groove 17 is formed on the mounting surface 15a. The groove body of the groove 17 is concave. Into the optical body 11. Along the length direction of the mounting surface 15a, the first optical surface 16a of the filter 16 and the mounting surfaces 15a on both sides of the groove 17 are bonded by structural glue. The structural glue includes but is not limited to UV curing type, thermal curing type or UV And thermal dual-curing epoxy adhesive. The filter 16 is bonded and fixed by structural adhesive. Compared with the optical adhesive used in the related art to bond and fix the filter 16, the structural adhesive has the advantages of high strength, large bonding force, aging resistance, fatigue resistance and corrosion resistance, etc., so that it can The risk of the filter 16 falling off the optical body 11 is reduced.

需要说明的是，上述实施例中，结构胶设于滤波片16的第一光学面16a和凹槽17的槽口周围的安装面15a之间，但不限于此，还可以将结构胶设于其他位置来将滤波片16固定安装在安装面15a上，例如，如图5所示，结构胶设于：滤波片16的侧面16c和安装槽15的侧面15c之间，以及滤波片16的侧面16d和安装槽15的侧面15d之间，利用结构胶来粘结侧面16c和侧面15c，以及粘结侧面16d和侧面15d，此时，滤波片16的第一光学面16a和安装面15a可以直接贴合，两者之间可以不设置结构胶。It should be noted that in the above embodiment, the structural glue is provided between the first optical surface 16a of the filter 16 and the mounting surface 15a around the notch of the groove 17, but it is not limited to this, and the structural glue can also be arranged on Fix the filter 16 on the mounting surface 15a at other positions. For example, as shown in FIG. 5, the structural glue is set between the side 16c of the filter 16 and the side 15c of the mounting groove 15, and the side of the filter 16 Between 16d and the side surface 15d of the mounting groove 15, the side surface 16c and the side surface 15c, and the side surface 16d and the side 15d are bonded with structural adhesive. At this time, the first optical surface 16a and the mounting surface 15a of the filter 16 can be directly bonded. For bonding, no structural glue is required between the two.

具有上述结构的光学耦合***10的双向光通信过程如下：The two-way optical communication process of the optical coupling system 10 with the above-mentioned structure is as follows:

从光纤23输出的第二光信号(图2中波长为λ2的光信号)射至光纤透镜14后，经光纤透镜14准直后进入光学主体11中，第二光信号在光学主体11中射向镂空区， 由于镂空区内除了空气外无其它物质，因此第二光信号可以基本无损地穿过镂空区17后射至滤波片16的第一光学面16a，第二光信号在滤波片16的第一光学面16a上被滤波片16的第一光学面16a反射至输出透镜13，经输出透镜13准直后射向光敏二极管22。The second optical signal output from the optical fiber 23 (the optical signal with a wavelength of λ2 in FIG. 2) is incident on the optical fiber lens 14, collimated by the optical fiber lens 14, and then enters the optical body 11, and the second optical signal is emitted in the optical body 11. To the hollow area, because there is no other material in the hollow area except air, the second optical signal can pass through the hollow area 17 without any damage and then is transmitted to the first optical surface 16a of the filter 16, and the second optical signal is in the filter 16. The first optical surface 16a of the filter 16 is reflected by the first optical surface 16a of the filter 16 to the output lens 13, collimated by the output lens 13, and then directed toward the photodiode 22.

从VCSEL21发出的第一光信号(图2中波长为λ1的光信号)射向接收透镜12，经接收透镜12准直后在光学主体11中射向全内反射面11d，第一光信号射至全内反射面11d上后被全内反射面11d全反射至滤波片16的第二光学面16b，此时第一光信号不会发生反射，而是折射进入滤波片16的内部，到达滤波片16的第一光学面16a后再次折射，从滤波片16的第一光学面16a射出的第一光信号穿过镂空区后射向光纤透镜14，经光纤透镜14准直后射入光纤23中。The first optical signal sent from the VCSEL 21 (the optical signal with the wavelength λ1 in Figure 2) is directed to the receiving lens 12, collimated by the receiving lens 12, and then directed to the total internal reflection surface 11d in the optical body 11, and the first optical signal is projected After reaching the total internal reflection surface 11d, it is totally reflected by the total internal reflection surface 11d to the second optical surface 16b of the filter 16. At this time, the first optical signal will not be reflected, but will be refracted into the filter 16 and reach the filter. After the first optical surface 16a of the sheet 16 is refracted again, the first optical signal emitted from the first optical surface 16a of the filter 16 passes through the hollow area and then is incident on the fiber lens 14, collimated by the fiber lens 14, and then injected into the optical fiber 23 middle.

在本申请实施例提供的光学耦合***10中，由于在安装槽15的安装面15a上设有凹槽17，凹槽17与凹槽17的槽口对应的第一光学面16a围成镂空区，镂空区位于滤波片16和光纤透镜14之间的光信号传播路径上；因此，位于凹槽17的槽口对应区域内的第一光学面16a上不需要设置光学胶，使得位于镂空区内的第一光学面16a上不会出现由光学胶引起的气泡，从而使得第一光信号和第二光信号可以基本无损地穿过镂空区并到达滤波片16的第一光学面16a，保证了滤波片16的透过率和反射率，进而提升了光学耦合***10的性能。In the optical coupling system 10 provided by the embodiment of the present application, since the groove 17 is provided on the installation surface 15a of the installation groove 15, the groove 17 and the first optical surface 16a corresponding to the notch of the groove 17 enclose a hollow area , The hollow area is located on the optical signal propagation path between the filter 16 and the fiber lens 14; therefore, the first optical surface 16a located in the area corresponding to the notch of the groove 17 does not need to be provided with optical glue, so that it is located in the hollow area No bubbles caused by the optical glue will appear on the first optical surface 16a, so that the first optical signal and the second optical signal can pass through the hollow area substantially without loss and reach the first optical surface 16a of the filter 16, ensuring The transmittance and reflectivity of the filter 16 further improve the performance of the optical coupling system 10.

在上述实施例中全内反射面11d由光学主体11中的反光槽18的一个内侧面形成，但不限于此。例如，如图7所示，光学主体11设有第二侧部边界面11c，第二侧部边界面11c相对底部边界面11a倾斜，例如图7所示的锐角；全内反射面11d形成在第二侧部边界面11c上，或者说，第二侧部边界面11c为全内反射面11d。又如，如图8所示，第二侧部边界面11c的顶部连接有斜面，该斜面形成全内反射面11d，或者说，全内反射面11d形成在连接在第二侧部边界面11a顶部的斜面中。在图7和图8所示的光学主体11中，全内反射面11d形成在光学主体11的边界面上，简化了光学主体11的结构，此外也缩小了光学主体11的体积，有利于光学耦合***和光模块的小型化。In the above embodiment, the total internal reflection surface 11d is formed by an inner side surface of the reflective groove 18 in the optical body 11, but it is not limited to this. For example, as shown in FIG. 7, the optical body 11 is provided with a second side boundary surface 11c, and the second side boundary surface 11c is inclined with respect to the bottom boundary surface 11a, such as the acute angle shown in FIG. 7; the total internal reflection surface 11d is formed on On the second side boundary surface 11c, in other words, the second side boundary surface 11c is a total internal reflection surface 11d. As another example, as shown in FIG. 8, the top of the second side boundary surface 11c is connected with an inclined surface, which forms a total internal reflection surface 11d, or in other words, a total internal reflection surface 11d is formed on the second side boundary surface 11a. In the top slope. In the optical body 11 shown in FIGS. 7 and 8, the total internal reflection surface 11d is formed on the boundary surface of the optical body 11, which simplifies the structure of the optical body 11, and also reduces the volume of the optical body 11, which is beneficial to optics. Miniaturization of coupling systems and optical modules.

