WO2023134246A1

WO2023134246A1 - Bidirectional optical sub-assembly, optical communication device and system

Info

Publication number: WO2023134246A1
Application number: PCT/CN2022/125800
Authority: WO
Inventors: 李书; 王泽林; 林华枫
Original assignee: 华为技术有限公司
Priority date: 2022-01-11
Filing date: 2022-10-18
Publication date: 2023-07-20
Also published as: CN116466444A

Abstract

A bidirectional optical sub-assembly (400), an optical communication device and a system, which are used for reducing the coupling difficulty of an optical transmitting path and an optical receiving path. The bidirectional optical sub-assembly (400) comprises: a light-emitting chip (401), which is used for providing emergent light; a wavelength division multiplexer (402) which is used for projecting the emergent light onto a first optical axis, and projecting, onto a second optical axis, incident light on the first optical axis, wherein the first optical axis is parallel to the second optical axis; a converging lens (403), which is used for converging, onto a photoelectric detector (404), incident light on the second optical axis, so as to expand an allowable deviation range between the photoelectric detector (404) and the first optical axis; and the photoelectric detector (404), which is used for receiving the converged incident light.

Description

一种光收发组件、光通信设备和***An optical transceiver component, optical communication device and system

本申请要求于2022年1月11日提交中国国家知识产权局、申请号202210028763.1、申请名称为“一种光收发组件、光通信设备和***”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China on January 11, 2022, with application number 202210028763.1, and the application title is "An Optical Transceiver Component, Optical Communication Equipment and System", the entire contents of which are incorporated by reference incorporated in this application.

技术领域technical field

本申请实施例涉及光通信领域，尤其涉及一种光收发组件、光通信设备和***。The embodiments of the present application relate to the field of optical communication, and in particular, to an optical transceiver component, optical communication equipment, and a system.

背景技术Background technique

光组件用于实现光信号的发射和/或接收，光组件包括光发送组件和光接收组件，分别用于实现光信号的发射和接收。在一些使用场景下，需要光组件兼具光发射和光接收的功能，于是出现了光收发组件(bidirectional optical subassembly，BOSA)。光收发组件内部的发射光路和接收光路都与光纤耦合，通过光纤实现光信号的发射和接收。The optical component is used to realize the transmission and/or reception of the optical signal, and the optical component includes an optical sending component and a light receiving component, which are respectively used to realize the transmission and reception of the optical signal. In some usage scenarios, optical components are required to have both the functions of light emission and light reception, so bidirectional optical subassembly (BOSA) appeared. Both the transmitting optical path and the receiving optical path inside the optical transceiver component are coupled with the optical fiber, and the optical signal is transmitted and received through the optical fiber.

在光收发组件内，发光芯片的位置决定了发射光路的光轴位置，光电探测器的位置决定了接收光路的光轴位置。通过控制发光芯片和光电探测器的位置，使得发射光路与接收光路在光纤处同轴，实现发射光路与接收光路的耦合。In the optical transceiver assembly, the position of the light-emitting chip determines the position of the optical axis of the emitting light path, and the position of the photodetector determines the position of the optical axis of the receiving light path. By controlling the positions of the light-emitting chip and the photodetector, the emitting light path and the receiving light path are coaxial at the optical fiber, and the coupling of the emitting light path and the receiving light path is realized.

但是，由于发光芯片和光电探测器可能存在形位公差、器件之间的装配可能存在配合公差，或者其他的偏差都可能导致发射光路与接收光路的耦合难度高、耦合效果差，从而导致发射光路和/或接收光路与光纤的耦合效果差，影响光发送组件的光发射效果和/或光接收效果。However, due to the possible shape and position tolerances of the light-emitting chip and the photodetector, the possible fit tolerances of the assembly between the devices, or other deviations, the coupling of the emitting light path and the receiving light path may be difficult and the coupling effect is poor, resulting in the emission of the light path. And/or the coupling effect between the receiving optical path and the optical fiber is poor, which affects the light emitting effect and/or the light receiving effect of the optical sending component.

发明内容Contents of the invention

本申请实施例提供了一种光收发组件、光通信设备和***。上述设备或***通过扩大光电探测器的容许偏差范围，降低收发光轴的耦合难度。Embodiments of the present application provide an optical transceiver component, an optical communication device, and a system. The above device or system reduces the coupling difficulty of the receiving and receiving optical axes by expanding the allowable deviation range of the photodetector.

第一方面，本申请实施例提供了一种光收发组件。该光收发组件包括发光芯片、波分复用器、会聚透镜和光电探测器。其中，发光芯片用于提供出射光。波分复用器用于将出射光投射至第一光轴上，以及将第一光轴上的入射光投射至第二光轴。其中，第一光轴与第二光轴平行。会聚透镜用于将第二光轴上的入射光会聚至光电探测器。光电探测器用于接收会聚后的入射光。In a first aspect, the embodiment of the present application provides an optical transceiver component. The optical transceiver component includes a light-emitting chip, a wavelength division multiplexer, a converging lens and a photodetector. Wherein, the light-emitting chip is used to provide outgoing light. The wavelength division multiplexer is used to project the outgoing light on the first optical axis, and project the incident light on the first optical axis to the second optical axis. Wherein, the first optical axis is parallel to the second optical axis. The converging lens is used for converging the incident light on the second optical axis to the photodetector. A photodetector is used to receive the converged incident light.

在本申请实施例中，通过会聚透镜将第二光轴上的入射光会聚至光电探测器。通过会聚透镜的会聚作用扩大光电探测器的光敏面与第一光轴之间的容许偏移范围(从ΔWDM+ΔPD扩大至ΔWDM+ΔPD×f，f大于1，详见图5实施例的说明)，降低了对光电探测器和/或发光芯片的装配位置的精度要求。In the embodiment of the present application, the incident light on the second optical axis is converged to the photodetector by a converging lens. Expand the allowable offset range (from ΔWDM+ΔPD to ΔWDM+ΔPD×f between the photosensitive surface of the photodetector and the first optical axis through the converging effect of the converging lens, f is greater than 1, see the description of the embodiment in Figure 5 for details ), which reduces the accuracy requirements for the assembly position of the photodetector and/or light-emitting chip.

在实际生产过程中，由于容许偏差范围的增大，可以放宽对发光芯片和/或光电探测器的装配精度的要求，从而降低对装配设备的精度要求。或者使用本申请实施例提供的BOSA结构，通过较低精度的装配设备即可实现收发光路的耦合，提升BOSA的产品良率。In the actual production process, due to the increase of the allowable deviation range, the requirements on the assembly accuracy of the light-emitting chip and/or the photodetector can be relaxed, thereby reducing the accuracy requirements on the assembly equipment. Alternatively, by using the BOSA structure provided by the embodiment of the present application, the coupling of the receiving and receiving optical circuits can be realized through relatively low-precision assembly equipment, and the product yield of the BOSA can be improved.

在本申请实施例中，通过会聚透镜将第二光轴上的入射光会聚至光电探测器，可以扩大光电探测器与第一光轴之间的容许偏差范围。其中，光电探测器与第一光轴之间的容许偏差范围，为光电探测器的光敏面中心与第一光轴之间的容许偏移距离。第一光轴为光收发组件与光纤耦合的光轴。In the embodiment of the present application, the incident light on the second optical axis is converged to the photodetector by the converging lens, so that the allowable deviation range between the photodetector and the first optical axis can be enlarged. Wherein, the allowable deviation range between the photodetector and the first optical axis is the allowable offset distance between the center of the photosensitive surface of the photodetector and the first optical axis. The first optical axis is the optical axis where the optical transceiver component is coupled with the optical fiber.

在本申请实施例中，通过会聚透镜将第二光轴上的入射光会聚至光电探测器，可以扩大光电探测器的容许偏差范围。其中，光电探测器的容许偏差范围为光电探测器自身的安装位置的容许偏差范围。通过会聚透镜的会聚作用，可以减小入射光在光电探测器上的光斑大小，从而扩大入射光光斑与光电探测器的光敏面边缘之间的距离。光电探测器的安装位置的容许偏差范围即在该距离之内，因此会聚透镜扩大了光电探测器的容许偏差范围(从(x1+x2，y1+y2)扩大至(x1’+x2’，y1’+y2’)，详见图6实施例的说明)。In the embodiment of the present application, the incident light on the second optical axis is converged to the photodetector by the converging lens, so that the allowable deviation range of the photodetector can be expanded. Wherein, the allowable deviation range of the photodetector is the allowable deviation range of the installation position of the photodetector itself. Through the converging effect of the converging lens, the spot size of the incident light on the photodetector can be reduced, thereby expanding the distance between the incident light spot and the edge of the photosensitive surface of the photodetector. The allowable deviation range of the installation position of the photodetector is within this distance, so the converging lens expands the allowable deviation range of the photodetector (from (x1+x2, y1+y2) to (x1'+x2', y1 '+y2'), see the description of the embodiment in Figure 6 for details).

