CN213122373U

CN213122373U - Optical module

Info

Publication number: CN213122373U
Application number: CN202022011568.7U
Authority: CN
Inventors: 刘维伟; 邵乾; 黄绪杰
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-05-04
Anticipated expiration: 2030-09-14

Abstract

The application provides an optical module, which comprises a circuit board and an optical transceiving component connected with the circuit board. The optical transceiving component comprises a round and square tube body and a first filter, and a first limiting boss, a second limiting boss and a first supporting boss are arranged in the round and square tube body; the surfaces of the first limiting boss and the second limiting boss are respectively provided with a first inclined surface and a second inclined surface; the first filter is of a cuboid structure, wherein a narrow side which is adjacent to the bottom surface of the round and square tube body in the length direction is set as a bottom end; the bottom end of the first filter is arranged on the surface of the first supporting boss; one end surface of the first filter plate in the length direction is connected with the first inclined surface, and the other end surface of the first filter plate is connected with the second inclined surface. When the filter plate is assembled, the first filter plate can be placed on the first supporting boss, so that a bonding cavity is prevented from being generated between the first filter plate and the contact surface of the first inclined plane and the contact surface of the second inclined plane, the first filter plate is completely attached to the first inclined plane and the second inclined plane, and the coupling efficiency of the optical power is guaranteed.

Description

Optical module

Technical Field

The application relates to the technical field of optical communication, in particular to an optical module.

Background

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 current packaging form of the optical module mainly includes a TO (Transistor-out) package and a COB (Chip on Board) package.

In an optical module of a TO packaging structure, core devices are a laser LD and a photoelectric detector PD, the laser is used for converting an electric signal into an optical signal, and the optical signal is coupled into an optical fiber TO realize signal transmission. The coupling efficiency is defined as the total light intensity of several percent emitted by the laser can be coupled into the optical fiber, and the coupling efficiency of the optical module package is very critical and directly influences the optical signal transmission performance and the production yield.

The filter is used as a light source device which can transmit specific wavelength and reflect other wavelengths, and the assembly precision of the filter directly influences the coupling efficiency of the optical module. However, when the filter is not tightly mounted, the direction of the optical path is changed, thereby reducing the coupling efficiency of the optical module.

SUMMERY OF THE UTILITY MODEL

The application provides an optical module to solve the technical problem that the coupling efficiency of the optical module is reduced because the mounting of a filter plate is not tight at present.

The application provides an optical module, including:

a circuit board;

the optical transceiving component is connected with the circuit board;

light receiving and dispatching subassembly includes light receiving device, light emitting device, circle square tube body and first filter, wherein:

a first limiting boss, a second limiting boss and a first supporting boss are arranged in the round-square tube body, and the heights of the first limiting boss and the second limiting boss are larger than that of the first supporting boss;

the surfaces of the first limiting boss and the second limiting boss are respectively provided with a first inclined surface and a second inclined surface;

the first filter is of a cuboid structure, wherein a narrow side which is adjacent to the bottom surface of the round and square tube body in the length direction is set as a bottom end;

the bottom end of the first filter is arranged on the surface of the first supporting boss;

one end surface of the first filter plate in the length direction is connected with the first inclined surface, and the other end surface of the first filter plate is connected with the second inclined surface.

Has the advantages that: the application provides an optical module, which comprises a circuit board and an optical transceiving component connected with the circuit board. The optical transceiving component comprises a round and square tube body and a first filter, wherein a first limiting boss, a second limiting boss and a first supporting boss are arranged in the round and square tube body, and the heights of the first limiting boss and the second limiting boss are greater than that of the first supporting boss; the surfaces of the first limiting boss and the second limiting boss are respectively provided with a first inclined surface and a second inclined surface; the first filter is of a cuboid structure, wherein a narrow side which is adjacent to the bottom surface of the round and square tube body in the length direction is set as a bottom end; the bottom end of the first filter is arranged on the surface of the first supporting boss; one end surface of the first filter plate in the length direction is connected with the first inclined surface, and the other end surface of the first filter plate is connected with the second inclined surface. When assembling the filter, can shelve first filter on first support boss, and then make first filter avoid with first inclined plane and second inclined plane on owing to the contact of processing remaining root chamfer to avoid first filter and the contact surface on first inclined plane and second inclined plane to produce the bonding cavity, make first filter paste completely in with first inclined plane and second inclined plane department, thereby guaranteed the coupling efficiency of luminous power.

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 any creative effort.