场景二Scene two

图9为本申请实施例提供的另一种光模块的剖视图。如图9所示，本申请实施例提供的光模块包括基板20、VCSEL21、光敏二极管22、光纤23、驱动电路24、监测光敏件25和光学耦合***10，其中，VCSEL21、光敏二极管22、光纤23、驱动电路24和基板20的设置方式和作用与上述场景一中基本相同，参见上述相关描述即可。FIG. 9 is a cross-sectional view of another optical module provided by an embodiment of the application. As shown in FIG. 9, the optical module provided by the embodiment of the present application includes a substrate 20, a VCSEL 21, a photodiode 22, an optical fiber 23, a driving circuit 24, a monitoring photosensitive member 25, and an optical coupling system 10, where the VCSEL 21, the photodiode 22, and the optical fiber 23. The setting mode and function of the driving circuit 24 and the substrate 20 are basically the same as those in the above scenario 1, so please refer to the above related description.

图10为图9中光学耦合***的剖视图，图11为图10中光学主体的剖视图。如图10和图11所示，本申请实施例提供的光学耦合***10包括光学主体11和滤波片16，其中，光学主体11具有相对设置的第一侧部边界面11b和第二侧部边界面11c，以及位于第一侧部边界面11b和第二侧部边界面11c之间的底部边界面11a；底部边界面11a上形成有接收透镜12、输出透镜13和监测透镜19，第一侧部边界面11b上形成有光纤透镜14，接收透镜12、输出透镜13和光纤透镜14与上述场景一中的设置方式和作用相同，参见上述相关描述即可。10 is a cross-sectional view of the optical coupling system in FIG. 9, and FIG. 11 is a cross-sectional view of the optical body in FIG. 10. As shown in FIGS. 10 and 11, the optical coupling system 10 provided by the embodiment of the present application includes an optical body 11 and a filter 16, wherein the optical body 11 has a first side boundary surface 11b and a second side edge disposed oppositely. The interface 11c, and the bottom boundary surface 11a between the first side boundary surface 11b and the second side boundary surface 11c; the bottom boundary surface 11a is formed with a receiving lens 12, an output lens 13 and a monitoring lens 19, the first side An optical fiber lens 14 is formed on the boundary surface 11b. The receiving lens 12, the output lens 13 and the optical fiber lens 14 are the same as the setting methods and functions in the above scenario 1, please refer to the above related description.

监测透镜19形成在底部边界面11a上，并与基板20上的监测光敏件25相对，用 于接收由第三光学面15b反射回全内反射面11d并在全内反射面11d上再次反射的部分第一光信号。监测透镜19位于接收透镜12和输出透镜13之间，相应的，监测光敏件(英文全称：Monitor photo diode，简称为MPD)25位于VCSEL21和光敏二极管22之间，与相关技术中监测光敏件25位于VCSEL21和驱动电路24之间相比，连接VCSEL21和驱动电路24的信号线不需要绕过监测光敏件25，缩短了该信号线的长度，提升了光模块的性能。The monitoring lens 19 is formed on the bottom boundary surface 11a and is opposite to the monitoring photosensitive member 25 on the substrate 20, and is used to receive the light reflected by the third optical surface 15b back to the total internal reflection surface 11d and again on the total internal reflection surface 11d. Part of the first optical signal. The monitoring lens 19 is located between the receiving lens 12 and the output lens 13, and correspondingly, the monitoring photosensitive member (English full name: Monitor photodiode, MPD for short) 25 is located between the VCSEL 21 and the photosensitive diode 22, which is similar to the monitoring photosensitive member 25 in the related technology. Compared with the VCSEL 21 and the driving circuit 24, the signal line connecting the VCSEL 21 and the driving circuit 24 does not need to bypass the monitoring photosensitive member 25, which shortens the length of the signal line and improves the performance of the optical module.

在第一侧部边界面11b和第二侧部边界面11c之间，光学主体11还设置有安装槽15和反光槽18，其中，反光槽18靠近第二侧部边界面11c，安装槽15靠近第一侧部边界面11b，反光槽18靠近第一侧部边界面11b的内侧面为全内反射面11d，全内反射面11d相对底部边界面11a倾斜，用于全反射由接收透镜12射向全内反射面11d的第一光信号至滤波片16。Between the first side boundary surface 11b and the second side boundary surface 11c, the optical body 11 is further provided with a mounting groove 15 and a light reflecting groove 18, wherein the light reflecting groove 18 is close to the second side boundary surface 11c, and the mounting groove 15 Close to the first side boundary surface 11b, the inner surface of the reflective groove 18 close to the first side boundary surface 11b is a total internal reflection surface 11d. The total internal reflection surface 11d is inclined relative to the bottom boundary surface 11a for total reflection by the receiving lens 12 The first optical signal directed to the total internal reflection surface 11 d reaches the filter 16.

安装槽15位于全内反射面11d和第一侧部边界面11b之间，安装槽15包括安装面15a和支撑面15e，安装面15a相对第一侧部边界面11b和底部边界面11a倾斜，支撑面15e与安装面15a连接，两者之间的夹角可近似90度。滤波片16安装在安装面15a上，由于安装面15a相对底部边界面11a倾斜，因此，滤波片16也相对底部边界面11a倾斜。滤波片16指向底部边界面11a的侧面与支撑面15e相抵，支撑面15e与安装面15a共同支撑滤波片16，以使滤波片16稳定地安装在安装槽15内。The mounting groove 15 is located between the total internal reflection surface 11d and the first side boundary surface 11b. The mounting groove 15 includes a mounting surface 15a and a supporting surface 15e. The mounting surface 15a is inclined with respect to the first side boundary surface 11b and the bottom boundary surface 11a, The supporting surface 15e is connected to the mounting surface 15a, and the included angle between the two may be approximately 90 degrees. The filter 16 is mounted on the mounting surface 15a. Since the mounting surface 15a is inclined with respect to the bottom boundary surface 11a, the filter 16 is also inclined with respect to the bottom boundary surface 11a. The side surface of the filter 16 directed toward the bottom boundary surface 11a is opposed to the support surface 15e, and the support surface 15e and the mounting surface 15a jointly support the filter 16 so that the filter 16 is stably installed in the mounting groove 15.

