CN213122372U - Optical module - Google Patents
Optical module Download PDFInfo
- Publication number
- CN213122372U CN213122372U CN202022007055.9U CN202022007055U CN213122372U CN 213122372 U CN213122372 U CN 213122372U CN 202022007055 U CN202022007055 U CN 202022007055U CN 213122372 U CN213122372 U CN 213122372U
- Authority
- CN
- China
- Prior art keywords
- groove
- optical module
- circuit board
- optical
- electromagnetic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
The application discloses an optical module, which comprises a lower shell, an upper shell and a circuit board, wherein the upper shell covers the lower shell to form a cavity, and the circuit board is arranged in the cavity; the upper shell is provided with a first supporting plate and a groove, the groove is adjacent to the first supporting plate, and the first supporting plate is arranged between the circuit board and the upper shell body; one end of the circuit board is provided with a golden finger, the groove is arranged above the golden finger, and the golden finger and the first supporting plate are respectively positioned at two sides of the groove. The optical module that this application provided sets up the recess on the casing, and the inside electromagnetic wave that produces of optical module takes place to reflect in the recess, and the electromagnetic wave that produces with the golden finger connection of golden finger also takes place to reflect in the recess, has subdued the output of electromagnetic wave, has prevented that the electromagnetic wave from being conducted away by the electric mouth of optical module, has avoided the electromagnetic wave to other communication equipment, optical module internal device to produce electromagnetic interference, thereby improved the electromagnetic shielding performance of optical module.
Description
Technical Field
The application relates to the technical field of optical communication, in particular to an optical module.
Background
In the novel business and application modes of cloud computing, mobile internet, video and the like, an optical communication technology is used, and in optical communication, an optical module is a tool for realizing the interconversion of photoelectric signals and is one of key devices in optical communication equipment. The optical module is mainly used for photoelectric and electro-optical conversion, an electric signal is converted into an optical signal by a transmitting end of the optical module and is transmitted out through an optical fiber, and a received optical signal is converted into an electric signal by a receiving end of the optical module.
The optical module generally comprises a housing, an optoelectronic device, a functional circuit, an optical interface and the like, wherein the optoelectronic device, the functional circuit and the like are arranged in the housing. In order to prevent electromagnetic waves from causing electromagnetic interference to other communication devices outside the optical module, the casing is usually configured as a sealed casing to shield the internal electromagnetic waves and prevent the electromagnetic waves from leaking to cause electromagnetic interference.
However, the electrical port of the optical module is basically not sealed due to the requirement of gold finger wiring, so that electromagnetic waves in the optical module are conducted out from the electrical port, and electromagnetic interference is caused to other communication devices.
SUMMERY OF THE UTILITY MODEL
The application provides an optical module to realize electromagnetic wave shielding at an electric port of the optical module and improve electromagnetic shielding performance of the optical module.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application discloses an optical module, including:
a lower housing;
the upper shell covers the lower shell to form a cavity; a first supporting plate and a groove are arranged on the first supporting plate, and the groove is adjacent to the first supporting plate;
the circuit board is arranged in the cavity, and the first supporting plate is arranged between the circuit board and the upper shell body; one end of the supporting plate is provided with a golden finger, the groove is formed above the golden finger, and the golden finger and the first supporting plate are respectively positioned on two sides of the groove.