Fig. 1 is a schematic diagram of a connection relationship of an optical communication terminal;

FIG. 2 is a schematic diagram of an optical network unit;

fig. 3 is a schematic structural diagram of an optical module provided in an embodiment of the present application;

fig. 4 is an exploded structural schematic diagram of an optical module provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a light receiving and emitting assembly provided in an embodiment of the present application;

fig. 6 is a schematic partial structure diagram of an optical module according to an embodiment of the present application;

fig. 7 is another partial schematic structural diagram of an optical module according to an embodiment of the present disclosure;

fig. 8 is a schematic partial cross-sectional structure diagram of an optical module according to an embodiment of the present disclosure;

FIG. 9 is a schematic optical path diagram of a module according to an embodiment of the present disclosure;

fig. 10 is a schematic mounting diagram of a filter in the prior art according to an embodiment of the present application.

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. An optical network terminal in the optical communication terminal of the foregoing embodiment is described below with reference to fig. 2; 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 projection 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 disclosure, and fig. 4 is an exploded structural diagram of the optical module. The following describes the optical module in the optical communication terminal according to the foregoing embodiment with reference to fig. 3 and 4; 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, a circuit board 300, and an optical transceiver module 400.

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 may be two ends (204, 205) in the same direction, or two openings in different directions; 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 with the optical transceiver module 400 inside the optical module; the photoelectric devices such as the circuit board 300 and the optical transceiver module 400 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 optical transceiver module 400 and other devices can be conveniently installed in the shells, and the upper shell and the lower shell form the outermost packaging protection shell 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 component can be pulled to enable the unlocking component to move relatively on the surface of the outer wall; the optical module is inserted into a cage of the upper computer, and the optical module is fixed in the cage of the upper computer by a clamping component of the unlocking component; by pulling the unlocking component, the clamping component of the unlocking component moves along with the unlocking component, so that the connection relation between the clamping component and the upper computer is changed, the clamping relation 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 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.

The optical transceiver module 400 includes two parts, namely an optical transmitter and an optical receiver, which are respectively used for transmitting and receiving optical signals. The emission secondary module generally comprises a light emitter, a lens and a light detector, wherein the lens and the light detector are respectively positioned on different sides of the light emitter, light beams are respectively emitted from the front side and the back side of the light emitter, and the lens is used for converging the light beams emitted from the front side of the light emitter so that the light beams emitted from the light emitter are converging light to be conveniently coupled to an external optical fiber; the optical detector is used for receiving the light beam emitted by the reverse side of the optical emitter so as to detect the optical power of the optical emitter. Specifically, light emitted by the light emitter enters the optical fiber after being converged by the lens, and the light detector detects the light emitting power of the light emitter so as to ensure the constancy of the light emitting power of the light emitter. The optical transceiver module 400 will be described in detail below.

Fig. 5 is a schematic structural diagram of an optical transceiver module according to an embodiment of the present disclosure. In order TO fully utilize the advantages and technical characteristics of TO encapsulation and realize high integration of an optical network, the optical module provided by the application is in a double-optical-path structural form; in order to realize the dual optical path structure, as shown in fig. 5, the light transceiving module 400 in the embodiment of the present application includes a first light emitting device 500, a second light emitting device 500a, a first light receiving device 600, a second light receiving device 600a, a circular-square tube 700, and an optical module.

The round and square tube 700 is used for carrying the first light emitting device 500, the second light emitting device 500a, the first light receiving device 600 and the second light receiving device 600a, and in the embodiment of the present application, the round and square tube 700 is made of a metal material, which is beneficial to realizing electromagnetic shielding and heat dissipation. The round and square pipe body 700 is provided with a first pipe orifice 701, a second pipe orifice 702, a third pipe orifice 703 and a fourth pipe orifice 704. Preferably, the first pipe orifice 701 is disposed on a side wall of the round and square pipe body 700 in the length direction, the second pipe orifice 702 is disposed on a first side wall of the round and square pipe body 700 in the width direction, the third pipe orifice 703 is disposed on the first side wall of the round and square pipe body 700 in the width direction, and the fourth pipe orifice 704 is disposed on the second side wall of the round and square pipe body 700 in the width direction.