安装面15a上设有凹槽17，凹槽17位于光纤透镜14和滤波片16之间的光信号传输路径上。凹槽17包括相连接第四光学面17b和第五光学面17a，凹槽17的截面形状为三角形，第四光学面17b和第五光学面17a分别为凹槽17的两个侧面。在本实施例中，第四光学面17b和第五光学面17a之间的夹角为钝角，第四光学面17b和第五光学面17a以及位于第四光学面17b和第五光学面17a之间的第一光学面16a围成镂空区。A groove 17 is provided on the mounting surface 15 a, and the groove 17 is located on the optical signal transmission path between the fiber lens 14 and the filter 16. The groove 17 includes a fourth optical surface 17 b and a fifth optical surface 17 a that are connected to each other. The cross-sectional shape of the groove 17 is a triangle. The fourth optical surface 17 b and the fifth optical surface 17 a are two side surfaces of the groove 17, respectively. In this embodiment, the angle between the fourth optical surface 17b and the fifth optical surface 17a is an obtuse angle, and the fourth optical surface 17b and the fifth optical surface 17a are located between the fourth optical surface 17b and the fifth optical surface 17a. The first optical surface 16a therebetween forms a hollow area.

滤波片16包括相对设置的第一光学面16a和第二光学面16b，其中，第一光学面16a镀有第一功能膜，第一功能膜可以反射第二光信号，透射第一光信号；第二光学面16b上镀有第二功能膜，第二功能膜用于透射第一光信号，或者，透射一部分第一光信号进入滤波片16内部，反射另一部分第一光信号至安装槽15外。The filter 16 includes a first optical surface 16a and a second optical surface 16b that are arranged oppositely, wherein the first optical surface 16a is plated with a first functional film, and the first functional film can reflect the second optical signal and transmit the first optical signal; A second functional film is plated on the second optical surface 16b. The second functional film is used to transmit the first optical signal, or to transmit a part of the first optical signal into the filter 16, and reflect another part of the first optical signal to the mounting groove 15. outside.

滤波片16固定安装在安装槽15内，滤波片16的第一光学面16a为与安装面15a连接的连接面，第一光学面16a与位于凹槽17周围的安装面15a固定连接，例如采用结构胶粘结。凹槽17的槽口对应的第一光学面16a上不设置结构胶，因此，利用结构胶在将滤波片16固定安装在安装面15a上的同时，由于凹槽17的槽口对应的第一光学面16a上不设置结构胶，因此，不会在凹槽17的槽口对应的第一光学面16a上产生气泡，从而使得第一光信号和第二光信号在滤波片16和光纤透镜14之间的光信号传播路径上可以基本无损地穿过镂空区，与相关技术中第一光学面16a上有光学胶气泡相比，保证滤波片16的透过率和反射率，提升了光学耦合***的性能。The filter 16 is fixedly installed in the mounting groove 15. The first optical surface 16a of the filter 16 is a connecting surface connected to the mounting surface 15a, and the first optical surface 16a is fixedly connected to the mounting surface 15a located around the groove 17, for example, Structural adhesive bonding. The first optical surface 16a corresponding to the notch of the groove 17 is not provided with structural adhesive. Therefore, the structural adhesive is used to fix the filter 16 on the mounting surface 15a while the notch of the groove 17 corresponds to the first optical surface. No structural glue is provided on the optical surface 16a, so no bubbles will be generated on the first optical surface 16a corresponding to the notch of the groove 17, so that the first optical signal and the second optical signal are on the filter 16 and the fiber lens 14 The optical signal propagation path between the optical signals can pass through the hollow area basically without loss. Compared with the optical adhesive bubbles on the first optical surface 16a in the related art, the transmittance and reflectance of the filter 16 are ensured, and the optical coupling is improved. System performance.

安装槽15还包括第三光学面15b，第三光学面15b位于全内反射面11d和安装面15a之间，第三光学面15b用于透射一部分第一光信号进入滤波片16，以及反射另一部分第一光信号至全内反射面11d，也就是说，第一光信号射至第三光学面15b上后分为两部分：第一部分和第二部分，其中，第一部分第一光信号透过第三光学面15b 射向滤波片16；第二部分第一光信号被第三光学面15b反射回全内反射面11d。The mounting groove 15 also includes a third optical surface 15b, the third optical surface 15b is located between the total internal reflection surface 11d and the mounting surface 15a, the third optical surface 15b is used to transmit a part of the first light signal into the filter 16, and reflect the other A part of the first optical signal reaches the total internal reflection surface 11d, that is, the first optical signal is divided into two parts after being incident on the third optical surface 15b: a first part and a second part, wherein the first part of the first optical signal is transparent It passes through the third optical surface 15b to the filter 16; the second part of the first optical signal is reflected by the third optical surface 15b back to the total internal reflection surface 11d.

自接收透镜12射向全内反射面11d的第一光信号的入射点与自第三光学面15b反射回的第一光信号在全内反射面11d上的入射点不能重合，使得自接收透镜12射向全内反射面11d的第一光信号在全内反射面11d的反射点与自第三光学面15b反射回的第一光信号在全内反射面11d上的反射点错开，防止自第三光学面15b反射回的第一光信号被全内反射面11d反射回VCSEL21，进而防止这部分自第三光学面15b反射回的第一光信号影响VCSEL21发射第一光信号，提升VCSEL21抗干扰性。The incident point of the first optical signal from the receiving lens 12 to the total internal reflection surface 11d and the incident point of the first optical signal reflected from the third optical surface 15b on the total internal reflection surface 11d cannot coincide, so that the self-receiving lens 12 The reflection point of the first optical signal directed to the total internal reflection surface 11d on the total internal reflection surface 11d and the reflection point of the first optical signal reflected from the third optical surface 15b on the total internal reflection surface 11d are staggered to prevent self The first optical signal reflected by the third optical surface 15b is reflected back to the VCSEL 21 by the total internal reflection surface 11d, thereby preventing this part of the first optical signal reflected from the third optical surface 15b from affecting the VCSEL 21 to emit the first optical signal, and improving the resistance of the VCSEL 21 Intrusive.

示例性地，第三光学面15b的法线与射至第三光学面15b的第一光信号的中心线呈第一设定角度，由于第三光学面15b的法线和射至第三光学面15b的第一光信号的中心线之间的夹角为第一设定角度，使得从第三光学面15b反射回全内反射面11d上的第一光信号在全内反射面11d上的反射点，与从接收透镜12射至全内反射面11d的第一光信号在全内反射面11d上的反射点错开，防止由第三光学面15b反射回全内反射面11d上的第一光信号在全内反射面11d再次反射后反射回接收透镜12，从而可以防止其干扰由VCSEL21发射的第一光信号。Exemplarily, the normal line of the third optical surface 15b and the center line of the first optical signal incident on the third optical surface 15b are at a first set angle. The angle between the center lines of the first optical signal on the surface 15b is the first set angle, so that the first optical signal reflected from the third optical surface 15b back to the total internal reflection surface 11d is on the total internal reflection surface 11d. The reflection point is offset from the reflection point on the total internal reflection surface 11d of the first optical signal emitted from the receiving lens 12 to the total internal reflection surface 11d to prevent the third optical surface 15b from being reflected back to the first optical signal on the total internal reflection surface 11d. The optical signal is reflected again on the total internal reflection surface 11d and then reflected back to the receiving lens 12, thereby preventing it from interfering with the first optical signal emitted by the VCSEL 21.