The optical module comprises a lower shell, an upper shell and a circuit board, wherein the upper shell covers the lower shell to form a cavity, and the circuit board is arranged in the cavity; a first support plate and a groove can be arranged on the upper shell, the groove is arranged adjacent to the first support plate, and the first support plate is arranged between the circuit board and the upper shell body; one end of the circuit board is provided with a golden finger, the groove is arranged above the golden finger, and the golden finger and the first supporting plate are respectively positioned at two sides of the groove, so that electromagnetic waves generated by an optical device on the circuit board are leaked out from a gap between the first supporting plate and the circuit board, and are reflected in the groove, so that the propagation direction of the electromagnetic waves can be changed, the output of the electromagnetic waves is reduced, and the electromagnetic waves are prevented from being conducted to the outside of the optical module. In addition, electromagnetic waves generated by the golden finger connector connected with the golden finger on the circuit board can be reflected in the groove to reduce the electromagnetic waves and prevent the electromagnetic waves from entering the optical module. According to the optical module, the groove is formed in the shell of the optical module, electromagnetic waves generated inside the optical module are reflected in the groove, the electromagnetic waves generated by the golden finger connector can also be reflected in the groove, the output of the electromagnetic waves can be reduced, the electromagnetic waves are prevented from being conducted out by the electric port of the optical module, electromagnetic interference of the electromagnetic waves on other communication equipment and devices inside the optical module is avoided, and therefore the electromagnetic shielding performance of the optical module can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal;
fig. 2 is a schematic structural diagram of an optical network terminal;
fig. 3 is a schematic structural diagram of an optical module according to an embodiment of the present application;
fig. 4 is an exploded schematic view of an optical module according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an upper housing of an optical module according to an embodiment of the present disclosure;
fig. 6 is another schematic angle diagram of an upper housing of an optical module according to an embodiment of the present disclosure;
fig. 7 is a schematic partial cross-sectional view of an optical module according to an embodiment of the present disclosure;
fig. 8 is an enlarged schematic view of a portion a of fig. 7.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
One of the core links of optical fiber communication is the interconversion of optical and electrical signals. The optical fiber communication uses optical signals carrying information to transmit in information transmission equipment such as optical fibers/optical waveguides, and the information transmission with low cost and low loss can be realized by using the passive transmission characteristic of light in the optical fibers/optical waveguides; meanwhile, the information processing device such as a computer uses an electric signal, and in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer, it is necessary to perform interconversion between the electric signal and the optical signal.
The optical module realizes the function of interconversion of optical signals and electrical signals in the technical field of optical fiber communication, and the interconversion of the optical signals and the electrical signals is the core function of the optical module. The optical module is electrically connected with an external upper computer through a golden finger on an internal circuit board of the optical module, and the main electrical connection comprises power supply, I2C signals, data information, grounding and the like; the electrical connection mode realized by the gold finger has become the mainstream connection mode of the optical module industry, and on the basis of the mainstream connection mode, the definition of the pin on the gold finger forms various industry protocols/specifications.
Fig. 1 is a schematic diagram of connection relationship of an optical communication terminal. As shown in fig. 1, the connection of the optical communication terminal mainly includes interconnection among the optical network terminal 100, the optical module 200, the optical fiber 101, and the network cable 103.
One end of the optical fiber 101 is connected with a far-end server, one end of the network cable 103 is connected with local information processing equipment, and the connection between the local information processing equipment and the far-end server is completed by the connection between the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is made by the optical network terminal 100 having the optical module 200.
An optical port of the optical module 200 is externally accessed to the optical fiber 101, and establishes bidirectional optical signal connection with the optical fiber 101; an electrical port of the optical module 200 is externally connected to the optical network terminal 100, and establishes bidirectional electrical signal connection with the optical network terminal 100; the optical module realizes the mutual conversion of optical signals and electric signals, thereby realizing the establishment of information connection between the optical fiber and the optical network terminal. Specifically, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input to the optical network terminal 100, and the electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module and input to the optical fiber.
The optical network terminal is provided with an optical module interface 102, which is used for accessing an optical module 200 and establishing bidirectional electric signal connection with the optical module 200; the optical network terminal is provided with a network cable interface 104, which is used for accessing the network cable 103 and establishing bidirectional electric signal connection with the network cable 103; the optical module 200 is connected to the network cable 103 via the optical network terminal 100. Specifically, the optical network terminal transmits a signal from the optical module to the network cable and transmits the signal from the network cable to the optical module, and the optical network terminal serves as an upper computer of the optical module to monitor the operation of the optical module.
At this point, a bidirectional signal transmission channel is established between the remote server and the local information processing device through the optical fiber, the optical module, the optical network terminal and the network cable.