在本申请实施例中，通过会聚透镜将第二光轴上的入射光会聚至光电探测器，可以扩大波分复用器的安装角度的容许偏差范围。如图7所示，若波分复用器的安装角度具有偏差，导致波分复用器无法将入射光处置投射至光电探测器的光敏面上，从而使入射光偏离光敏面，影响光收发组件的光接收效果。通过会聚透镜的会聚作用，将偏离光敏面的入射光会聚至光敏面，实现对波分复用器的安装角度的纠偏，从而扩大了波分复用器的安装角度的容许偏差范围(详见图7实施例的说明)。In the embodiment of the present application, the incident light on the second optical axis is converged to the photodetector by the converging lens, so that the allowable deviation range of the installation angle of the wavelength division multiplexer can be expanded. As shown in Figure 7, if the installation angle of the wavelength division multiplexer has a deviation, the wavelength division multiplexer cannot project the incident light onto the photosensitive surface of the photodetector, so that the incident light deviates from the photosensitive surface, affecting light transmission and reception The light receiving effect of the component. Through the converging effect of the converging lens, the incident light that deviates from the photosensitive surface is converged to the photosensitive surface, and the deviation of the installation angle of the wavelength division multiplexer is realized, thereby expanding the allowable deviation range of the installation angle of the wavelength division multiplexer (see Figure 7 Example illustration).

在本申请实施例中，通过会聚透镜将第二光轴上的入射光会聚至光电探测器，可以扩大所述光电探测器的容许偏差范围与所述发光芯片的容许偏差范围之和。由于波分复用器相对于出射光是45°放置，因此发光芯片在z轴方向上的偏差Δz可以映射至y轴方向上，使得发光芯片的Δz＝Δy(详见图8实施例的说明)。通过会聚透镜扩大了y轴方向上的容许偏差范围，从而扩大了发光芯片在z轴上的容许偏差范围ΔzLD与光电探测器在y轴上的容许偏差范围ΔyPD之和。同理可得，通过会聚透镜扩大了x轴方向上的容许偏差范围，从而扩大了发光芯片在x轴上的容许偏差范围ΔzLD与光电探测器在x轴上的容许偏差范围ΔxPD之和。In the embodiment of the present application, the incident light on the second optical axis is converged to the photodetector by the converging lens, so that the sum of the allowable deviation range of the photodetector and the allowable deviation range of the light-emitting chip can be expanded. Since the wavelength division multiplexer is placed at 45° relative to the outgoing light, the deviation Δz of the light-emitting chip in the z-axis direction can be mapped to the y-axis direction, so that Δz=Δy of the light-emitting chip (see the description of the embodiment in Figure 8 for details ). The allowable deviation range in the y-axis direction is expanded by the converging lens, thereby expanding the sum of the allowable deviation range ΔzLD of the light-emitting chip on the z-axis and the allowable deviation range ΔyPD of the photodetector on the y-axis. In the same way, the allowable deviation range in the x-axis direction is expanded by the converging lens, thereby expanding the sum of the allowable deviation range ΔzLD of the light-emitting chip on the x-axis and the allowable deviation range ΔxPD of the photodetector on the x-axis.

在一种可选的实现方式中，光收发组件还包括滤波器。该滤波器用于过滤会聚前或会聚后的入射光，使得入射光电探测器的会聚后的入射光在目标波长范围内。In an optional implementation manner, the optical transceiver component further includes a filter. The filter is used to filter the incident light before or after convergence, so that the incident light after convergence entering the photodetector is within the target wavelength range.

在本申请实施例中，由于来自光纤的入射光可能是多光源共光纤传输的光信号，包括了各种波长的光信号；或者在入射光电探测器的光信号中混入了部分出射光(波分复用器在反射出射光的过程中可能将部分出射光折射至第二光轴上，即入射光的光路上)；诸如此类的因素导致入射光中可能存在噪声信号。因此通过滤波器滤除目标波长范围之外的信号，提升光电探测器所接收的入射光的信噪比。In the embodiment of the present application, since the incident light from the optical fiber may be the optical signal transmitted by multiple light sources through the optical fiber, it includes optical signals of various wavelengths; or a part of the outgoing light (wavelength In the process of reflecting the outgoing light, the demultiplexer may refract part of the outgoing light to the second optical axis, that is, the optical path of the incident light); factors such as these may cause noise signals in the incident light. Therefore, the signal outside the target wavelength range is filtered out by the filter, and the signal-to-noise ratio of the incident light received by the photodetector is improved.

在一种可选地实现方式中，滤波器位于波分复用器与会聚透镜之间的光路上。该滤波器用于过滤会聚前的入射光，使得入射会聚透镜的入射光在目标波长范围内。In an optional implementation manner, the filter is located on the optical path between the wavelength division multiplexer and the converging lens. The filter is used to filter the incident light before converging, so that the incident light entering the converging lens is within the target wavelength range.

在本申请实施例中，将滤波器放置在会聚透镜之前的光路上，可以减小会聚透镜之后的光程。在相同的会聚透镜(放大率)下会聚效果更好，对应的光收发组件的收发光路的耦合效果也就更好。In the embodiment of the present application, placing the filter on the optical path before the converging lens can reduce the optical path behind the converging lens. Under the same converging lens (magnification), the converging effect is better, and the coupling effect of the receiving and receiving optical circuits of the corresponding optical receiving and receiving components is also better.

另一方面，将滤波器放置在会聚透镜之前的光路上，在相同的会聚效果下可以减小会聚透镜的放大率。由于会聚透镜的放大率大小与尺寸大小相关，因此可以减小会聚透镜的体积，从而减小整个光收发组件的体积。On the other hand, placing the filter on the optical path before the converging lens can reduce the magnification of the converging lens under the same converging effect. Since the magnification of the converging lens is related to its size, the volume of the converging lens can be reduced, thereby reducing the volume of the entire optical transceiver assembly.

在一种可选的实现方式中，滤波器位于会聚透镜与光电探测器之间的光路上。该滤波器用于过滤会聚后的入射光，使得入射光电探测器的会聚后的入射光在目标波长范围内。In an optional implementation manner, the filter is located on the optical path between the converging lens and the photodetector. The filter is used to filter the condensed incident light, so that the condensed incident light incident on the photodetector is within the target wavelength range.

在一种可选的实现方式中，滤波器为滤波片，或者为会聚透镜表面上的滤波膜。In an optional implementation manner, the filter is a filter, or a filter film on the surface of the converging lens.

在一种可选的实现方式中，光收发组件还包括与会聚透镜相连的支撑结构以及底座。其中，支撑结构用于承载波分复用器。底座用于承载发光芯片、光电探测器和支撑结构。In an optional implementation manner, the optical transceiver assembly further includes a support structure connected to the converging lens and a base. Wherein, the support structure is used to carry the wavelength division multiplexer. The base is used to carry light-emitting chips, photodetectors and supporting structures.

在本申请实施例中，通过与会聚透镜相连的支撑结构支撑波分复用器，使波分复用器和会聚透镜(以及可能存在的滤波器)集成在一个相连的结构上，实现一体化结构，可以减小波分复用器和会聚透镜(以及可能存在的滤波器)总体所占的体积，从而减小整个光收发组件的体积。并且，相较于波分复用器和会聚透镜(以及可能存在的滤波器)相互独立的结构，一体化结构不需要对零散的波分复用器、会聚透镜和滤波器进行装配。使得结构更简单，封装过程更简便，降低了光收发组件的生产制造成本。In the embodiment of the present application, the wavelength division multiplexer is supported by a support structure connected to the converging lens, so that the wavelength division multiplexer and the converging lens (and possible filters) are integrated on a connected structure to achieve integration The structure can reduce the overall volume occupied by the wavelength division multiplexer and the converging lens (and possible filters), thereby reducing the volume of the entire optical transceiver assembly. Moreover, compared with the structure in which the wavelength division multiplexer and the converging lens (and possible filters) are independent of each other, the integrated structure does not need to assemble scattered wavelength division multiplexers, converging lenses and filters. The structure is simpler, the packaging process is simpler, and the manufacturing cost of the optical transceiver assembly is reduced.

在一种可选的实现方式中，支撑结构包括一个或多个斜面。该一个或多个斜面用于支撑波分复用器。In an optional implementation, the support structure includes one or more slopes. The one or more slopes are used to support the wavelength division multiplexer.

在本申请实施例中，通过斜面支撑波分复用器。波分复用器的支撑面积大，减小了光收发组件中各部件的受力，从而减小各部件变形的可能，提升了结构的稳固性。In the embodiment of the present application, the wavelength division multiplexer is supported by an inclined plane. The supporting area of the wavelength division multiplexer is large, which reduces the stress on each component in the optical transceiver assembly, thereby reducing the possibility of deformation of each component and improving the stability of the structure.

第二方面，本申请实施例提供了一种光网络单元。该光网络单元包括第一方面所述的光收发组件。In a second aspect, the embodiment of the present application provides an optical network unit. The optical network unit includes the optical transceiver component described in the first aspect.

第三方面，本申请实施例提供了一种无源光网络***。该无源光网络***包括光线路终端、光分布网络和第二方面所述的光网络单元。其中，光线路终端与光分布网络连接。光分布网络与光网络单元连接。In a third aspect, the embodiment of the present application provides a passive optical network system. The passive optical network system includes an optical line terminal, an optical distribution network and the optical network unit described in the second aspect. Wherein, the optical line terminal is connected with the optical distribution network. The optical distribution network is connected with the optical network unit.