由第三光学面15b反射回的第一光信号也称为第一光信号的回损光，第一设定角度越小，被第三光学面15b反射回全内反射面11d的第一光信号越少，透过第三光学面15b的第一光信号越多，即回损光较少，第一光信号的利用率较高；但这种情况会导致由第三光学面15b反射回的第一光信号的光程较长，增大光学主体11的体积。第一设定角度越大，被第三光学面15b反射回全内反射面11d的第一光信号越多，透过第三光学面15b的第一光信号越少，即这种情况的回损光较多，第一光信号的利用率较低，相应的光学主体11的体积变小。因此，第一设定角度的设定需要综合考量回损光的多少、光程的大小，第一设定角度可以为1度-15度，例如第一设定角度为8度。The first optical signal reflected by the third optical surface 15b is also called the return loss light of the first optical signal. The smaller the first set angle, the first light reflected by the third optical surface 15b back to the total internal reflection surface 11d The less the signal, the more the first optical signal that passes through the third optical surface 15b, that is, the less return loss light, the higher the utilization of the first optical signal; but this situation will cause the third optical surface 15b to be reflected back The optical path of the first optical signal is longer, which increases the volume of the optical body 11. The larger the first set angle, the more the first optical signal reflected by the third optical surface 15b back to the total internal reflection surface 11d, and the less the first optical signal passing through the third optical surface 15b, that is, the return in this case There is more light loss, the utilization rate of the first optical signal is lower, and the volume of the corresponding optical body 11 becomes smaller. Therefore, the setting of the first set angle requires comprehensive consideration of the amount of return loss and the size of the optical path. The first set angle may be 1 degree to 15 degrees, for example, the first set angle is 8 degrees.

可以理解的是，第二光信号从滤波片16的第一光学面16a反射至第五光学面17a时，第二光信号也可能被分为两部分：一部分第二光信号透过第五光学面17a后射向光敏二极管22；另一部分第二光信号在第五光学面17a上发生反射后射向滤波片16的第一光学面16a，并在滤波片16的第一光学面16a上再次反射后射出安装槽17外。为了避免由第五光学面17a反射回第一光学面16a的第二光信号在第一光学面16a上与由光纤透镜14射向第一光学面16a的第二光信号在第一光学面16a上发生干涉，由第五光学面17a反射回第一光学面16a的第二光信号在第一光学面16a上的反射点，与由光纤透镜14射向第一光学面16a的第二光信号在第一光学面16a上的反射点错开。It is understandable that when the second optical signal is reflected from the first optical surface 16a of the filter 16 to the fifth optical surface 17a, the second optical signal may also be divided into two parts: a part of the second optical signal passes through the fifth optical surface. After surface 17a, it is directed to the photodiode 22; another part of the second light signal is reflected on the fifth optical surface 17a and then directed to the first optical surface 16a of the filter 16, and on the first optical surface 16a of the filter 16 again After reflection, it is shot out of the installation slot 17. In order to avoid that the second optical signal reflected by the fifth optical surface 17a back to the first optical surface 16a is on the first optical surface 16a and the second optical signal emitted by the fiber lens 14 to the first optical surface 16a is on the first optical surface 16a The second optical signal reflected by the fifth optical surface 17a back to the first optical surface 16a is reflected on the first optical surface 16a, and the second optical signal emitted by the fiber lens 14 to the first optical surface 16a The reflection points on the first optical surface 16a are staggered.

示例性地，第五光学面17a的法线与射至第五光学面17a的第二光信号的中心线呈第二设定角度，由于第五光学面17a的法线和射至第五光学面17a的第二光信号的中心线之间的夹角为第二设定角度，使得从第五光学面17a反射回第一光学面16a上的第二光信号在第一光学面16a上的反射点，由光纤透镜14射向第一光学面16a的第二光信号在第一光学面16a上的反射点错开，防止由第五光学面17a反射回第一光学面16a上的第二光信号在第一光学面16a再次反射后反射回光纤透镜14，从而可以防止其干扰由光纤23发射的第二光信号。Exemplarily, the normal line of the fifth optical surface 17a and the center line of the second optical signal incident on the fifth optical surface 17a are at a second set angle. The angle between the center lines of the second optical signal on the surface 17a is the second set angle, so that the second optical signal reflected from the fifth optical surface 17a back to the first optical surface 16a is on the first optical surface 16a. The reflection point, the second light signal emitted by the fiber lens 14 to the first optical surface 16a has a reflection point staggered on the first optical surface 16a to prevent the second light on the first optical surface 16a from being reflected back by the fifth optical surface 17a The signal is reflected again on the first optical surface 16a and then reflected back to the optical fiber lens 14, thereby preventing it from interfering with the second optical signal emitted by the optical fiber 23.

由第五光学面17a反射回的第二光信号也称为第二光信号的回损光，第二设定角度越小，被第五光学面17a反射回第一光学面16a的第二光信号越少，透过第五光学 面17a的第二光信号越多，即回损光较少，第二光信号的利用率较高；但这种情况会导致由第五光学面17a反射回的第二光信号的光程较长，增大光学主体11的体积。第二设定角度越大，被第五光学面17a反射回第一光学面16a的第二光信号越多，透过第五光学面17a的第二光信号越少，即这种情况的回损光较多，第二光信号的利用率较低，相应的光学主体11的体积变小。第二设定角度的设定需要综合考量回损光的多少、光程的大小，第二设定角度可以为1度-15度，例如第二设定角度为8度。The second optical signal reflected by the fifth optical surface 17a is also called the return loss light of the second optical signal. The smaller the second set angle, the second light reflected by the fifth optical surface 17a back to the first optical surface 16a The less the signal, the more the second optical signal passing through the fifth optical surface 17a, that is, the less return loss light, the higher the utilization rate of the second optical signal; but this situation will cause the fifth optical surface 17a to be reflected back The optical path of the second optical signal is longer, which increases the volume of the optical body 11. The larger the second setting angle, the more the second optical signal reflected by the fifth optical surface 17a back to the first optical surface 16a, and the less the second optical signal passing through the fifth optical surface 17a, that is, the return in this case There is more light loss, the utilization rate of the second optical signal is lower, and the volume of the corresponding optical body 11 becomes smaller. The setting of the second setting angle requires comprehensive consideration of the amount of return loss and the size of the optical path. The second setting angle can be 1 degree to 15 degrees, for example, the second setting angle is 8 degrees.