Common information processing apparatuses include routers, switches, electronic computers, and the like; the optical network terminal is an upper computer of the optical module, provides data signals for the optical module, and receives the data signals from the optical module, and the common upper computer of the optical module also comprises an optical line terminal and the like.
Fig. 2 is a schematic diagram of an optical network terminal structure. As shown in fig. 2, the optical network terminal 100 has a circuit board 105, and a cage 106 is disposed on a surface of the circuit board 105; an electric connector is arranged in the cage 106 and used for connecting an electric port of an optical module such as a golden finger; the cage 106 is provided with a heat sink 107, and the heat sink 107 has a first boss portion such as a fin that increases a heat radiation area.
The optical module 200 is inserted into the optical network terminal 100, specifically, an electrical port of the optical module is inserted into an electrical connector inside the cage 106, and an optical port of the optical module is connected to the optical fiber 101.
The cage 106 is positioned on the circuit board, and the electrical connector on the circuit board is wrapped in the cage, so that the electrical connector is arranged in the cage; the optical module is inserted into the cage, held by the cage, and the heat generated by the optical module is conducted to the cage 106 and then diffused by the heat sink 107 on the cage.
Fig. 3 is a schematic structural diagram of an optical module according to an embodiment of the present application, and fig. 4 is an exploded schematic diagram of the optical module according to the embodiment of the present application. As shown in fig. 3 and 4, an optical module 200 provided in the embodiment of the present application includes an upper housing 201, a lower housing 202, an unlocking member 203, and a circuit board 300, and the circuit board 300 is provided with structures such as an optical device and a functional circuit.
The upper shell 201 is covered on the lower shell 202 to form a wrapping cavity with two openings; the outer contour of the packaging cavity generally presents a square body. Specifically, the lower housing 202 includes a main board and two side boards located at two sides of the main board and arranged perpendicular to the main board; the upper shell comprises a cover plate, and the cover plate covers two side plates of the upper shell to form a wrapping cavity; the upper shell may further include two side walls disposed at two sides of the cover plate and perpendicular to the cover plate, and the two side walls are combined with the two side plates to cover the upper shell 201 on the lower shell 202.
The two openings can be two end openings (204, 205) located at the same end of the optical module, or two openings located at different ends of the optical module; one opening is an electric port 204, and a gold finger of the circuit board extends out of the electric port 204 and is inserted into an upper computer such as an optical network terminal; the other opening is an optical port 205 for external optical fiber access to connect optical devices inside the optical module; the circuit board 300 and the photoelectric device on the circuit board 300 are positioned in the packaging cavity.
The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board 300, the photoelectric devices on the circuit board 300 and the like can be conveniently installed in the shells, and the upper shell and the lower shell form the packaging protection shell at the outermost layer of the module; the upper shell and the lower shell are made of metal materials generally, electromagnetic shielding and heat dissipation are achieved, the shell of the optical module cannot be made into an integral component generally, and therefore when devices such as a circuit board are assembled, the positioning component, the heat dissipation component and the electromagnetic shielding component cannot be installed, and production automation is not facilitated.
The unlocking component 203 is located on the outer wall of the wrapping cavity/lower shell 202, and is used for realizing the fixed connection between the optical module and the upper computer or releasing the fixed connection between the optical module and the upper computer.
The unlocking component 203 is provided with a clamping component matched with the upper computer cage; the end of the unlocking member 203 is pulled to make the unlocking member 203 relatively move on the surface of the outer wall; the optical module is inserted into the cage of the upper computer, and the optical module is fixed in the cage of the upper computer by the clamping component of the unlocking component 203; by pulling the unlocking member 203, the engaging member of the unlocking member 203 moves along with the unlocking member, and further, the connection relationship between the engaging member and the upper computer is changed, so that the engagement relationship between the optical module and the upper computer is released, and the optical module can be drawn out from the cage of the upper computer.
The circuit board 300 is provided with circuit traces, electronic components (such as capacitors, resistors, triodes, and MOS transistors), and chips (such as an MCU, a laser driver chip, a limiting amplifier chip, a clock data recovery CDR, a power management chip, and a data processing chip DSP).