第二方面和第三方面的有益效果参见第一方面，此处不再赘述。For the beneficial effects of the second aspect and the third aspect, please refer to the first aspect, which will not be repeated here.

附图说明Description of drawings

图1为无源光网络的网络设备配置图；Fig. 1 is a network device configuration diagram of a passive optical network;

图2a为一种光收发组件的封装结构示意图；FIG. 2a is a schematic diagram of a packaging structure of an optical transceiver component;

图2b为小型化光收发组件的封装结构示意图；Fig. 2b is a schematic diagram of a package structure of a miniaturized optical transceiver component;

图3为光收发组件的收发光路的耦合示意图；Fig. 3 is a coupling schematic diagram of the transceiver optical circuit of the optical transceiver component;

图4为本申请实施例提供的光收发组件的结构示意图；FIG. 4 is a schematic structural diagram of an optical transceiver assembly provided in an embodiment of the present application;

图5为本申请实施例提供的光收发组件的收发光路耦合示意图；FIG. 5 is a schematic diagram of the optical transceiver optical circuit coupling of the optical transceiver assembly provided by the embodiment of the present application;

图6为本申请实施例提供的光收发组件的容许偏差范围ΔPD的示意图；FIG. 6 is a schematic diagram of the allowable deviation range ΔPD of the optical transceiver component provided by the embodiment of the present application;

图7为本申请实施例提供的光收发组件的纠偏效果示意图；Fig. 7 is a schematic diagram of the deviation correction effect of the optical transceiver assembly provided by the embodiment of the present application;

图8为本申请实施例提供的光收发组件在y轴和z轴上的容许偏差范围示意图；Fig. 8 is a schematic diagram of the allowable deviation range of the optical transceiver assembly provided by the embodiment of the present application on the y-axis and the z-axis;

图9为本申请实施例提供的另一光收发组件的结构示意图；FIG. 9 is a schematic structural diagram of another optical transceiver component provided by an embodiment of the present application;

图10为本申请实施例提供的带有滤波器的光收发组件的结构示意图；FIG. 10 is a schematic structural diagram of an optical transceiver component with a filter provided in an embodiment of the present application;

图11为本申请实施例提供的带有滤波器的光收发组件的封装结构示意图；FIG. 11 is a schematic diagram of the packaging structure of an optical transceiver assembly with a filter provided in an embodiment of the present application;

图12为图11所示的光收发组件中的支撑结构的示意图；FIG. 12 is a schematic diagram of a support structure in the optical transceiver assembly shown in FIG. 11;

图13为本申请实施例提供的带有滤波器的另一光收发组件的封装结构示意图；Fig. 13 is a schematic diagram of the packaging structure of another optical transceiver component with a filter provided by the embodiment of the present application;

图14为图13所示的光收发组件中的支撑结构的示意图；FIG. 14 is a schematic diagram of a support structure in the optical transceiver assembly shown in FIG. 13;

图15为本申请实施例无源光网络***的组网结构图。FIG. 15 is a network structure diagram of a passive optical network system according to an embodiment of the present application.

具体实施方式Detailed ways

应用于接入网场景的光通信网主要以无源光网络(passive optical network，PON)的形式存在。在光网络全面普及的整体形势之下，大量PON网络的铺设，需要用到数量同样巨大的通信设备。相关的通信设备如光网络单元(optical network unit，ONU)等，主要由光收发组件(bi-directional optical sub-assembly，BOSA)及放置光收发组件的单板及机框组成。The optical communication network applied to the access network scenario mainly exists in the form of a passive optical network (PON). Under the overall situation that the optical network is fully popularized, the laying of a large number of PON networks requires the use of an equally huge number of communication equipment. Relevant communication equipment, such as optical network unit (ONU), etc., mainly consists of optical transceiver components (bi-directional optical sub-assembly, BOSA), single boards and chassis for placing optical transceiver components.

如图1所示，光线路终端01内的一个光模块对应一个光纤分布网络(optical distribution network，ODN)02，并服务一定数目的光网络单元ONU 03。图1中一个光纤分布网络02对应x个光网络单元03(ONU1～ONUx)，每个光网络单元03可以表示一个用户。作为光网络中的关键构成，光网络单元03设备里面的光收发组件担负着将网络信号进行光电转换及传输的任务，是整个网络能够正常通信的基础。As shown in FIG. 1, an optical module in the optical line terminal 01 corresponds to an optical distribution network (ODN) 02, and serves a certain number of optical network units ONU 03. In FIG. 1, one optical fiber distribution network 02 corresponds to x optical network units 03 (ONU1-ONUx), and each optical network unit 03 can represent a user. As a key component of the optical network, the optical transceiver components in the optical network unit 03 are responsible for the photoelectric conversion and transmission of network signals, which is the basis for the normal communication of the entire network.

在图1所示的PON网络中，光收发组件BOSA的一种结构如图2a所示。BOSA包括光发送组件(transmitting optical sub-assembly，TOSA)、光接收组件(receiving optical sub-assembly，ROSA)和波分复用器。其中，光发送组件TOSA的作用是将电信号转化为光信号，并输入光纤进行传输。光接收组件ROSA的作用是接收由光纤传入的光信号，并对其进行电信号转化。一般情况下，由于发送和接收的光的波长不同，因此通过波分复用器分离这两类波长。波分复用器的功能是：透射某些波长的光，同时反射其他波长的光。In the PON network shown in FIG. 1, a structure of the optical transceiver component BOSA is shown in FIG. 2a. The BOSA includes a transmitting optical sub-assembly (TOSA), a receiving optical sub-assembly (ROSA) and a wavelength division multiplexer. Among them, the role of the optical sending component TOSA is to convert electrical signals into optical signals, and input them into optical fibers for transmission. The role of the optical receiving component ROSA is to receive the optical signal introduced by the optical fiber and convert it into an electrical signal. In general, since the wavelengths of transmitted and received light are different, the two types of wavelengths are separated by a wavelength division multiplexer. The function of a wavelength division multiplexer is to transmit certain wavelengths of light while reflecting other wavelengths of light.

光发送路径如图2a中实线箭头所示，光发送组件TOSA发出的光经过波分复用器时直线透射，然后进入光纤传输。光接收路径ROSA如图2a中虚线箭头所示，光纤传入的光信号经过波分复用器时发生反射，光接收组件ROSA正好位于反射光路上，从而实现光信号的接收。The optical transmission path is shown by the solid arrow in Figure 2a. The light emitted by the optical transmission component TOSA passes through the wavelength division multiplexer in a straight line, and then enters the optical fiber for transmission. The optical receiving path ROSA is shown by the dotted arrow in Figure 2a. The optical signal transmitted by the optical fiber is reflected when it passes through the wavelength division multiplexer. The optical receiving component ROSA is just located on the reflected optical path, thereby realizing the reception of the optical signal.

在工业、小型化光纤到房间(fibre to the room，FTTR)等场景中，对光收发组件BOSA的体积要求越来越高。而传统的BOSA结构中包括独立封装的TOSA和ROSA。对独立封装的TOSA和ROSA再进行封装，所得的BOSA体积较大。In industrial and miniaturized fiber to the room (FTTR) scenarios, the volume requirements for the optical transceiver component BOSA are getting higher and higher. The traditional BOSA structure includes independently packaged TOSA and ROSA. If the independently packaged TOSA and ROSA are packaged again, the resulting BOSA has a larger volume.

因此提出了如图2b所示的BOSA结构。在该BOSA结构中，不对TOSA和BOSA进行单独的封装。而是将TOSA和BOSA中的结构封装在同一个晶体管外形(transistor outline，TO)内，从而减小BOSA的体积。具体地，将TOSA中的发光芯片、ROSA中的光电探测器和波分复用器封装在同一个TO中。并将出射光和入射光的光路轴心耦合到光纤轴心上(即，将出射光和入射光的光路轴心对准光纤轴心)，实现出射光和入射光的传输。Therefore, a BOSA structure as shown in Fig. 2b is proposed. In this BOSA structure, TOSA and BOSA are not separately packaged. Instead, the structures in TOSA and BOSA are packaged in the same transistor outline (TO), thereby reducing the volume of BOSA. Specifically, the light-emitting chip in TOSA, the photodetector in ROSA and the wavelength division multiplexer are packaged in the same TO. And the axis of the optical path of the outgoing light and the incident light is coupled to the axis of the fiber (that is, the axis of the optical path of the outgoing light and the incident light is aligned with the axis of the fiber), so as to realize the transmission of the outgoing light and the incident light.

由于发光芯片和光电探测器可能存在形位公差、器件之间的装配可能存在配合公差，或者其他的偏差都可能导致出射光光路与入射光光路的耦合效果差。从而导致出射光光路和入射光光路与光纤轴心的耦合效果差，影响光收发组件的光发射效果和/或光接收效果。Due to possible shape and position tolerances of light-emitting chips and photodetectors, possible fit tolerances between devices, or other deviations, the coupling effect between the outgoing light path and the incident light path may be poor. As a result, the coupling effect between the outgoing light path and the incident light path and the axis of the optical fiber is poor, which affects the light emitting effect and/or light receiving effect of the optical transceiver component.