具有上述结构的光学耦合***10的双向光通信过程如下：The two-way optical communication process of the optical coupling system 10 with the above-mentioned structure is as follows:

从光纤23输出的第二光信号(波长为λ2的光信号)射至光纤透镜14后，经光纤透镜14准直后进入光学主体11中，第二光信号在光学主体11中射向镂空区，由于镂空区内除了空气外无其他物质，因此第二光信号可以基本无损地穿过镂空区17射向滤波片16的第一光学面16a，第二光信号在滤波片16的第一光学面16a上被第一光学面16a反射至输出透镜13，经输出透镜13准直后射向光敏二极管22。The second optical signal (optical signal with a wavelength of λ2) output from the optical fiber 23 is transmitted to the fiber lens 14, collimated by the fiber lens 14, and then enters the optical body 11, and the second optical signal is emitted to the hollow area in the optical body 11 Since there is no other substance in the hollowed-out area except air, the second optical signal can pass through the hollowed-out area 17 to the first optical surface 16a of the filter 16, and the second optical signal is on the first optical surface 16a of the filter 16. The surface 16a is reflected by the first optical surface 16a to the output lens 13, collimated by the output lens 13, and then directed toward the photodiode 22.

从VCSEL21发出的第一光信号(波长为λ1的光信号)射向接收透镜12，经接收透镜12准直后进入光学主体11中，并射向全内反射面11d，第一光信号射至全内反射面11d上后被全内反射面11d反射至第三光学面15b，第一光信号在第三光学面15b上被分为两部分，其中一部分透射至滤波片16的第二光学面16b，之后折射进入滤波片16的内部，到达滤波片16的第一光学面16a后再次折射，从滤波片16的第一光学面16a射出的第一光信号穿过镂空区后射向光纤透镜14，经光纤透镜14准直后射入光纤23中；另一部分第一光信号被第三光学面15b反射回全内反射面11d，并经全内反射面11d再次反射后射向监测透镜19，经过监测透镜19准直后射向监测光敏件25中。The first optical signal (optical signal with a wavelength of λ1) emitted from the VCSEL 21 is directed to the receiving lens 12, collimated by the receiving lens 12, enters the optical body 11, and is directed to the total internal reflection surface 11d, and the first optical signal is directed to After the total internal reflection surface 11d is reflected to the third optical surface 15b by the total internal reflection surface 11d, the first optical signal is divided into two parts on the third optical surface 15b, and one part is transmitted to the second optical surface of the filter 16 16b, after refraction enters the interior of the filter 16, reaches the first optical surface 16a of the filter 16, and then refracts again. The first optical signal emitted from the first optical surface 16a of the filter 16 passes through the hollow area and is directed to the fiber lens 14. After collimated by the fiber lens 14, it is injected into the optical fiber 23; another part of the first optical signal is reflected by the third optical surface 15b back to the total internal reflection surface 11d, and is reflected again by the total internal reflection surface 11d and then directed toward the monitoring lens 19 , After being collimated by the monitoring lens 19, it is directed to the monitoring photosensitive member 25.

在本申请实施例提供的光学耦合***中，由于在安装槽15的安装面15a上设有凹槽17，凹槽17与凹槽17的槽口对应的部分第一光学面16b围成镂空区，镂空区位于滤波片16和光纤透镜14之间的光信号传播路径上；因此，位于凹槽17的槽口对应区域内的第一光学面16a上不需要设置光学胶，使得位于镂空区内的滤波片16的第一光学面16a上不会出现光学胶引起的气泡，从而使得第一光信号和第二光信号可以基本无损地穿过镂空区，保证了滤波片16的透过率和反射率，进而提升了光学耦合***10的性能。In the optical coupling system provided by the embodiment of the present application, since the groove 17 is provided on the installation surface 15a of the installation groove 15, the groove 17 and the portion of the first optical surface 16b corresponding to the notch of the groove 17 enclose a hollow area , The hollow area is located on the optical signal propagation path between the filter 16 and the fiber lens 14; therefore, the first optical surface 16a located in the area corresponding to the notch of the groove 17 does not need to be provided with optical glue, so that it is located in the hollow area No bubbles caused by optical glue will appear on the first optical surface 16a of the filter 16, so that the first optical signal and the second optical signal can pass through the hollow area substantially without loss, ensuring the transmittance and transmittance of the filter 16 The reflectivity further improves the performance of the optical coupling system 10.

同时，第一光信号在经过第三光学面15b时，被第三反射面15b反射回全内反射面11d的另一部分的第一光信号，在全内反射面11d上再次反射后射向监测透镜19，由监测透镜19准直后射向监测光敏件25，利用监测光敏件25可以监测第一光信号的强度，从而可以监测到VCSEL21的功率，并可根据实际需要调整VCSEL21的功率。At the same time, when the first optical signal passes through the third optical surface 15b, the first optical signal that is reflected by the third reflective surface 15b back to the other part of the total internal reflection surface 11d is reflected again on the total internal reflection surface 11d and then directed toward the monitoring The lens 19 is collimated by the monitoring lens 19 and directed toward the monitoring photosensitive member 25. The monitoring photosensitive member 25 can monitor the intensity of the first light signal, so that the power of the VCSEL 21 can be monitored, and the power of the VCSEL 21 can be adjusted according to actual needs.

场景三Scene three

图12为本申请实施例提供的又一种光模块的剖视图。如图12所示，本申请实施例提供的光模块与上述场景二中的光模块的结构基本相同，相同部分参见上述相关描述即可，在此不再赘述。FIG. 12 is a cross-sectional view of another optical module provided by an embodiment of the application. As shown in FIG. 12, the structure of the optical module provided by the embodiment of the present application is basically the same as that of the optical module in the foregoing scenario 2, and for the same part, refer to the foregoing related description, and details are not described herein again.

本实施例与上述场景二的不同之处在于：滤波片16的第二光学面16b上的第二功能膜，能够使射向第二光学面16b的第一光信号的一部分透过进入滤波片16内，另一部分第一光信号被第二光学面16b反射出安装槽15外。如此设计，当VCSEL21发射的 第一光信号的强度较大时，利用滤波片16的第二光学面16b可以将部分第一光信号反射出安装槽15外，如此可以降低进入光纤23中的第一光信号的强度，使得每次进入光纤23中的第一光信号的强度基本一致，提升光纤通信的稳定性。The difference between this embodiment and the second scenario above is that the second functional film on the second optical surface 16b of the filter 16 can allow a part of the first optical signal directed to the second optical surface 16b to pass into the filter. In 16, another part of the first optical signal is reflected out of the installation groove 15 by the second optical surface 16b. With this design, when the intensity of the first optical signal emitted by the VCSEL 21 is high, the second optical surface 16b of the filter 16 can be used to reflect part of the first optical signal out of the installation groove 15, so that the first optical signal entering the optical fiber 23 can be reduced. The intensity of an optical signal makes the intensity of the first optical signal that enters the optical fiber 23 basically the same every time, which improves the stability of optical fiber communication.