The circuit board 300 is used to provide signal circuits for signal electrical connection, which can provide signals. The circuit board 300 connects the electrical devices in the optical module together according to the circuit design through circuit wiring to realize the electrical functions of power supply, electrical signal transmission, grounding and the like.
The circuit board is generally a hard circuit board, and the hard circuit board can also realize a bearing effect due to the relatively hard material of the hard circuit board, for example, the hard circuit board can stably bear a chip; when the optical transceiver component is positioned on the circuit board, the rigid circuit board can also provide stable bearing; the hard circuit board can also be inserted into an electric connector in the upper computer cage, and specifically, a metal pin/golden finger is formed on the surface of the tail end of one side of the hard circuit board and is used for being connected with the electric connector; these are not easily implemented with flexible circuit boards.
A flexible circuit board is also used in a part of the optical module to supplement a rigid circuit board; the flexible circuit board is generally used in combination with a rigid circuit board, for example, the rigid circuit board may be connected to the optical transceiver module by using the flexible circuit board.
When the electronic components, chips, and other devices on the circuit board 300 work, electromagnetic waves are generated, and because the circuit board 300 is disposed in the cavity formed by the upper housing 201 and the lower housing 202, the electromagnetic waves are reflected in the cavity and are not conducted to the outside of the optical module. However, due to the requirement of the gold finger wiring at the electrical port of the optical module, the structural design can not be closed basically, and electromagnetic waves inside the optical module are easily conducted out from the gap at the electrical port, so that the electromagnetic waves generate electromagnetic interference on other communication devices, or the electromagnetic waves generated by the gold finger connector connected with the gold finger are also easily conducted into the optical module from the gap at the electrical port, so as to generate electromagnetic interference on a photoelectric device inside the optical module.
In view of the above problems, an embodiment of the present application provides an optical module, where a groove is formed in an upper housing, the groove is formed above a gold finger, and electromagnetic waves transmitted and guided out from a gap at an electrical port of the optical module are incident into the groove and reflected in the groove, so that electromagnetic wave output can be reduced, electromagnetic interference of the electromagnetic waves on other communication devices is avoided, and electromagnetic shielding performance of the optical module is improved.
Fig. 5 is a schematic structural view of an upper housing 201 of an optical module according to an embodiment of the present disclosure, and fig. 6 is a schematic structural view of another angle of the upper housing 201 of the optical module according to the embodiment of the present disclosure. As shown in fig. 5 and 6, a first support plate 2011 and a groove are provided on the upper housing 201, the first support plate 2011 is disposed adjacent to the groove, and the first support plate 2011 is disposed between the main body of the upper housing 201 and the circuit board 300, and is used for supporting and fixing the circuit board 300. In the embodiment of the present application, the first support plate 2011 and the groove are parallel to each other and both disposed along the width direction of the upper housing 201.
Specifically, the first support plate 2011 may divide the main body of the upper housing 201 into a first portion and a second portion, the second portion is located above the gold finger on the circuit board 300, and the groove is disposed on the second portion of the upper housing 201 for reflecting and reducing the electromagnetic wave conducted on the circuit board 300.
At least two grooves can be arranged on the upper shell 201, the first supporting plate 2011 and the at least two grooves are arranged in parallel, and the at least two grooves are arranged on the same side of the first supporting plate 2011. Electromagnetic waves generated by the photoelectric device on the circuit board 300 can be conducted out from a gap between the first support plate 2011 and the circuit board 300, the conducted electromagnetic waves enter the groove of the upper shell 201, the electromagnetic waves are reflected in the groove, the transmission direction of the electromagnetic waves is changed, and the energy of the electromagnetic waves is reduced; then the electromagnetic wave enters into another groove and continues to be reflected in the other groove, and the energy of the electromagnetic wave is further reduced. Therefore, the electromagnetic wave conducted to the outside of the optical module can be reduced, and the electromagnetic wave is prevented from generating electromagnetic interference on other communication equipment outside the optical module.