发光芯片和光电探测器都具有一定的容许偏差范围。对于发光芯片来说，只要出射光的轴心与光纤轴心之间的实际误差在该范围内，则可以确保BOSA的光发射效果。对于光电探测器来说，只要入射光的轴心与光电探测器的光敏面中心之间的实际误差在该范围内，则可以确保BOSA的光接收效果。通常来说，发光芯片的容许偏差范围远小于光电探测器的容许偏差范围。因此为了保证发光芯片的出射光能与光纤轴心耦合，通常以发光芯片的出射光轴心为准进行收发光路的耦合，确保BOSA的光发射效果。基于此，再通过控制入射光轴心与光电探测器光敏面中心之间的偏差在光电探测器的容许偏差范围内，确保BOSA的光接收效果。Both light-emitting chips and photodetectors have a certain tolerance range. For the light-emitting chip, as long as the actual error between the axis of the outgoing light and the axis of the optical fiber is within this range, the light emission effect of the BOSA can be guaranteed. For the photodetector, as long as the actual error between the axis of the incident light and the center of the photosensitive surface of the photodetector is within this range, the light receiving effect of the BOSA can be ensured. Generally speaking, the allowable deviation range of the light-emitting chip is much smaller than that of the photodetector. Therefore, in order to ensure that the output light energy of the light-emitting chip is coupled with the axis of the optical fiber, the coupling of the receiving and receiving optical circuits is usually performed based on the axis of the output light of the light-emitting chip to ensure the light emission effect of the BOSA. Based on this, by controlling the deviation between the axis of the incident light and the center of the photosensitive surface of the photodetector within the allowable deviation range of the photodetector, the light receiving effect of the BOSA is ensured.

以图3为例，图3通过实线表示理想位置和理想光路，通过虚线表示上述偏差导致的实际位置和实际光路。假设发光芯片的实际位置比理想位置更靠上，则出射光通过波分复用器反射至光纤，光纤为了对齐出射光的光轴，导致实际位置比理想位置更靠左。光纤比理想位置靠左，导致入射光的位置也比理想光路靠左。靠左的入射光照射到光电探测器上，可能偏离光电探测器的光敏面。当入射光的轴心与光电探测器的光敏面中心之间的距离大于容许偏差范围，则可能导致光电探测器无法接收来自光纤的光信号，或者只能接收到来自光纤的部分光信号(即入射光的光斑只有一部分被光敏面接收)，从而影响BOSA的光接收效果。Taking Fig. 3 as an example, Fig. 3 represents the ideal position and ideal optical path through the solid line, and represents the actual position and the actual optical path caused by the above-mentioned deviation through the dotted line. Assuming that the actual position of the light-emitting chip is higher than the ideal position, the outgoing light is reflected to the optical fiber through the wavelength division multiplexer, and the optical fiber is aligned with the optical axis of the outgoing light, resulting in the actual position being further to the left than the ideal position. The optical fiber is located to the left of the ideal, causing the incident light to be located to the left of the ideal optical path. Incident light to the left impinges on the photodetector, which may deviate from the photosensitive surface of the photodetector. When the distance between the axis of the incident light and the center of the photosensitive surface of the photodetector is greater than the allowable deviation range, the photodetector may not be able to receive the optical signal from the optical fiber, or may only be able to receive part of the optical signal from the optical fiber (ie Only a part of the incident light spot is received by the photosensitive surface), which affects the light receiving effect of BOSA.

值得注意的是，图3所示实施例是以发光芯片向一个方向的偏移为例说明偏差导致对BOSA的光接收效果的影响，并不造成对本申请实施例所适用场景的限定。例如，光电探测器的位置偏移可能导致入射光轴心偏离光敏面中心，从而造成对BOSA的光接收效果的影响；或者，波分复用器的位置偏移或角度偏差可能改变入射光入射至光电探测器的位置，从而造成对BOSA的光接收效果的影响；或者，在以光电探测器的光敏面中心为准进行收发光路耦合的情况下，则上述任一偏移或偏差都可能导致基于光敏面中心确定出的光纤轴心与出射光轴心之间的偏差大于容许偏差范围，从而导致对BOSA的光发射效果的影响等，本申请对此不做限定。It should be noted that the embodiment shown in FIG. 3 takes the shift of the light-emitting chip in one direction as an example to illustrate the impact of the deviation on the light receiving effect of the BOSA, and does not limit the applicable scenarios of the embodiment of the present application. For example, the positional deviation of the photodetector may cause the axis of the incident light to deviate from the center of the photosensitive surface, thereby affecting the light receiving effect of the BOSA; or, the positional deviation or angular deviation of the wavelength division multiplexer may change the incident light to the position of the photodetector, thereby affecting the light-receiving effect of the BOSA; or, in the case of receiving and receiving optical circuit coupling based on the center of the photosensitive surface of the photodetector, any of the above-mentioned offsets or deviations may cause The deviation between the axis of the optical fiber determined based on the center of the photosensitive surface and the axis of the outgoing light is greater than the allowable deviation range, which may affect the light emission effect of the BOSA, which is not limited in the present application.

为了解决上述缺陷，本申请实施例提出了一种光收发组件。如图4所示，本申请实施例提出的光收发组件400包括发光芯片401、波分复用器(wavelength division multiplexing，WDM)402、会聚透镜403和光电探测器404。In order to solve the above defects, an embodiment of the present application proposes an optical transceiver component. As shown in FIG. 4 , the optical transceiver assembly 400 proposed in the embodiment of the present application includes a light emitting chip 401 , a wavelength division multiplexer (wavelength division multiplexing, WDM) 402 , a converging lens 403 and a photodetector 404 .

其中，发光芯片401用于提供出射光。波分复用器402用于将出射光投射至第一光轴上，并将第一光轴上的入射光投射至第二光轴上。具体地，波分复用器402将出射光反射至第一光轴上，并将第一光轴上的入射光折射后投射至与第一光轴平行的第二光轴上。Wherein, the light emitting chip 401 is used to provide outgoing light. The wavelength division multiplexer 402 is used to project the outgoing light onto the first optical axis, and project the incident light on the first optical axis onto the second optical axis. Specifically, the wavelength division multiplexer 402 reflects the outgoing light onto the first optical axis, refracts the incident light on the first optical axis, and projects it onto a second optical axis parallel to the first optical axis.

在本申请实施例中，第一光轴为光收发组件400与光纤的耦合光轴。即，在光收发组件400与光纤耦合的时候，使光纤光轴对齐第一光轴。In the embodiment of the present application, the first optical axis is the coupling optical axis between the optical transceiver assembly 400 and the optical fiber. That is, when the optical transceiver assembly 400 is coupled with the optical fiber, the optical axis of the optical fiber is aligned with the first optical axis.

会聚透镜403用于将第二光轴上的入射光会聚至光电探测器404，以扩大光电探测器与第一光轴之间的容许偏差范围。光电探测器404用于接收会聚后的入射光。The converging lens 403 is used for converging the incident light on the second optical axis to the photodetector 404 to expand the allowable deviation range between the photodetector and the first optical axis. The photodetector 404 is used to receive the converged incident light.

在本申请实施例中，发光芯片也称为激光二极管(laser diode，LD)。光电探测器也称为光电二极管(photodiode，PD)，本申请对此不做限定。In the embodiment of the present application, the light emitting chip is also called a laser diode (laser diode, LD). The photodetector is also called a photodiode (photodiode, PD), which is not limited in this application.

需要说明的是，波分复用器402可以是石英基底的镀膜片、高聚物基底的镀膜片等。发光芯片401可以是法布里-珀罗(fabry-perot，FP)激光器、分布反馈式(distribute feedback，DFB)激光器或电吸收调制激光器(electro-absorption modulated laser，EML)等。光电探测器404可以是光电二极管(photodiode，PD)、雪崩二极管(avalanche photodiode，APD)等。会聚透镜403可以是球面透镜、非球面透镜等。本申请对此不做限定。It should be noted that the wavelength division multiplexer 402 may be a coated film of a quartz substrate, a film coated film of a polymer substrate, or the like. The light-emitting chip 401 may be a Fabry-Perot (fabry-perot, FP) laser, a distributed feedback (distribute feedback, DFB) laser, or an electro-absorption modulated laser (electro-absorption modulated laser, EML), etc. The photodetector 404 may be a photodiode (photodiode, PD), an avalanche diode (avalanche photodiode, APD) or the like. The converging lens 403 may be a spherical lens, an aspheric lens, or the like. This application does not limit this.

上面说明了本申请实施例提供的光收发组件400的结构，下面将展开说明光收发组件400中设置会聚透镜403的多种有益效果。The structure of the optical transceiver assembly 400 provided by the embodiment of the present application is described above, and various beneficial effects of setting the converging lens 403 in the optical transceiver assembly 400 will be described below.