具有上述结构的光学耦合***10的双向光通信过程如下：The two-way optical communication process of the optical coupling system 10 with the above-mentioned structure is as follows:

从光纤23输出的第二光信号射至光纤透镜14后，经光纤透镜14准直后进入光学主体11中，第二光信号在光学主体11中射向镂空区，由于镂空区内除了空气外无其他物质，因此第二光信号可以基本无损地穿过镂空区17射向滤波片16的第一光学面16a，第二光信号在滤波片16的第一光学面16a上被第一光学面16a反射至输出透镜13，经输出透镜13准直后射向光敏二极管22。After the second optical signal output from the optical fiber 23 reaches the fiber lens 14, it is collimated by the fiber lens 14 and then enters the optical body 11. The second optical signal is directed to the hollow area in the optical body 11. No other substances, so the second optical signal can pass through the hollow area 17 to the first optical surface 16a of the filter 16, and the second optical signal is transmitted by the first optical surface 16a of the filter 16. 16a is reflected to the output lens 13, collimated by the output lens 13, and then directed toward the photodiode 22.

从VCSEL21发出的第一光信号射向接收透镜12，经接收透镜12准直后进入光学主体11中，并射向全内反射面11d，第一光信号射至全内反射面11d上后被全内反射面11d全反射至第三光学面15b，第一光信号在第三光学面15b上被分为两部分，其中一部分第一光信号被第三光学面15b反射回全内反射面11d，并经全内反射面11d再次反射后射向监测透镜19，经过监测透镜19准直后射向监测光敏件25中。另一部分透射至滤波片16的第二光学面16b之后再次被分为两部分，其中一部分第一光信号折射进入滤波片16的内部，到达滤波片16的第一光学面16a后再次折射，从滤波片16的第一光学面16a射出的第一光信号穿过镂空区后射向光纤透镜14，经光纤透镜14准直后射入光纤23中；另一部分第一光信号在滤波片16的第二光学面16b被反射出安装槽15外。The first optical signal emitted from the VCSEL 21 is directed to the receiving lens 12, collimated by the receiving lens 12, enters the optical body 11, and is directed to the total internal reflection surface 11d. The first optical signal is projected onto the total internal reflection surface 11d and is The total internal reflection surface 11d is totally reflected to the third optical surface 15b, the first optical signal is divided into two parts on the third optical surface 15b, and a part of the first optical signal is reflected by the third optical surface 15b back to the total internal reflection surface 11d , And after being reflected again by the total internal reflection surface 11d, it is directed toward the monitoring lens 19, and after being collimated by the monitoring lens 19, it is directed toward the monitoring photosensitive member 25. The other part is transmitted to the second optical surface 16b of the filter 16 and then divided into two parts again. A part of the first optical signal is refracted into the interior of the filter 16, and then refracted again after reaching the first optical surface 16a of the filter 16, from The first optical signal emitted from the first optical surface 16a of the filter 16 passes through the hollow area and then is directed to the fiber lens 14, collimated by the fiber lens 14 and then injected into the optical fiber 23; another part of the first optical signal is in the filter 16 The second optical surface 16b is reflected out of the installation groove 15.

在本申请实施例提供的光学耦合***中，由于在安装槽15的安装面15a上设有凹槽17，凹槽17与凹槽17的槽口对应的第一光学面16b围成镂空区，镂空区位于滤波片16和光纤透镜14之间的光信号传播路径上；因此，位于凹槽17的槽口对应区域内的第一光学面16a上不需要设置光学胶，使得位于镂空区内的滤波片16的第一光学面16a上不会出现光学胶引起的气泡，从而使得第一光信号和第二光信号可以基本无损地穿过镂空区，保证了滤波片16的透过率和反射率，进而提升了光学耦合***10的性能。In the optical coupling system provided by the embodiment of the present application, since the groove 17 is provided on the mounting surface 15a of the mounting groove 15, the groove 17 and the first optical surface 16b corresponding to the notch of the groove 17 enclose a hollow area, The hollow area is located on the optical signal propagation path between the filter 16 and the fiber lens 14; therefore, there is no need to provide optical glue on the first optical surface 16a in the area corresponding to the notch of the groove 17, so that the optical glue is located in the hollow area No bubbles caused by optical glue appear on the first optical surface 16a of the filter 16, so that the first optical signal and the second optical signal can pass through the hollow area substantially without loss, ensuring the transmittance and reflection of the filter 16 Therefore, the performance of the optical coupling system 10 is improved.

同时，第一光信号在经过第三光学面15b时，另一部分的第一光信号被第三反射面15b反射回全内反射面11d，并在全内反射面11d上再次反射后射向监测透镜19，由监测透镜19准直后射向监测光敏件25，利用监测光敏件25可以监测第一光信号的强度，从而可以监测到VCSEL21的功率，并可根据实际需要调整VCSEL21的功率。At the same time, when the first optical signal passes through the third optical surface 15b, another part of the first optical signal is reflected by the third reflection surface 15b back to the total internal reflection surface 11d, and is reflected again on the total internal reflection surface 11d and directed toward the monitoring The lens 19 is collimated by the monitoring lens 19 and directed toward the monitoring photosensitive member 25. The monitoring photosensitive member 25 can monitor the intensity of the first light signal, so that the power of the VCSEL 21 can be monitored, and the power of the VCSEL 21 can be adjusted according to actual needs.

再者，当VCSEL21发射的第一光信号的强度较大时，利用滤波片16的第二光学面16b可以将部分第一光信号反射出安装槽15外，可以降低进入光纤23中的第一光信号的强度，使得每次进入光纤23中的第一光信号的强度基本一致，提升光纤通信的稳定性。Furthermore, when the intensity of the first optical signal emitted by the VCSEL 21 is relatively high, the second optical surface 16b of the filter 16 can be used to reflect part of the first optical signal out of the installation groove 15, and the first optical signal entering the optical fiber 23 can be reduced. The intensity of the optical signal makes the intensity of the first optical signal that enters the optical fiber 23 basically the same every time, which improves the stability of optical fiber communication.

可以理解的是，在上述光模块中，光纤23可以为多模光纤或单模光纤，而且光纤23可以单根光纤也可以是多根光纤组成的阵列，当光纤23为多根光纤组成的阵列时，光纤透镜14也为多个，其排布方式与多根光纤的排布方式相同。光纤透镜13可以位于光模块的外部，形成用于连接光纤的光纤接口，光纤接口可以为LC/SC接口；也可以将光纤透镜13集成在光模块的内部，即光模块自带光纤接口，例如AOC形式。It is understandable that, in the above-mentioned optical module, the optical fiber 23 can be a multi-mode fiber or a single-mode fiber, and the optical fiber 23 can be a single fiber or an array composed of multiple optical fibers. When the optical fiber 23 is an array composed of multiple optical fibers, At this time, there are also multiple fiber lenses 14, and their arrangement is the same as that of multiple optical fibers. The optical fiber lens 13 can be located outside the optical module to form an optical fiber interface for connecting the optical fiber. The optical fiber interface can be an LC/SC interface; the optical fiber lens 13 can also be integrated inside the optical module, that is, the optical module has its own optical fiber interface, for example AOC form.

本申请实施例还提供了一种光通信设备，该光通信设备包括上述实施例所述的光模块。由于光通信设备包括光模块，因此光通信设备也具有与光模块相同的优点，具体参见上面相关描述，在此不再赘述。An embodiment of the present application also provides an optical communication device, which includes the optical module described in the foregoing embodiment. Since the optical communication device includes an optical module, the optical communication device also has the same advantages as the optical module. For details, please refer to the relevant description above, which will not be repeated here.

以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (24)

1. 一种光学耦合***，其特征在于，包括：光学主体和光转换元件，所述光学主体设有安装槽，所述安装槽具有安装面，所述安装面设有凹槽；所述光转换元件位于所述安装槽内，所述光转换元件具有连接面，所述连接面与所述凹槽周围的所述安装面连接，所述连接面与所述凹槽围成镂空区；An optical coupling system, comprising: an optical body and a light conversion element, the optical body is provided with a mounting groove, the mounting groove has a mounting surface, the mounting surface is provided with a groove; the light conversion element is located In the mounting groove, the light conversion element has a connecting surface, the connecting surface is connected to the mounting surface around the groove, and the connecting surface and the groove enclose a hollow area;

   所述光学主体还设有接收口、输出口和双向通信端口，所述双向通信端口用于输出：自所述接收***入所述光学主体内，并穿过所述光转换元件和所述镂空区的第一光信号；The optical body is also provided with a receiving port, an output port, and a two-way communication port. The two-way communication port is used to output: enter the optical body from the receiving port, and pass through the light conversion element and the The first optical signal in the hollow area;

   所述双向通信端口还用于向所述光学主体内输入第二光信号，所述第二光信号穿过所述镂空区并射至所述光转换元件后由所述输出口输出；所述第二光信号的波长和所述第一光信号的波长不同。The two-way communication port is also used to input a second optical signal into the optical body, and the second optical signal passes through the hollow area and is emitted to the light conversion element and then output from the output port; The wavelength of the second optical signal is different from the wavelength of the first optical signal.
2. 根据权利要求1所述的光学耦合***，其特征在于，所述光学主体具有相对设置的第一侧部边界面和第二侧部边界面，以及位于所述第一侧部边界面和所述第二侧部边界面之间的底部边界面；所述接收口和所述输出口均位于所述底部边界面上，所述双向通信端口位于所述第一侧部边界面上。The optical coupling system according to claim 1, wherein the optical body has a first side boundary surface and a second side boundary surface that are arranged oppositely, and are located between the first side boundary surface and the The bottom boundary surface between the second side boundary surfaces; the receiving port and the output port are both located on the bottom boundary surface, and the two-way communication port is located on the first side boundary surface.
3. 根据权利要求2所述的光学耦合***，其特征在于，所述光学主体设有全内反射面，所述全内反射面用于将自所述接收***入到所述光学主体内的第一光信号全反射至所述光转换元件；The optical coupling system according to claim 2, wherein the optical main body is provided with a total internal reflection surface, and the total internal reflection surface is used to inject the second light from the receiving port into the optical main body. A light signal is totally reflected to the light conversion element;

   所述安装槽和所述光转换元件位于所述全内反射面和所述第一侧部边界面之间。The mounting groove and the light conversion element are located between the total internal reflection surface and the first side boundary surface.
4. 根据权利要求3所述的光学耦合***，其特征在于，所述第二侧部边界面与所述底部边界面之间的夹角为锐角，所述第二侧部边界面形成所述全内反射面；或，The optical coupling system according to claim 3, wherein the angle between the second side boundary surface and the bottom boundary surface is an acute angle, and the second side boundary surface forms the entire inner surface. Reflective surface; or,

   所述第二侧部边界面连接有与所述底部边界面呈锐角的斜面，所述斜面形成所述全内反射面。The second side boundary surface is connected with an inclined surface having an acute angle with the bottom boundary surface, and the inclined surface forms the total internal reflection surface.
5. 根据权利要求3所述的光学耦合***，其特征在于，所述光学主体设有反光槽，所述反光槽位于所述第二侧部边界面和所述安装槽之间，所述反光槽邻近所述安装槽的内侧面形成所述全内反射面。The optical coupling system according to claim 3, wherein the optical body is provided with a reflective groove, the reflective groove is located between the second side boundary surface and the mounting groove, and the reflective groove is adjacent to The inner side surface of the installation groove forms the total internal reflection surface.
6. 根据权利要求2-5任一项所述的光学耦合***，其特征在于，所述双向通信端口包括形成在所述第一侧部边界面上的光纤透镜，所述光纤透镜用于准直经过所述双向通信端口的所述第一光信号和所述第二光信号。The optical coupling system according to any one of claims 2-5, wherein the bidirectional communication port comprises a fiber lens formed on the boundary surface of the first side portion, and the fiber lens is used for collimating The first optical signal and the second optical signal of the bidirectional communication port.
7. 根据权利要求2或6所述的光学耦合***，其特征在于，所述接收口包括形成在所述底部边界面上的接收透镜，所述接收透镜用于准直经过所述接收口的所述第一光信号；The optical coupling system according to claim 2 or 6, wherein the receiving port comprises a receiving lens formed on the bottom boundary surface, and the receiving lens is used to collimate the receiving lens passing through the receiving port. First optical signal;

   所述输出口包括形成在所述底部边界面上的输出透镜，所述输出透镜用于准直经过所述输出口的所述第二光信号。The output port includes an output lens formed on the bottom boundary surface, and the output lens is used to collimate the second optical signal passing through the output port.
8. 根据权利要求2所述的光学耦合***，其特征在于，所述安装面相对所述第一侧部边界面和所述底部边界面倾斜。3. The optical coupling system according to claim 2, wherein the mounting surface is inclined with respect to the first side boundary surface and the bottom boundary surface.
9. 根据权利要求1或8所述的光学耦合***，其特征在于，所述连接面与位于所述凹槽周围的所述安装面之间通过结构胶粘结。The optical coupling system according to claim 1 or 8, wherein the connecting surface and the mounting surface located around the groove are bonded by structural glue.
10. 根据权利要求9所述的光学耦合***，其特征在于，所述结构胶为UV固化型、 热固化型或UV和热双固化型的环氧胶。The optical coupling system according to claim 9, wherein the structural adhesive is a UV curing type, a heat curing type, or a UV and heat dual curing type epoxy adhesive.
11. 根据权利要求1所述的光学耦合***，其特征在于，所述光转换元件包括：The optical coupling system according to claim 1, wherein the light conversion element comprises:

    滤波片，所述滤波片具有相对的第一光学面和第二光学面，所述第一光学面为所述连接面；A filter, the filter having a first optical surface and a second optical surface opposed to each other, the first optical surface being the connecting surface;

    第一功能膜，所述第一功能膜设于所述第一光学面上，用于透过所述第一光信号以及反射所述第二光信号；A first functional film, where the first functional film is disposed on the first optical surface and used to transmit the first optical signal and reflect the second optical signal;

    第二功能膜，所述第二功能膜设于所述第二光学面上，用于透过至少部分所述第一光信号。The second functional film, the second functional film is arranged on the second optical surface, and is used to transmit at least part of the first optical signal.
12. 根据权利要求3或11所述的光学耦合***，其特征在于，所述光学主体还设有监测端口和第三光学面，所述监测端口位于所述接收口和所述输出口之间；The optical coupling system according to claim 3 or 11, wherein the optical body is further provided with a monitoring port and a third optical surface, and the monitoring port is located between the receiving port and the output port;

    所述第三光学面用于使由所述全内反射面全反射至所述第三光学面的第一光信号分为第一部分和第二部分，所述第一部分穿过所述第三光学面射至所述光转换元件；所述第二部分被所述第三光学面反射至所述全内反射面，并经所述全内反射面再次反射后射至所述监测端口输出。The third optical surface is used to divide the first optical signal totally reflected from the total internal reflection surface to the third optical surface into a first part and a second part, and the first part passes through the third optical surface. The surface is emitted to the light conversion element; the second part is reflected by the third optical surface to the total internal reflection surface, and is reflected again by the total internal reflection surface and then emitted to the monitoring port for output.
13. 根据权利要求12所述的光学耦合***，其特征在于，所述第三光学面的法线与射至所述第三光学面的所述第一光信号的中心线呈第一设定角度，以使从所述第三光学面反射回所述全内反射面上的第一光信号在所述全内反射面上的反射点，与从所述接收***至所述全内反射面的第一光信号在所述全内反射面上的反射点错开。The optical coupling system according to claim 12, wherein the normal line of the third optical surface and the center line of the first optical signal incident on the third optical surface are at a first set angle, So that the reflection point of the first optical signal reflected from the third optical surface back to the total internal reflection surface on the total internal reflection surface is different from the reflection point on the total internal reflection surface from the receiving port to the total internal reflection surface. The reflection points of the first optical signal on the total internal reflection surface are staggered.
14. 根据权利要求13所述的光学耦合***，其特征在于，所述第一设定角度为1度-15度。The optical coupling system according to claim 13, wherein the first set angle is 1 degree to 15 degrees.
15. 根据权利要求12所述的光学耦合***，其特征在于，所述监测端口包括形成在所述底部边界面上的监测透镜，所述监测透镜用于准直经过所述监测端口的所述第一光信号。The optical coupling system according to claim 12, wherein the monitoring port comprises a monitoring lens formed on the bottom boundary surface, and the monitoring lens is used for collimating the first monitoring port passing through the monitoring port. Light signal.
16. 根据权利要求1-15任一项所述的光学耦合***，其特征在于，所述凹槽包括第四光学面和第五光学面，所述第四光学面面、所述第五光学面面和所述凹槽的槽口所对应的连接面围成截面形状为三角形的所述镂空区，所述第四光学面用于透过所述第一光信号和所述第二光信号，所述第五光学面用于透过至少部分所述第二光信号。The optical coupling system according to any one of claims 1-15, wherein the groove comprises a fourth optical surface and a fifth optical surface, and the fourth optical surface and the fifth optical surface are The connecting surface corresponding to the notch of the groove encloses the hollow area with a triangular cross-sectional shape, and the fourth optical surface is used to transmit the first optical signal and the second optical signal, so The fifth optical surface is used to transmit at least part of the second optical signal.
17. 根据权利要求16所述的光学耦合***，其特征在于，所述第五光学面的法线与射至所述第五光学面的所述第二光信号的中心线呈第二设定角度，以使从所述第五光学面反射回所述光转换元件上的第二光信号在所述光转换元件上的反射点，与从所述镂空区射至所述光转换元件的第二光信号在所述光转换元件上的反射点错开。The optical coupling system according to claim 16, wherein the normal line of the fifth optical surface and the center line of the second optical signal incident on the fifth optical surface are at a second set angle, In order to make the second light signal reflected from the fifth optical surface back to the light conversion element at the reflection point on the light conversion element, and the second light emitted from the hollow area to the light conversion element The reflection points of the signal on the light conversion element are staggered.
18. 根据权利要求17所述的光学耦合***，其特征在于，所述第二设定角度为1度-15度。The optical coupling system according to claim 17, wherein the second set angle is 1 degree to 15 degrees.
19. 一种光模块，其特征在于，包括：基板，设于所述基板上的驱动单元、发射单元和接收单元，以及如权利要求1-18任一项所述的光学耦合***；An optical module, characterized by comprising: a substrate, a driving unit, a transmitting unit, and a receiving unit provided on the substrate, and the optical coupling system according to any one of claims 1-18;

    所述驱动单元与所述发射单元之间通过信号线连接，用于控制所述发射单元开启或关闭；The driving unit and the transmitting unit are connected by a signal line, and are used to control the turning on or off of the transmitting unit;

    所述发射单元与所述光学耦合***的接收口相对，用于向所述接收口发射第一光信号；The transmitting unit is opposite to the receiving port of the optical coupling system, and is used to transmit the first optical signal to the receiving port;

    所述接收单元与所述光学耦合***的输出口相对，用于接收从所述输出***出的第二光信号，所述第二光信号的波长与所述第一光信号的波长不同。The receiving unit is opposite to the output port of the optical coupling system, and is configured to receive a second optical signal emitted from the output port, and the wavelength of the second optical signal is different from the wavelength of the first optical signal.
20. 根据权利要求19所述的光模块，其特征在于，所述光模块还包括与所述光学耦合***的双向通信端口连接的光传输线路，所述光传输线路用于接收从所述光学耦合***射出的所述第一光信号，以及用于向所述光学耦合***发射所述第二光信号。The optical module according to claim 19, wherein the optical module further comprises an optical transmission line connected to the bidirectional communication port of the optical coupling system, and the optical transmission line is used to receive data from the optical coupling system. The emitted first optical signal is used to emit the second optical signal to the optical coupling system.
21. 根据权利要求20所述的光模块，其特征在于，所述光传输线路为光纤，所述驱动单元为驱动电路，所述发射单元为垂直腔表面发射激光器，所述接收单元为光敏二极管。The optical module according to claim 20, wherein the optical transmission line is an optical fiber, the driving unit is a driving circuit, the emitting unit is a vertical cavity surface emitting laser, and the receiving unit is a photodiode.
22. 根据权利要求19-21任一项所述的光模块，其特征在于，所述光模块还包括设于所述基板上且位于所述发射单元和所述接收单元之间的监测单元，所述监测单元与所述光学耦合***的监测端口相对，用于接收从所述监测端***出的所述第一光信号。The optical module according to any one of claims 19-21, wherein the optical module further comprises a monitoring unit provided on the substrate and located between the transmitting unit and the receiving unit, the The monitoring unit is opposite to the monitoring port of the optical coupling system, and is used for receiving the first optical signal emitted from the monitoring port.
23. 根据权利要求22所述的光模块，其特征在于，所述监测单元为监测光敏件。The optical module according to claim 22, wherein the monitoring unit is a monitoring photosensitive member.
24. 一种光通信设备，其特征在于，包括如权利要求19-23任一项所述的光模块。An optical communication device, characterized by comprising the optical module according to any one of claims 19-23.

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