Similarly, the gold finger connector connected to the gold finger also generates electromagnetic waves, and the electromagnetic waves are also conducted from the gap between the first support plate 2011 and the circuit board 300 to the inside of the optical module. In the embodiment of the present application, the electromagnetic wave generated by the gold finger connector enters the groove of the upper housing 201, and the electromagnetic wave is reflected in the groove, so as to change the propagation direction of the electromagnetic wave and reduce the energy of the electromagnetic wave; then the electromagnetic wave enters into another groove and continues to be reflected in the other groove, and the energy of the electromagnetic wave is further reduced. By doing so, the electromagnetic wave conducted to the inside of the optical module can be reduced, and the electromagnetic wave is prevented from generating electromagnetic interference on the photoelectric device inside the optical module.
Fig. 7 is a partial cross-sectional view of an optical module according to an embodiment of the present application, and fig. 8 is an enlarged schematic view of a portion a in fig. 7. As shown in fig. 7 and 8, the upper housing 201 may be provided with a first groove 2012 and a second groove 2013, the first support plate 2011, the first groove 2012 and the second groove 2013 are disposed in parallel, and a side surface of the first groove 2012 may be the same as a side surface of the first support plate 2011, that is, the first groove 2012 and the first support plate 2011 share the same side surface.
In the embodiment of the present application, according to the size of the optical module and the gold finger on the circuit board 300, the groove widths of the first groove 2012 and the second groove 2013 on the upper housing 201 may be 0.6-1 mm, and the width of the baffle between the first groove 2012 and the second groove 2013 may be 0.6-1 mm. Therefore, after the electromagnetic wave is reflected in the first groove 2012, the reflected electromagnetic wave easily enters the second groove 2013 and continues to be reflected in the second groove 2013, and the energy of the electromagnetic wave is further reduced.
When the electromagnetic wave generated by the optoelectronic device on the circuit board 300 is conducted out through the gap between the first support plate 2011 and the circuit board 300, the radiation angle of the electromagnetic wave can be distributed in all directions; or when the electromagnetic wave generated by the golden finger connector enters the optical module, the radiation angle of the electromagnetic wave also has a plurality of directions. In order to make the electromagnetic wave enter the first groove 2012 as much as possible, the depth of the first groove 2012 should be a predetermined depth to accommodate more electromagnetic waves. Similarly, the depth of the second groove 2013 should be a preset depth, so that the reflected electromagnetic wave enters the second groove 2013 as much as possible. In the embodiment of the present application, the predetermined depths of the first groove 2012 and the second groove 2013 may be 0.6-2 mm.
In order to separate the first groove 2012 from the second groove 2013, the depth of the baffle between the first groove 2012 and the second groove 2013 may also be 0.6-2 mm, so as to prevent the baffle from shielding the electromagnetic waves input from the first groove 2012 to the second groove 2013.
In the embodiment of the present application, the depths of the first groove 2012 and the second groove 2013 are not limited to the preset depths, and the preset depths of the first groove 2012 and the second groove 2013 may also be reasonably selected according to actual situations, which all belong to the protection scope of the embodiment of the present application.
Since the first groove 2012 and the second groove 2013 are both disposed along the width direction of the upper housing 201, and the first groove 2012 and the second groove 2013 are used for reflecting the electromagnetic wave conducted by the circuit board 300, the size of the first groove 2012 and the second groove 2013 may be equal to or slightly larger than the width size of the circuit board 300 so as to receive the electromagnetic wave conducted by the circuit board 300 as much as possible. In the embodiment of the present application, the sizes of the first groove 2012 and the second groove 2013 may be 12.8mm × 0.9mm in consideration of the sizes of the upper housing 201 and the circuit board 300.