The first light emitting device 500 is embedded in the first pipe port 701, and the first light emitting device 500 is in heat conduction contact with the round and square pipe body 700 through the first pipe port 701; the second light emitting device 500a is embedded in the second pipe orifice 702, and the second light emitting device 500a is in heat conduction contact with the round and square pipe body 700 through the second pipe orifice 702, and similarly, the first light receiving device 600 is embedded in the third pipe orifice 703, and the first light receiving device 600 is in heat conduction contact with the round and square pipe body 700 through the third pipe orifice 703; the second light receiving device 600a is inserted into the fourth pipe opening 704, and the second light receiving device 600a is in heat conduction contact with the round and square pipe body 700 through the fourth pipe opening 704. Alternatively, the first light emitting device 500, the second light emitting device 500a, the first light receiving device 600, and the second light receiving device 600a are directly press-fitted into the round and square tube body 700, and the round and square tube body 700 is in contact with the first light emitting device 500, the second light emitting device 500a, the first light receiving device 600, and the second light receiving device 600a, respectively, directly or through a heat transfer medium. The round and square tube 700 can be used for heat dissipation of the first light emitting device 500, the second light emitting device 500a, the first light receiving device 600 and the second light receiving device 600a, and the heat dissipation effect is ensured.

The round and square tube body 700 is further provided with a fifth pipe orifice 705, the optical fiber adapter 800 is embedded into the fifth pipe orifice 705, and the optical fiber adapter 800 is preferably connected with an optical fiber in the application, that is, the optical fiber adapter 800 is embedded on the round and square tube body 700 and used for connecting the optical fiber.

In order to realize that optical signals emitted by the first light emitting device 500 and the second light emitting device 500a are transmitted to the optical fiber adapter 800 through the round and square tube 700, and external optical signals received by the optical fiber adapter 800 are transmitted to the first light receiving device 600 and the second light receiving device 600a through the round and square tube 700, the optical assembly in the embodiment of the present application includes a first filter 901, a second filter 902, a third filter 903, and a fourth filter 904; fig. 9 shows a schematic diagram of light paths through which light signals propagate among the first filter 901, the second filter 902, the third filter 903, and the fourth filter 904, where the first light emitting device 500 and the second light emitting device 500a respectively emit light beams with a main optical axis perpendicular TO the TO tube seat, the light beams are converted into collimated light beams by the collimating lens and emitted out by the TO tube cap, and the two emitted collimated light beams are perpendicular TO each other.

FIG. 9 is a schematic optical path diagram of a module according to an embodiment of the present disclosure; as shown in fig. 9, when the two emitted collimated light beams (1577nm light beam and 1490nm light beam) pass through the first filter (1577nm light beam and 1490nm light beam are transmitted), the 1577nm light beam can directly pass through the first filter; the 1490nm light beam is reflected by the first filter, and is converted into a light beam parallel to the 1577nm light beam by the light beam vertical to the 1577nm light beam, namely the 1577nm collimated light beam and the 1490 collimated light beam are combined into a light beam after passing through the first filter; then the combined light beam passes through an isolator 905, a second filter (transmitting 1577nm and 1490nm) and a third filter (transmitting 1577nm and 1490nm), and then collimated light beams of 1577nm and 1490nm are converged and coupled into the optical fiber through a converging lens.

Meanwhile, the optical fiber emits lasers with 1310nm and 1270nm wavelengths, the two lasers convert divergent light beams into collimated light beams after passing through the converging lens, when the collimated light beams with 1310nm and 1270nm pass through the third filter (1310 nm is penetrated and 1270nm is reversed), the collimated light beams with 1310nm directly penetrate through the third filter, the collimated light beams with 1270nm are reflected to the fourth filter (1270 nm is reversed) by the third filter, the collimated light beams with 1270nm are reflected to the first light receiving device by the fourth filter, and finally the collimated light beams are converged to the photosensitive surface of the photodiode of the first light receiving device.

And the 1310nm collimated light beam which penetrates through the third filter passes through the second filter (1310 nm is reflected), the 1310nm collimated light beam is reflected to a second light receiving device with a photodiode inside by the second filter, a tube cap of the second light receiving device is provided with a converging lens, and finally the 1310nm collimated light beam is converged to a photosensitive surface of the photodiode of the second light receiving device.

The optical coupling efficiency of the assembly precision direct influence light path of filter, current filter pastes the dress mode and is: glue is coated on the inclined limiting boss inside the round and square tube body, and the filter is attached to the inclined limiting boss by the glue; it can be seen that the assembly precision of the filter is determined by the machining precision of the inclined limiting boss, but the machining of the inclined limiting boss has a tolerance, the tolerance is mainly caused by the assembly tolerance of mechanical equipment, the abrasion of a cutter and other machining, the tolerance can cause the inclined supporting boss to form an arc chamfer at the root, the arc chamfer can cause the filter to generate an angle when being bonded, the schematic diagram of the angle specifically refers to fig. 10, as shown in fig. 10, the upper end of the filter is tightly attached to the inclined limiting boss, and a certain angle exists between the lower end and the inclined limiting boss. The generation of the angle changes the direction of the optical path, and the coupling efficiency of the optical path is reduced.