一方面，会聚透镜403可以扩大光电探测器与第一光轴(光纤耦合光轴)之间的容许偏差范围。如图5所示，出射光照射到波分复用器402上的位置决定了第一光轴的位置。光收发组件400耦合的光纤，其轴心与第一光轴完全对齐。因此出射光照射到波分复用器402上的位置，也就决定了与光收发组件400耦合的光纤的轴心位置。On the one hand, the converging lens 403 can expand the allowable deviation range between the photodetector and the first optical axis (fiber coupling optical axis). As shown in FIG. 5 , the position where the outgoing light hits the wavelength division multiplexer 402 determines the position of the first optical axis. The axis of the optical fiber coupled with the optical transceiver assembly 400 is completely aligned with the first optical axis. Therefore, the position where the outgoing light irradiates the wavelength division multiplexer 402 also determines the axis position of the optical fiber coupled with the optical transceiver assembly 400 .

波分复用器402的折射率和厚度决定了第二光轴相对于第一光轴的偏移距离，该距离在本申请实施例中称为ΔWDM。第二光轴决定了入射光直接照射到光敏探测器404的位置。只要第二光轴与光电探测器404的光敏面中心之间的距离在光敏探测器404的容许偏移范围ΔPD之内，即可保证光电探测器404对入射光的接收效果。因此，光电探测器的光敏面中心与第一光轴之间的容许偏差范围为ΔWDM+ΔPD。The refractive index and thickness of the wavelength division multiplexer 402 determine the offset distance of the second optical axis relative to the first optical axis, which is referred to as ΔWDM in the embodiment of the present application. The second optical axis determines where the incident light directly strikes the photosensitive detector 404 . As long as the distance between the second optical axis and the center of the photosensitive surface of the photodetector 404 is within the allowable deviation range ΔPD of the photodetector 404 , the photodetector 404 can ensure the receiving effect of the incident light. Therefore, the allowable deviation range between the center of the photosensitive surface of the photodetector and the first optical axis is ΔWDM+ΔPD.

如图5所示，在波分复用器402与光电探测器404之间加了会聚透镜403后，入射光直接照射到光敏探测器404的位置与光电探测器404光敏面中心之间的容许偏移范围依然是ΔPD。而第二光轴上的入射光经过会聚透镜403的会聚，照射到光电探测器404上的位置更靠近与光敏面中心，因此第二光轴上的入射光与光敏面中心之间的容许偏移范围为ΔPD×f，其中f为会聚透镜403的放大率，f大于1。因此，在增加了会聚透镜403的光收发组件400结构中，将光收发组件与光纤的耦合轴心(即第一光轴)，与光电探测器的光敏面中心之间的容许偏差范围，从ΔWDM+ΔPD扩大到ΔWDM+ΔPD×f，降低了对光电探测器和/或发光芯片的装配位置的精度要求。As shown in Figure 5, after adding a converging lens 403 between the wavelength division multiplexer 402 and the photodetector 404, the allowable distance between the position where the incident light directly irradiates the photosensitive detector 404 and the center of the photosensitive surface of the photodetector 404 The offset range is still ΔPD. The incident light on the second optical axis is converged by the converging lens 403, and the position irradiated on the photodetector 404 is closer to the center of the photosensitive surface, so the allowable deviation between the incident light on the second optical axis and the center of the photosensitive surface The shift range is ΔPD×f, where f is the magnification of the converging lens 403, and f is greater than 1. Therefore, in the optical transceiver assembly 400 structure that has increased converging lens 403, the allowable deviation range between the coupling axis (i.e. the first optical axis) of the optical transceiver assembly and the optical fiber and the center of the photosensitive surface of the photodetector is from ΔWDM+ΔPD is expanded to ΔWDM+ΔPD×f, which lowers the accuracy requirement on the assembly position of photodetectors and/or light emitting chips.

在实际生产过程中，由于容许偏差范围的增大，可以放宽对发光芯片和/或光电探测器的装配精度的要求，从而降低对装配设备的精度要求。或者使用本申请实施例提供的BOSA结构，通过较低精度的装配设备即可实现收发光路的耦合，提升产品良率。In the actual production process, due to the increase of the allowable deviation range, the requirements on the assembly accuracy of the light-emitting chip and/or the photodetector can be relaxed, thereby reducing the accuracy requirements on the assembly equipment. Alternatively, by using the BOSA structure provided by the embodiment of the present application, the coupling of the receiving and receiving optical circuits can be realized through relatively low-precision assembly equipment, and the product yield rate can be improved.

在图5所示的光路中，光纤轴心与第一光轴完全对齐。需要说明的是，光纤轴心与第一光轴之间也可以相差发光芯片的容许偏差范围ΔLD，在ΔLD之内，可以保证BOSA的光发射效果，光信号的损失较小，本申请对此不做限定。In the optical path shown in Fig. 5, the axis of the optical fiber is completely aligned with the first optical axis. It should be noted that the difference between the optical fiber axis and the first optical axis may also be within the allowable deviation range ΔLD of the light-emitting chip. Within ΔLD, the light emission effect of BOSA can be guaranteed, and the loss of optical signals is small. No limit.

会聚透镜403一方面可以扩大光电探测器与第一光轴之间的容许偏差范围，另一方面也可以增大光电探测器本身的容许偏差范围(即图5中所示的ΔPD)。如图6所示，通过会聚透镜，可以减小入射光光斑的大小。从而扩大入射光光斑与光敏面边缘之间的距离，进而将光电探测器的容许偏差范围ΔPD从(x1+x2，y1+y2)扩大至(x1’+x2’，y1’+y2’)。The converging lens 403 can expand the allowable deviation range between the photodetector and the first optical axis on the one hand, and can also increase the allowable deviation range of the photodetector itself (ie, ΔPD shown in FIG. 5 ). As shown in Figure 6, through the converging lens, the size of the incident light spot can be reduced. Thereby expanding the distance between the incident light spot and the edge of the photosensitive surface, thereby expanding the allowable deviation range ΔPD of the photodetector from (x1+x2, y1+y2) to (x1'+x2', y1'+y2').

光电探测器的位置偏移可能导致入射光轴心距离光敏面中心较远，从而影响BOSA的光接收效果。则通过图6所示的对ΔPD的扩大，可以使偏离的距离落在ΔPD范围内，从而保证BOSA的光接收效果，提升BOS的产品良率。倒推回来，在保证BOSA的光接收效果的前提下，通过本申请实施例提供的BOSA结构可以扩大ΔPD，即扩大光电探测器的容许偏差范围。从而降低对装配设备的精度要求。The positional deviation of the photodetector may cause the center of the incident light axis to be far from the center of the photosensitive surface, thereby affecting the light receiving effect of BOSA. Then, by enlarging ΔPD as shown in FIG. 6 , the deviation distance can be made within the range of ΔPD, thereby ensuring the light receiving effect of BOSA and improving the product yield of BOS. Backwards, on the premise of ensuring the light receiving effect of the BOSA, the BOSA structure provided by the embodiment of the present application can expand ΔPD, that is, expand the allowable deviation range of the photodetector. Thereby reducing the accuracy requirements for assembly equipment.

可选地，图5所示的效果和图6所示的效果也可以叠加。通过图5所示实施例的说明，可知本申请实施例提供的光收发组件400将光电探测器与第一光轴之间的容许偏差范围从ΔPD扩大到ΔPD×f。而图6所示实施例所说明的会聚透镜403对ΔPD的扩大，进一步增强了对光电探测器与第一光轴之间的容许偏差范围的扩大效果。从而进一步降低对装配设备的精度要求、提升产品良率。Optionally, the effects shown in FIG. 5 and the effects shown in FIG. 6 may also be superimposed. Through the description of the embodiment shown in FIG. 5 , it can be seen that the optical transceiver assembly 400 provided by the embodiment of the present application expands the allowable deviation range between the photodetector and the first optical axis from ΔPD to ΔPD×f. The expansion of ΔPD by the converging lens 403 described in the embodiment shown in FIG. 6 further enhances the effect of expanding the allowable deviation range between the photodetector and the first optical axis. Thereby further reducing the accuracy requirements for assembly equipment and improving product yield.

通过本申请实施例提供的光收发组件结构，除了扩大光电探测器与第一光轴之间的容许偏差范围和ΔPD，还可以通过会聚透镜对波分复用器的角度进行纠偏，使入射光会聚投射至光电探测器的光敏面上，从而扩大波分复用器的安装角度的容许偏差范围。Through the optical transceiver assembly structure provided by the embodiment of the present application, in addition to expanding the allowable deviation range and ΔPD between the photodetector and the first optical axis, the angle of the wavelength division multiplexer can also be corrected through the converging lens, so that the incident light The converging projection is projected onto the photosensitive surface of the photodetector, thereby expanding the allowable deviation range of the installation angle of the wavelength division multiplexer.