In the optical module provided by the embodiment of the application, the upper shell is provided with the first supporting plate and at least two grooves, the grooves and the first supporting plate are arranged in parallel, and the first supporting plate is arranged between the upper shell body and the circuit board so as to support the circuit board; one end of the circuit board is provided with a golden finger, the groove is arranged above the golden finger, and the golden finger and the first supporting plate are respectively positioned at two sides of the groove, so that electromagnetic waves generated by photoelectric devices on the circuit board are conducted out through a gap between the first supporting plate and the circuit board, the electromagnetic waves enter the groove and are reflected in the groove, the propagation direction of the electromagnetic waves is changed, the output of the electromagnetic waves is reduced, the electromagnetic waves are prevented from being conducted to the outside of the optical module, and electromagnetic interference is generated on other communication equipment. In addition, the electromagnetic wave generated by the golden finger connector can be reflected in the groove to reduce the electromagnetic wave, so that the electromagnetic wave is prevented from entering the optical module, and the electromagnetic interference on the photoelectric device in the optical module is avoided. The optical module is provided with the at least two grooves on the upper shell, and the grooves are used for reflecting electromagnetic waves from the inside of the optical module or the golden finger connector, changing the propagation direction of the electromagnetic waves, reducing the output of the electromagnetic waves, performing electromagnetic shielding at the electric port of the optical module, and improving the electromagnetic shielding performance of the optical module.
Aiming at the weak part of the EMI design of the optical module, the embodiment of the application also provides the optical module, wherein the lower shell of the optical module is provided with a groove which is arranged below the golden finger, and the electromagnetic wave conducted by the gap at the electric port of the optical module is injected into the groove and reflected in the groove, so that the output of the electromagnetic wave can be reduced, the electromagnetic interference of the electromagnetic wave on other communication equipment is avoided, and the electromagnetic shielding performance of the optical module is improved.
Specifically, a second supporting plate and a groove are disposed on the lower housing 202, the second supporting plate is disposed adjacent to the groove, and the second supporting plate is disposed between the main body of the lower housing 202 and the circuit board 300, and is used for supporting and fixing the circuit board 300. In this example, the second support plate and the groove are parallel to each other, and are both disposed along the width direction of the lower housing 202.
At least two grooves may be formed on the lower case 202, the second supporting plate is disposed in parallel with the at least two grooves, and the at least two grooves are disposed on the same side of the second supporting plate. Electromagnetic waves generated by the photoelectric device on the circuit board 300 can be conducted out from a gap between the second support plate and the circuit board 300, the conducted electromagnetic waves enter the groove of the lower shell 202, the electromagnetic waves are reflected in the groove, the transmission direction of the electromagnetic waves is changed, and the energy of the electromagnetic waves is reduced; then the electromagnetic wave enters into another groove and continues to be reflected in the other groove, and the energy of the electromagnetic wave is further reduced. Therefore, the electromagnetic wave conducted to the outside of the optical module can be reduced, and the electromagnetic wave is prevented from generating electromagnetic interference on other communication equipment outside the optical module.
Similarly, the gold finger connector connected to the gold finger may generate electromagnetic waves, and the electromagnetic waves may be transmitted to the inside of the optical module from the gap between the second supporting plate and the circuit board 300. In the embodiment of the application, the electromagnetic wave generated by the golden finger connector enters the groove of the lower shell 202, and the electromagnetic wave is reflected in the groove, so that the propagation direction of the electromagnetic wave is changed, and the energy of the electromagnetic wave is reduced; and then the transmitted electromagnetic wave enters another groove and continues to be reflected in the other groove, so that the energy of the electromagnetic wave is further reduced. Therefore, the electromagnetic waves conducted into the optical module can be reduced, and the electromagnetic waves are prevented from generating electromagnetic interference on the photoelectric device in the optical module.
Specifically, the lower housing 202 may have a third groove and a fourth groove, the second support plate, the third groove and the fourth groove may be disposed in parallel, and a side of the third groove may be the same as a side of the second support plate, that is, the third groove and the second support plate share the same side.
The third groove and the fourth groove are arranged at intervals, and a baffle is arranged between the third groove and the fourth groove. Specifically, one side surface of the baffle plate and the other side surface of the third groove are the same side surface, and the other side surface opposite to the baffle plate and one side surface of the fourth groove are the same side surface. Namely, one side surface of two opposite side surfaces of the baffle is shared with the third groove, and the other side surface of the two opposite side surfaces of the baffle is shared with the fourth groove.