Fig. 6 is a schematic partial structure diagram of an optical module according to an embodiment of the present application; fig. 7 is a schematic partial structural diagram of an optical module according to an embodiment of the present application; fig. 8 is a schematic partial cross-sectional structure diagram of an optical module according to an embodiment of the present disclosure; a mounting manner of the filter provided in the embodiment of the present application is described below with reference to fig. 6, 7, and 8. Based on the above, in the optical module provided in the embodiment of the present application, the circular-square tube is internally provided with the first limiting boss 701a, the second limiting boss 701b, and the first supporting boss 703a, and the heights of the first limiting boss 701a and the second limiting boss 701b are greater than the height of the first supporting boss 703 a; the surfaces of the first limiting boss 701a and the second limiting boss 701b are respectively provided with a first inclined surface 702a and a second inclined surface 702 b; the first filter 901 is a rectangular parallelepiped structure, wherein a narrow side adjacent to the bottom surface of the circular tube in the length direction is a bottom end; the bottom end of the first filter 901 is disposed on the surface of the first supporting boss 703 a; one end surface of first filter 901 in the length direction is connected to first inclined surface 702a, and the other end surface is connected to second inclined surface 702 b. When assembling the filter, can shelve first filter 901 on first support boss 703a, and then make first filter 901 avoid with first inclined plane 702a and second inclined plane 702b on owing to process the contact of remaining root chamfer to avoid first filter and first inclined plane 702a and second inclined plane 702 b's contact surface to produce the bonding cavity, make the filter laminate completely with corresponding inclined plane, thereby guaranteed the coupling efficiency of optical power.

A first limiting boss 701a and a second limiting boss 701b are arranged in the round and square pipe body 700, and a first inclined plane 702a and a second inclined plane 702b are respectively arranged on the surfaces of the first limiting boss 701a and the second limiting boss 701 b; one end of the first filter 901 is connected to the first inclined plane 702a, and the other end is connected to the second inclined plane 702 b; a first supporting boss 703a is arranged between the bottom end of the first filter 901 and the inner shell of the round and square tube body; the first support bosses 703a are used to attach the first filter 901 to the first inclined surface 702a and the second inclined surface 702 b.

The circular arc chamfer can lead to the filter to produce the angle when bonding, the production of angle can cause unnecessary glue to overflow the bottom of first filter 901 simultaneously, cause glue to pile up, block up and lead to the optical aperture, setting up of first support boss 703a can make first filter 901 paste completely in with first inclined plane 702a and second inclined plane 702b department, unnecessary glue can gather in the space between first filter 901 and the pipe inner shell of circle side this moment, avoid blockking up and lead to the optical aperture, further guarantee the coupling efficiency of luminous power.

A third limiting boss 701c and a fourth limiting boss 701d are further arranged in the round and square pipe body, a third inclined plane 702c and a fourth inclined plane 702d are respectively arranged on two sides of the third limiting boss 701c, and a fifth inclined plane 702e and a sixth inclined plane 702f are respectively arranged on two sides of the fourth limiting boss 701 d; a fifth limiting boss 701e is further arranged in the round and square pipe body, and a seventh inclined plane 702g is arranged on the surface of the fifth limiting boss 701 e. One end of the second filter 902 is connected to the third inclined plane 702c, and the other end is connected to the fifth inclined plane 702 e; one end of the third filter 903 is connected to the fourth inclined plane 702d, and the other end is connected to the sixth inclined plane 702 f; the fourth filter 904 is connected to the seventh slope 702 g. A second supporting boss 703b and a third supporting boss 703c are respectively arranged between the bottom ends of the second filter 902 and the third filter 903 and the inner shell of the round and square tube body. When assembling the filter, can shelve second filter 902, third filter 903 respectively at second support boss 703b, third support boss 703c, and then make second filter 902, third filter 903 avoid with corresponding inclined plane on owing to the contact of processing remaining root chamfer to avoid producing the bonding cavity between the contact surface on filter and corresponding inclined plane, make filter laminate and corresponding inclined plane laminate completely, thereby guaranteed the coupling efficiency of luminous power.