如图7所示，波分复用器402处于理想角度的情况下，出射光以45°角射入波分复用器。经波分复用器402的反射，射入光纤的出射光与出射发光芯片401的出射光之间呈90°夹角。光电探测器404的光敏面与出射发光芯片401的出射光平行，而波分复用器402对入射光的折射并不改变入射光的方向。因此来自光纤的入射光经波分复用器402折射后垂直射入光电探测器404的光敏面。As shown in FIG. 7 , when the wavelength division multiplexer 402 is at an ideal angle, the outgoing light enters the wavelength division multiplexer at an angle of 45°. Reflected by the wavelength division multiplexer 402 , an included angle of 90° is formed between the outgoing light entering the optical fiber and the outgoing light exiting the light-emitting chip 401 . The photosensitive surface of the photodetector 404 is parallel to the light emitted from the light-emitting chip 401 , and the refraction of the incident light by the wavelength division multiplexer 402 does not change the direction of the incident light. Therefore, the incident light from the optical fiber is refracted by the wavelength division multiplexer 402 and then vertically enters the photosensitive surface of the photodetector 404 .

如图7所示，若WDM 402与出射光之间的夹角∠A小于45°，则出射光以大于45°的夹角入射WDM 402。因此射入光纤的出射光与出射发光芯片401的出射光之间呈大于 90°的夹角。由上述说明可知来自光纤的入射光射入光电探测器404的方向，平行于射入光纤的出射光的方向。导致入射光无法垂直射入光电探测器404的光敏面，从而使入射光偏离光敏面影响BOSA的光接收效果。同理可知，WDM 402与出射光之间的夹角∠B大于45°的情况下，入射光也无法垂直射入光电探测器404的光敏面，也会使入射光偏离光敏面影响BOSA的光接收效果。As shown in FIG. 7, if the included angle ∠A between the WDM 402 and the outgoing light is less than 45°, the outgoing light enters the WDM 402 at an included angle larger than 45°. Therefore, the angle between the outgoing light entering the optical fiber and the outgoing light exiting the light-emitting chip 401 is greater than 90°. From the above description, it can be seen that the direction of the incident light from the optical fiber entering the photodetector 404 is parallel to the direction of the outgoing light entering the optical fiber. As a result, the incident light cannot be vertically incident on the photosensitive surface of the photodetector 404 , so that the incident light deviates from the photosensitive surface and affects the light receiving effect of the BOSA. Similarly, when the angle ∠B between the WDM 402 and the outgoing light is greater than 45°, the incident light cannot enter the photosensitive surface of the photodetector 404 vertically, and the incident light will deviate from the photosensitive surface and affect the light of BOSA. Receive the effect.

通过会聚透镜403，将偏离光敏面的入射光会聚至光敏面，从而保证BOSA的光接收效果。并且，扩大了波分复用器的安装角度的容许偏差范围。Through the converging lens 403, the incident light deviated from the photosensitive surface is converged to the photosensitive surface, thereby ensuring the light receiving effect of the BOSA. Moreover, the allowable deviation range of the installation angle of the wavelength division multiplexer is expanded.

除了图5至图7所示的几方面的有益效果，会聚透镜403还可以扩大光电探测器的容许偏差范围与发光芯片的容许偏差范围之和。如图8所示，ΔPD为光电探测器的入射光的容许偏移距离。Δy为光电探测器的光敏面中心与入射光之间的容许偏差距离，即光敏面中心与第二光轴之间的容许偏差范围。本申请实施例的结构通过会聚透镜，使得Δy＝ΔPD×f(f为会聚透镜的放大率)。相较于现有技术增大了Δy，也就增大了光电探测器的光敏面中心与光纤中心(即第一光轴)之间的容许偏差距离。In addition to the beneficial effects shown in FIGS. 5 to 7 , the converging lens 403 can also expand the sum of the allowable deviation range of the photodetector and the allowable deviation range of the light-emitting chip. As shown in FIG. 8 , ΔPD is the allowable offset distance of the incident light of the photodetector. Δy is the allowable deviation distance between the center of the photosensitive surface of the photodetector and the incident light, that is, the allowable deviation range between the center of the photosensitive surface and the second optical axis. The structure of the embodiment of the present application uses a converging lens, so that Δy=ΔPD×f (f is the magnification of the converging lens). Compared with the prior art, increasing Δy also increases the allowable deviation distance between the center of the photosensitive surface of the photodetector and the center of the optical fiber (ie, the first optical axis).

由于波分复用器402相对于出射光是45°放置，因此发光芯片的Δz＝Δy。因此可以在发光芯片的z轴上，以及光电探测器的y轴上，合理分配容许偏差距离，从而减小在某一方向上位置控制的难度。只要保证ΔyPD+ΔzLD≤ΔyPD×f，即可保证收发光路在y轴(z轴)上的耦合效果。同理，在x轴上，只要保证ΔxPD+ΔxLD≤ΔPD×f，即可保证收发光路在x轴上的耦合效果。其中，ΔyPD为光电探测器在y轴上的容许偏差范围，ΔzLD为发光芯片在z轴上的容许偏差范围。ΔPD为光电探测器自身的容许偏差范围。ΔxPD和ΔxLD分别表示光电探测器和发光芯片在x轴上的容许偏差范围。Since the wavelength division multiplexer 402 is placed at 45° relative to the outgoing light, Δz=Δy of the light emitting chip. Therefore, the allowable deviation distance can be reasonably allocated on the z-axis of the light-emitting chip and the y-axis of the photodetector, thereby reducing the difficulty of position control in a certain direction. As long as ΔyPD+ΔzLD≤ΔyPD×f is ensured, the coupling effect of the receiving and receiving optical circuits on the y-axis (z-axis) can be guaranteed. Similarly, on the x-axis, as long as ΔxPD+ΔxLD≤ΔPD×f is ensured, the coupling effect of the receiving and receiving optical circuits on the x-axis can be guaranteed. Wherein, ΔyPD is the allowable deviation range of the photodetector on the y-axis, and ΔzLD is the allowable deviation range of the light-emitting chip on the z-axis. ΔPD is the allowable deviation range of the photodetector itself. ΔxPD and ΔxLD represent the allowable deviation ranges of the photodetector and the light-emitting chip on the x-axis, respectively.

例如：生产设备(例如机械手)在z轴上控制位置的难度比在y轴上的难度高。那么在z轴上，为发光芯片分配更大的公差(容许偏差距离)，在y轴上为光电探测器分配小一点的公差。从而减小对生产设备的精度需求。只要使两个方向上公差之和小于或等于Δy＝ΔPD×f，即可保证收发光路在光纤上的耦合效果。For example: production equipment (such as manipulators) is more difficult to control the position on the z-axis than on the y-axis. Then on the z-axis, a larger tolerance (tolerance distance) is assigned to the light-emitting chip, and a smaller tolerance is assigned to the photodetector on the y-axis. Thereby reducing the precision requirements for production equipment. As long as the sum of the tolerances in the two directions is less than or equal to Δy=ΔPD×f, the coupling effect of the receiving and receiving optical circuits on the optical fiber can be guaranteed.

需要说明的是，本申请实施例中所述的容差范围(ΔPD、ΔyPD、ΔxPD、ΔzLD、ΔxLD等)可以表示出射光与入射光光轴之间的容差范围，也可以表示基于出射光与入射光光轴，附加考虑出射光和入射光光斑所得的容差范围，本申请对此不做限定。It should be noted that the tolerance range (ΔPD, ΔyPD, ΔxPD, ΔzLD, ΔxLD, etc.) described in the embodiments of the present application may represent the tolerance range between the outgoing light and the optical axis of the incident light, or may represent The optical axis of the incident light and the tolerance range obtained by additional consideration of the exit light and the incident light spot are not limited in this application.

在实际生产过程中，由于容许偏差范围的增大，可以放宽对发光芯片和/或光电探测器的装配精度的要求。从而降低对装配设备的精度要求。或者使用本发明的结构，通过较低精度的装配设备即可实现收发光路的耦合，提升产品良率。In the actual production process, due to the increase of the allowable deviation range, the requirements on the assembly accuracy of the light-emitting chip and/or the photodetector can be relaxed. Thereby reducing the accuracy requirements for assembly equipment. Alternatively, by using the structure of the present invention, the coupling of the receiving and receiving optical circuits can be realized through relatively low-precision assembly equipment, and the product yield rate can be improved.

需要说明的是，上述对容许偏差范围的描述，是示意性的说明。在实际光路中可能由于WDM的装配角度偏差、发光芯片出光口的同心度偏差、光电探测器的光敏面积偏差、高度偏差等，导致容许偏差范围和实际偏差范围之间有细微区别。这些也属于本申请的范围。It should be noted that the above description of the allowable deviation range is a schematic description. In the actual optical path, there may be subtle differences between the allowable deviation range and the actual deviation range due to the deviation of the assembly angle of the WDM, the deviation of the concentricity of the light outlet of the light-emitting chip, the deviation of the photosensitive area of the photodetector, and the deviation of the height. These also belong to the scope of the present application.

需要说明的是，WDM的装配角度可能存在偏差，所导致的光路和偏差范围的细微改变，都属于本申请的范围，对此不做限定。It should be noted that there may be deviations in the assembly angle of the WDM, and the resulting slight changes in the optical path and deviation range all belong to the scope of this application, which is not limited.