In the embodiment of the present application, according to the size of the optical module and the gold finger on the circuit board 300, the width of the third groove and the fourth groove on the lower housing 202 may be 0.6-1 mm, and the width of the baffle between the third groove and the fourth groove may be 0.6-1 mm. Therefore, after the electromagnetic wave is reflected in the first groove 2012, the reflected electromagnetic wave easily enters the second groove 2013 and continues to be reflected in the second groove 2013, and the energy of the electromagnetic wave is further reduced.
When the electromagnetic wave generated by the electro-optical device on the circuit board 300 is conducted out through the gap between the second support plate and the circuit board 300, the radiation angle of the electromagnetic wave can be distributed in all directions; or when the electromagnetic wave generated by the golden finger connector enters the optical module, the radiation angle of the electromagnetic wave also has a plurality of directions. In order to make the electromagnetic wave enter the third groove as much as possible, the depth of the third groove should be a predetermined depth to accommodate more electromagnetic wave. Similarly, the depth of the fourth groove should also be a preset depth, so that the reflected electromagnetic wave enters the fourth groove as much as possible. In the embodiment of the present application, the predetermined depth of the third groove and the predetermined depth of the fourth groove may be 0.6-2 mm.
In order to separate the third groove from the fourth groove, the depth of the baffle between the third groove and the fourth groove can be 0.6-2 mm, so that the baffle is prevented from shielding electromagnetic waves input into the fourth groove from the third groove.
In this application embodiment, the depth of the third groove and the fourth groove is not limited to a preset depth, and the preset depth of the third groove and the fourth groove can also be reasonably selected according to actual conditions, which all belong to the protection scope of this application embodiment.
Because the third and fourth grooves are disposed along the width direction of the lower housing 202 and used for reflecting the electromagnetic waves conducted by the circuit board 300, the dimensions of the third and fourth grooves may be equal to or slightly larger than the width dimension of the circuit board 300 so as to receive the electromagnetic waves conducted by the circuit board 300 as much as possible. In the embodiment of the present application, the dimensions of the third groove and the fourth groove may be 12.8mm × 0.9mm in consideration of the dimensions of the lower housing 202 and the circuit board 300.
In the optical module provided by the embodiment of the application, the lower shell is provided with the second support plate and at least two grooves, the grooves and the second support plate are arranged in parallel, and the second support plate is arranged between the lower shell body and the circuit board so as to support the circuit board; one end of the circuit board is provided with a golden finger, the groove is arranged below the golden finger, and the golden finger and the second supporting plate are respectively positioned at two sides of the groove, so that electromagnetic waves generated by photoelectric devices on the circuit board are conducted out through a gap between the second supporting plate and the circuit board, then enter the groove and are reflected in the groove, the propagation direction of the electromagnetic waves is changed, the output of the electromagnetic waves is reduced, the electromagnetic waves are prevented from being conducted to the outside of the optical module, and electromagnetic interference is generated on other communication equipment. In addition, the electromagnetic wave generated by the golden finger connector can be reflected in the groove to reduce the electromagnetic wave, so that the electromagnetic wave is prevented from entering the optical module, and the electromagnetic interference on the photoelectric device in the optical module is avoided. The optical module is provided with the at least two grooves on the upper shell, and the grooves are used for reflecting electromagnetic waves from the inside of the optical module or the golden finger connector, changing the propagation direction of the electromagnetic waves, reducing the output of the electromagnetic waves, performing electromagnetic shielding at the electric port of the optical module, and improving the electromagnetic shielding performance of the optical module.
In the embodiment of the application, a groove may be disposed on the upper housing or the lower housing, and is used to reflect the electromagnetic wave from the inside of the optical module or the gold finger connector, change the propagation direction of the electromagnetic wave, reduce the output of the electromagnetic wave, and improve the electromagnetic shielding performance of the optical module. However, considering the size of the optical module, it is not suitable to provide grooves for reducing electromagnetic waves on the upper housing and the lower housing, respectively.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (9)
1. A light module, comprising:
a lower housing;
the upper shell covers the lower shell to form a cavity; a first supporting plate and a groove are arranged on the first supporting plate, and the groove is adjacent to the first supporting plate;
the circuit board is arranged in the cavity, and the first supporting plate is arranged between the circuit board and the upper shell body; one end of the supporting plate is provided with a golden finger, the groove is formed above the golden finger, and the golden finger and the first supporting plate are respectively positioned on two sides of the groove.