Specifically, first filter 901, second filter 902, third filter 903 and fourth filter 904 in this application are the angle installation, first filter 901 inclines along the direction by second light emitting device to second light receiving device, second filter 902 inclines along the direction by first light receiving device to first light emitting device, third filter 903 inclines along the direction by first light receiving device to first light emitting device, fourth filter 904 inclines along the direction by first light receiving device to first light emitting device, so that the light signal that first light emitting device 500, second light emitting device 500a transmitted transmits to optical fiber adapter 800 via square tube 700, the outside optical fiber signal that optical fiber adapter 800 received transmits to first light receiving device 600 and second light receiving device 600a via square tube 700. In this example, the inclination angles of first filter 901, second filter 902, third filter 903, and fourth filter 904 are preferably set to 45 °.

Further, be equipped with isolator 905 between first filter and the second filter in this application embodiment, isolator 905 allows to assemble the light beam one-way transmission based on the polarization principle who passes through light, allows to see through from first filter 901 to the direction of second filter 902 promptly, avoids some reverse light beams to see through, prevents that the reverberation from getting back to first light emitting device 500, in the second light emitting device 500a, and then guarantees light emission quality.

The application provides an optical module, which comprises a circuit board and an optical transceiving component connected with the circuit board. The optical transceiving component comprises a round and square tube body and a first filter, wherein a first limiting boss, a second limiting boss and a first supporting boss are arranged in the round and square tube body, and the heights of the first limiting boss and the second limiting boss are greater than that of the first supporting boss; the surfaces of the first limiting boss and the second limiting boss are respectively provided with a first inclined surface and a second inclined surface; the first filter is of a cuboid structure, wherein a narrow side which is adjacent to the bottom surface of the round and square tube body in the length direction is set as a bottom end; the bottom end of the first filter is arranged on the surface of the first supporting boss; one end surface of the first filter plate in the length direction is connected with the first inclined surface, and the other end surface of the first filter plate is connected with the second inclined surface. When assembling the filter, can shelve first filter on first support boss, and then make first filter avoid with first inclined plane and second inclined plane on owing to the contact of processing remaining root chamfer to avoid first filter and the contact surface on first inclined plane and second inclined plane to produce the bonding cavity, make first filter paste completely in with first inclined plane and second inclined plane department, thereby guaranteed the coupling efficiency of luminous power.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A light module, comprising:

a circuit board;

the optical transceiving component is connected with the circuit board;

the light receiving and dispatching subassembly includes light receiving device, light emitting device, circle square tube body and first filter, wherein:

a first limiting boss, a second limiting boss and a first supporting boss are arranged in the round square tube body, and the heights of the first limiting boss and the second limiting boss are larger than that of the first supporting boss;

one end face of the first filter plate in the length direction is connected with the first inclined plane, and the other end face of the first filter plate is connected with the second inclined plane.

2. The optical module of claim 1, wherein the first support boss is integrally formed with an inner surface of the inner housing of the circular-square tube body.

3. The optical module according to claim 1, wherein a third limiting boss and a fourth limiting boss are further arranged in the circular square tube, a third inclined surface and a fourth inclined surface are respectively arranged on two sides of the third limiting boss, and a fifth inclined surface and a sixth inclined surface are respectively arranged on two sides of the fourth limiting boss;

the round square pipe body is also internally provided with a fifth limiting boss, and the surface of the fifth limiting boss is provided with a seventh inclined plane.

4. The optical module of claim 3, wherein the optical transceiver sub-module further comprises a second filter, a third filter and a fourth filter, and the second filter, the third filter and the fourth filter are all rectangular structures;

one end face of the second filter plate in the length direction is connected with the third inclined face, and the other end face of the second filter plate is connected with the fifth inclined face;

one end surface of the third filter plate in the length direction is connected with the fourth inclined surface, and the other end surface of the third filter plate is connected with the sixth inclined surface;

the fourth filter plate is connected with the seventh inclined plane.

5. The optical module according to claim 4, wherein a second supporting boss and a third supporting boss are further provided in the round and square tube;

the second filter and the third filter are of cuboid structures, wherein a narrow edge which is adjacent to the bottom surface of the round and square tube body in the length direction is set as a bottom end;

the bottom end of the second filter is arranged on the surface of the second supporting boss;

the bottom of third filter set up in the third supports on the surface of boss.

6. The optical module of claim 5, wherein the second and third support bosses are integrally formed with an inner surface of the inner housing.

7. A light module as claimed in claim 4, characterized in that an isolator is provided between the first filter segment and the second filter segment.