需要说明的是，图5至图8实施例所述的多个方面的有益效果，可以独立存在于本申请实施例提供的光收发组件中，也可以组合存在，本申请对此不做限定。例如，光收发组件400中的会聚透镜403，即可扩大光电探测器与第一光轴之间的容许偏差范围(具体参见图5)，又可增大光电探测器本身的容许偏差范围ΔPD(具体参见图6)。It should be noted that the beneficial effects of the multiple aspects described in the embodiments of FIG. 5 to FIG. 8 can exist independently in the optical transceiver assembly provided in the embodiment of the present application, or can exist in combination, which is not limited in the present application. For example, the converging lens 403 in the optical transceiver assembly 400 can expand the allowable deviation range between the photodetector and the first optical axis (see FIG. 5 for details), and can also increase the allowable deviation range ΔPD( See Figure 6 for details).

基于上述的光收发组件400结构，本申请实施例还提供了一种扩展的光收发组件结构。在图4至图8所示的光收发组件400结构中，可以调换光电探测器404与发光芯片401的位置。调换后的结构如图9所示。在光收发组件400中，发光芯片401用于提供出射光。波分复用器402用于折射出射光，从而将出射光投射至第一光轴上。波分复用器402还用于将第一光轴上的入射光反射至第二光轴上。会聚透镜403用于将第二光轴上的入射光会聚至光电探测器，以扩大光电探测器与第三光轴之间的容许偏差范围。其中第三光轴为第一光轴在波分复用器402上反射后的光轴，也是从发光芯片发出的出射光的光轴。相较于图4，图9所示的结构区别仅在于入射光和出射光的方向。因此图9所示的结构具有图4所示的出射光与入射光之间的耦合影响关系等，因此对应的说明以及有益效果可以参见图4至图8的说明，此处不再赘述。Based on the above structure of the optical transceiver component 400, the embodiment of the present application also provides an extended structure of the optical transceiver component. In the structure of the optical transceiver assembly 400 shown in FIGS. 4 to 8 , the positions of the photodetector 404 and the light emitting chip 401 can be exchanged. The structure after the exchange is shown in Figure 9. In the optical transceiver assembly 400, the light emitting chip 401 is used to provide outgoing light. The wavelength division multiplexer 402 is used to refract the outgoing light, so as to project the outgoing light onto the first optical axis. The wavelength division multiplexer 402 is also used to reflect the incident light on the first optical axis to the second optical axis. The converging lens 403 is used for converging the incident light on the second optical axis to the photodetector, so as to expand the allowable deviation range between the photodetector and the third optical axis. The third optical axis is the optical axis after the first optical axis is reflected on the wavelength division multiplexer 402 , and is also the optical axis of the outgoing light emitted from the light-emitting chip. Compared with FIG. 4 , the structure shown in FIG. 9 differs only in the directions of incident light and outgoing light. Therefore, the structure shown in FIG. 9 has the coupling influence relationship between outgoing light and incident light shown in FIG. 4 , so the corresponding descriptions and beneficial effects can refer to the descriptions of FIGS. 4 to 8 , and will not be repeated here.

可选地，基于图4至图9所示的光收发组件结构，还可以在入射光的光路上设置滤波器，实现对入射光的滤波。如图10所示，在该结构中，在光收发组件400的波分复用器402与会聚透镜403之间的光路上，还包括滤波器405。滤波器用于过滤会聚前的入射光，使得入射会聚透镜403的入射光在目标波长范围内。从而使得入射光电探测器404的会聚后的入射光在目标波长范围内。Optionally, based on the structures of the optical transceiver components shown in FIGS. 4 to 9 , a filter may also be provided on the optical path of the incident light to filter the incident light. As shown in FIG. 10 , in this structure, a filter 405 is further included on the optical path between the wavelength division multiplexer 402 and the converging lens 403 of the optical transceiver assembly 400 . The filter is used to filter the incident light before being converged, so that the incident light entering the converging lens 403 is within the target wavelength range. Thus, the converged incident light incident on the photodetector 404 is within the target wavelength range.

需要说明的是，目标波长范围为光电探测器接收的光信号的波长范围。由于光信号经过光线路终端、光传输网络、光纤等的传输，可能产生噪声信号。因此通过滤波器滤除目标波长范围之外的信号，提升光电探测器所接收的入射光的信噪比。It should be noted that the target wavelength range is the wavelength range of the optical signal received by the photodetector. Due to the transmission of optical signals through optical line terminals, optical transmission networks, optical fibers, etc., noise signals may be generated. Therefore, the signal outside the target wavelength range is filtered out by the filter, and the signal-to-noise ratio of the incident light received by the photodetector is improved.

可选地，在光收发组件400中，滤波器405还可以放置在会聚透镜403与光电探测器404之间的光路上。在这种结构中，滤波器405则用于过滤会聚后的入射光，使得入射光电探测器404的会聚后的入射光在目标波长范围内，本申请对此不做限定。Optionally, in the optical transceiver assembly 400 , the filter 405 may also be placed on the optical path between the converging lens 403 and the photodetector 404 . In this structure, the filter 405 is used to filter the converged incident light, so that the converged incident light entering the photodetector 404 is within the target wavelength range, which is not limited in the present application.

在包括会聚透镜403和滤波器405的结构中，可以通过支撑结构支撑波分复用器402和滤波器405，以减小生产装配过程中的工艺难度。In the structure including the converging lens 403 and the filter 405, the wavelength division multiplexer 402 and the filter 405 can be supported by a supporting structure, so as to reduce the difficulty of process in the production and assembly process.

如图11所示，在光收发组件400的TO封装中，包括发光芯片401、波分复用器402、会聚透镜403、光电探测器404、滤波器405、支撑结构406和底座和管帽透镜。TO底座通过激光二极管底座(laser diode sub，LD SUB)支撑发光芯片401，通过光电二极管底座(photodiode sub，PD SUB)支撑光电探测器404。As shown in Figure 11, in the TO package of the optical transceiver assembly 400, it includes a light-emitting chip 401, a wavelength division multiplexer 402, a converging lens 403, a photodetector 404, a filter 405, a support structure 406, a base and a cap lens . The TO base supports the light-emitting chip 401 through a laser diode sub (LD SUB), and supports the photodetector 404 through a photodiode sub (PD SUB).

支撑结构406与会聚透镜403相连，用于支撑波分复用器402。具体的，如图12所示，支撑结构406包括两个斜面。该两个斜面用于支撑波分复用器402。The supporting structure 406 is connected with the converging lens 403 and is used for supporting the wavelength division multiplexer 402 . Specifically, as shown in FIG. 12 , the support structure 406 includes two slopes. The two slopes are used to support the wavelength division multiplexer 402 .

需要说明的是，图12仅是对支撑结构406的一个示例，并不造成对支撑结构406所包含斜面数量的限定。支撑结构406可以包括一个或多个斜面，本申请对此不做限定。It should be noted that FIG. 12 is only an example of the support structure 406 , and does not limit the number of slopes included in the support structure 406 . The support structure 406 may include one or more slopes, which is not limited in the present application.

如图11和12所示，会聚透镜403包括至少一个凸面，凸面用于实现对入射光的会聚。会聚透镜403还可以包括一个平面，该平面可以用于放置滤波器405。如图11和12所示，会聚透镜包括的平面可以与支撑结构406连接，该平面用于固定滤波器405。而与会聚透镜403的平面相对的凸面，则用于会聚入射光。As shown in FIGS. 11 and 12 , the converging lens 403 includes at least one convex surface for converging incident light. Converging lens 403 may also include a flat surface, which may be used to place filter 405 . As shown in FIGS. 11 and 12 , the converging lens includes a flat surface, which is used to hold the filter 405 , which can be connected to a support structure 406 . The convex surface opposite to the plane of the converging lens 403 is used to condense the incident light.

可选地，除了图11和图12所示的结构，会聚透镜403和支撑结构406的结构也可以如图13和14所示。在图13和14所示的会聚透镜403结构与支撑结构406中，会聚透镜403的凸面与支撑结构406连接，用于会聚入射光。而与会聚透镜403的凸面相对的平面，则用于固定滤波器405。Optionally, in addition to the structures shown in FIGS. 11 and 12 , the structures of the converging lens 403 and the support structure 406 may also be as shown in FIGS. 13 and 14 . In the structures of the converging lens 403 and the supporting structure 406 shown in FIGS. 13 and 14 , the convex surface of the converging lens 403 is connected to the supporting structure 406 for converging incident light. The plane opposite to the convex surface of the converging lens 403 is used to fix the filter 405 .

在图11和12的会聚透镜403和支撑结构406的结构中，来自光纤的入射光经波分复用器402的折射后，先经过滤波器405再经过会聚透镜403实现对入射光的会聚。将滤波器405放置在会聚透镜403之前的光路上，可以减小会聚透镜403之后的光程。在相同的放大率下会聚效果更好，对应的光收发组件400的收发光路的耦合效果也就更好。In the structures of the converging lens 403 and the supporting structure 406 in FIGS. 11 and 12 , after the incident light from the optical fiber is refracted by the wavelength division multiplexer 402 , it first passes through the filter 405 and then the converging lens 403 to achieve convergence of the incident light. Placing the filter 405 on the optical path before the converging lens 403 can reduce the optical path after the converging lens 403 . Under the same magnification, the convergence effect is better, and the coupling effect of the corresponding optical transceiver component 400 is also better.

另一方面，将滤波器405放置在会聚透镜403之前的光路上，在相同的汇聚效果下可以减小会聚透镜403的放大率。由于会聚透镜403的放大率与尺寸大小相关，因此可以减小会聚透镜403的体积，从而减小整个光收发组件400的体积。On the other hand, placing the filter 405 on the optical path before the converging lens 403 can reduce the magnification of the converging lens 403 under the same converging effect. Since the magnification of the converging lens 403 is related to the size, the volume of the converging lens 403 can be reduced, thereby reducing the volume of the entire optical transceiver assembly 400 .

需要说明的是，滤波器405可以通过镀膜的方式固定在会聚透镜403的平面上，此时滤波器405为滤波膜。滤波器405也可以通过光学胶固定在会聚透镜403的平面上，此时滤波器405为滤波片。本申请对滤波器405的形态以及固定方式不做限定。It should be noted that the filter 405 can be fixed on the plane of the converging lens 403 by coating, and the filter 405 is a filter film at this time. The filter 405 can also be fixed on the plane of the converging lens 403 by optical glue, and the filter 405 is a filter at this time. The present application does not limit the shape and fixing method of the filter 405 .

可选地，若光收发组件400中不包括滤波器405，则会聚透镜403也可以不包括平面。在这种结构中，会聚透镜403不用于固定滤波器405。Optionally, if the optical transceiver assembly 400 does not include the filter 405, the condenser lens 403 may also not include a plane. In this configuration, the converging lens 403 is not used for the fixed filter 405 .

在本申请实施例中，通过与会聚透镜相连的支撑结构支撑波分复用器，使波分复用器和会聚透镜(以及可能存在的滤波器)集成在一个相连的结构上，可以减小波分复用器和会聚透镜(以及可能存在的滤波器)总体所占的体积，从而减小整个光收发组件的体积。In the embodiment of the present application, the wavelength division multiplexer is supported by a support structure connected with the converging lens, so that the wavelength division multiplexer and the converging lens (and possible filters) are integrated on a connected structure, which can reduce the The overall volume occupied by the wavelength division multiplexer and the converging lens (and possibly existing filters) reduces the volume of the entire optical transceiver assembly.

需要说明的是，图1所示的光收发组件，可以包括本申请实施例提供的光收发组件400结构。包括光收发组件400结构的ONU和PON***，都属于本申请实施例的保护范围。It should be noted that the optical transceiver assembly shown in FIG. 1 may include the structure of the optical transceiver assembly 400 provided in the embodiment of the present application. The ONU and the PON system including the structure of the optical transceiver assembly 400 belong to the protection scope of the embodiment of the present application.

将上述任一实施例中的组件400连接单板并放置于机框内则构成了光网络单元ONU。An optical network unit (ONU) is formed by connecting the components 400 in any of the above embodiments to a single board and placing them in a chassis.

将上述光网络单元应用于无源光网络***时，无源光网络***的结构如图15所示，包括：光线路终端100，光分布网络200，以及光网络单元300。其中，光网络单元300内设有光收发组件400。光分布网络200与光线路终端100连接；光网络单元300与光分布网络200连接。When the above optical network unit is applied to a passive optical network system, the structure of the passive optical network system is shown in FIG. 15 , including: an optical line terminal 100 , an optical distribution network 200 , and an optical network unit 300 . Wherein, the optical network unit 300 is provided with an optical transceiver component 400 . The optical distribution network 200 is connected to the optical line terminal 100; the optical network unit 300 is connected to the optical distribution network 200.

本申请实施例提供的光收发组件400以及包含光收发组件400的无源光网络***，可实现对来自光纤的光信号的接收以及通过光纤发送光信号。并且该光收发组件400的壳体结构适用于现有的BOSA壳体结构，使制作和封装工艺便于实现，避免了复杂的外部管体制作，提升了制作效率和良品率，从而降低了光收发组件400、ONU和无源光网络***的构建成本。The optical transceiver assembly 400 provided in the embodiment of the present application and the passive optical network system including the optical transceiver assembly 400 can realize the reception of optical signals from optical fibers and the transmission of optical signals through optical fibers. Moreover, the shell structure of the optical transceiver assembly 400 is applicable to the existing BOSA shell structure, which facilitates the realization of the fabrication and packaging process, avoids the complicated fabrication of the external tube body, improves the fabrication efficiency and the yield rate, and thus reduces the cost of optical transceivers. Construction costs of the assembly 400, ONU and passive optical network system.

在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

在本申请所提供的几个实施例中，应该理解到，所揭露的***，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

Claims

一种光收发组件，其特征在于，包括：An optical transceiver assembly, characterized in that it comprises:

发光芯片，用于提供出射光；A light-emitting chip for providing outgoing light;

波分复用器，用于将所述出射光反射至第一光轴上，以及将所述第一光轴上的入射光投射至第二光轴，其中，所述第一光轴与所述第二光轴平行；a wavelength division multiplexer, configured to reflect the outgoing light onto the first optical axis, and project the incident light on the first optical axis onto the second optical axis, wherein the first optical axis is connected to the parallel to the second optical axis;

会聚透镜，用于将所述第二光轴上的入射光会聚至光电探测器；a converging lens, for converging the incident light on the second optical axis to the photodetector;

所述光电探测器，用于接收会聚后的入射光。The photodetector is used to receive the converged incident light.
根据权利要求1所述的光收发组件，其特征在于，所述会聚透镜通过将所述第二光轴上的入射光会聚至光电探测器，实现：The optical transceiver assembly according to claim 1, wherein the converging lens realizes:

扩大所述光电探测器与所述第一光轴之间的容许偏差范围；或者，expanding the range of allowable misalignment between the photodetector and the first optical axis; or,

扩大所述光电探测器的容许偏差范围；或者，expanding the tolerance range of the photodetector; or,

扩大所述波分复用器的安装角度的容许偏差范围；或者，expanding the allowable deviation range of the installation angle of the wavelength division multiplexer; or,

扩大所述光电探测器的容许偏差范围与所述发光芯片的容许偏差范围之和，中的至少一项。At least one of the sum of the allowable deviation range of the photodetector and the allowable deviation range of the light-emitting chip is enlarged.
根据权利要求1或2所述的光收发组件，其特征在于，还包括：The optical transceiver assembly according to claim 1 or 2, further comprising:

滤波器，用于过滤会聚前或会聚后的所述入射光，使得入射所述光电探测器的会聚后的入射光在目标波长范围内。A filter is used to filter the incident light before or after convergence, so that the incident light after convergence entering the photodetector is within the target wavelength range.
根据权利要求3所述的光收发组件，其特征在于，The optical transceiver assembly according to claim 3, characterized in that,

所述滤波器位于所述波分复用器与所述会聚透镜之间的光路上，用于过滤会聚前的入射光，使得入射所述会聚透镜的入射光在目标波长范围内。The filter is located on the optical path between the wavelength division multiplexer and the converging lens, and is used to filter the incident light before converging, so that the incident light incident on the converging lens is within a target wavelength range.
根据权利要求3所述的光收发组件，其特征在于，The optical transceiver assembly according to claim 3, characterized in that,

所述滤波器位于所述会聚透镜与所述光电探测器之间的光路上，用于过滤会聚后的入射光，使得入射所述光电探测器的会聚后的入射光在目标波长范围内。The filter is located on the optical path between the condensing lens and the photodetector, and is used to filter the condensed incident light so that the condensed incident light incident on the photodetector is within a target wavelength range.
根据权利要求3至5中任一项所述的光收发组件，其特征在于，所述滤波器为：The optical transceiver assembly according to any one of claims 3 to 5, wherein the filter is:

滤波片；或者，filter; or,

所述会聚透镜表面上的滤波膜。filter film on the surface of the converging lens.
根据权利要求1至6中任一项所述的光收发组件，其特征在于，还包括：The optical transceiver assembly according to any one of claims 1 to 6, further comprising:

与所述会聚透镜相连的支撑结构，用于承载所述波分复用器；a support structure connected to the converging lens, for carrying the wavelength division multiplexer;

底座，用于承载所述发光芯片、所述光电探测器和所述支撑结构。The base is used for carrying the light-emitting chip, the photodetector and the supporting structure.
根据权利要求7所述的光收发组件，其特征在于，所述支撑结构包括一个或多个斜面，用于支撑所述波分复用器。The optical transceiver assembly according to claim 7, wherein the supporting structure comprises one or more slopes for supporting the wavelength division multiplexer.
一种光网络单元，其特征在于，包括权利要求1至8中任一项所述的光收发组件。An optical network unit, characterized by comprising the optical transceiver assembly according to any one of claims 1-8.
一种无源光网络***，其特征在于，包括：光线路终端、光分布网络以及如权利要求9所述的光网络单元，其中，所述光线路终端与所述光分布网络连接，所述光分布网络与所述光网络单元连接。A passive optical network system, characterized by comprising: an optical line terminal, an optical distribution network, and the optical network unit according to claim 9, wherein the optical line terminal is connected to the optical distribution network, and the An optical distribution network is connected to the optical network unit.