2. The optical module according to claim 1, wherein the upper housing has at least two grooves, the first support plate is disposed in parallel with the at least two grooves, and the at least two grooves are disposed on the same side of the first support plate.
3. The optical module according to claim 2, wherein a first groove and a second groove are arranged in parallel on the upper housing, and a side surface of the first groove is the same as a side surface of the first support plate; a baffle is arranged between the first groove and the second groove.
4. The optical module according to claim 3, wherein one side surface of the baffle plate is the same as the other side surface of the first groove, and the other side surface of the baffle plate opposite to the one side surface of the second groove is the same as the one side surface of the second groove.
5. The optical module according to claim 3, wherein the width of each of the first and second grooves is 0.6-1 mm.
6. The optical module according to claim 4, wherein the width of the baffle is 0.6-1 mm.
7. The optical module of claim 6, wherein the depth of the baffle is 0.6-2 mm.
8. The optical module according to claim 1, wherein the depth of the groove is 0.6-2 mm.
9. The optical module of claim 1, wherein the grooves have dimensions of 12.8mm x 0.9 mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022007055.9U CN213122372U (en) | 2020-09-14 | 2020-09-14 | Optical module |
| PCT/CN2021/100973 WO2022037226A1 (en) | 2020-08-18 | 2021-06-18 | Optical module |
| PCT/CN2021/116995 WO2022052920A1 (en) | 2020-09-08 | 2021-09-07 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022007055.9U CN213122372U (en) | 2020-09-14 | 2020-09-14 | Optical module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213122372U true CN213122372U (en) | 2021-05-04 |
Family
ID=75662795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022007055.9U Active CN213122372U (en) | 2020-08-18 | 2020-09-14 | Optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213122372U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113885144A (en) * | 2021-09-27 | 2022-01-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN114063230A (en) * | 2021-11-08 | 2022-02-18 | 长飞光纤光缆股份有限公司 | Optical module capable of reducing electromagnetic interference |
| WO2022037226A1 (en) * | 2020-08-18 | 2022-02-24 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| WO2022052920A1 (en) * | 2020-09-08 | 2022-03-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
-
2020
- 2020-09-14 CN CN202022007055.9U patent/CN213122372U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022037226A1 (en) * | 2020-08-18 | 2022-02-24 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| WO2022052920A1 (en) * | 2020-09-08 | 2022-03-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN113885144A (en) * | 2021-09-27 | 2022-01-04 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN114063230A (en) * | 2021-11-08 | 2022-02-18 | 长飞光纤光缆股份有限公司 | Optical module capable of reducing electromagnetic interference |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213122372U (en) | Optical module | |
| CN212647081U (en) | Optical module | |
| CN213659029U (en) | Optical module | |
| CN214954237U (en) | Optical module | |
| CN112230350B (en) | Optical module | |
| CN112965190A (en) | Optical module | |
| CN214375429U (en) | Optical module | |
| CN112230349B (en) | Optical module | |
| WO2022041801A1 (en) | Optical module | |
| CN213302601U (en) | Optical module | |
| CN212647091U (en) | Optical module | |
| CN111308621B (en) | Optical module | |
| CN113325526A (en) | Optical module | |
| CN113253400A (en) | Optical module | |
| CN215186763U (en) | Optical module | |
| CN113721330B (en) | High-speed laser assembly and optical module | |
| CN214177318U (en) | Optical module | |
| CN214704104U (en) | Optical module | |
| CN213302608U (en) | Optical module | |
| CN214278492U (en) | Optical module | |
| CN112838896A (en) | Optical module | |
| CN114624826B (en) | Optical module | |
| CN213302583U (en) | Optical transceiver module and optical network unit | |
| CN214278494U (en) | Optical module | |
| CN215378933U (en) | Optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |