CN111239930A

CN111239930A - Optical module

Info

Publication number: CN111239930A
Application number: CN202010172733.9A
Authority: CN
Inventors: 钟岩; 丁翔宇; 潘红超; 杨思更; 刘旭霞
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-06-05

Abstract

The application discloses an optical module, including the upper and lower casing that forms enclosed construction, be used for providing the circuit board of signal, be used for producing the light signal or receive the optical chip of light signal, be used for changing the lens subassembly of light signal propagation direction and be used for connecting the optic fibre lock pin subassembly of lens subassembly and outside optic fibre. The optical chip and the lens assembly are arranged on the circuit board, and the lens assembly is connected with the optical fiber ferrule assembly. The optical fiber ferrule assembly comprises a first optical fiber ferrule, an internal optical fiber and an optical fiber adapter, wherein one end of the first optical fiber ferrule is inserted into the plugging part. One end of the internal optical fiber is inserted into the first optical fiber inserting core, and the other end of the internal optical fiber is inserted into the optical fiber adapter. One end of the fiber optic adapter is connected to an external optical fiber. The optical fiber adapter can be mutually independent in fixed position through the plugging part of the optical signal and the optical fiber adapter passing through the optical signal, so that the design position of the lens component in the optical module is prevented from being limited when the position of the optical fiber adapter is fixed according to an industrial protocol, and the flexibility of the internal design of the optical module is improved.

Description

Optical module

Technical Field

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

Background

In an optical fiber communication system, an optical transceiver module, referred to as an optical module for short, is a standard module in the field of optical communication. The optical module is a connection module which plays a role in photoelectric conversion.

The existing optical module comprises a circuit board, a lens assembly, an optical chip and an optical fiber adapter, wherein the lens assembly is arranged on the circuit board, the light emitting chip and the light receiving chip are arranged between the lens assembly and the circuit board, a flange structure is arranged at the front end of the lens assembly, and the lens assembly is directly connected with an optical port of the optical fiber adapter through the flange structure.

The lens assembly is directly clamped at the optical port of the optical fiber adapter after being fixed on the circuit board, so that the size of the optical port protocol is not met. When the sizes of the lens component and the optical port protocol are not in accordance, the lens component cannot be plugged into the optical port easily, and the communication connection between the external optical fiber and the lens component is realized wirelessly.

Disclosure of Invention

The application provides an optical module, has realized lens subassembly and light mouth grafting, realizes the communication connection between outside optic fibre and the lens subassembly.

A light module, comprising:

a lower housing;

the circuit board is arranged on the lower shell;

the optical chip is arranged on the circuit board and used for generating optical signals or receiving the optical signals;

the lens assembly is arranged on the circuit board, covers the optical chip and is used for changing the propagation direction of the optical signal, and one end of the lens assembly is provided with a plugging part through which the optical signal passes;

one end of the optical fiber ferrule assembly is inserted into the plugging part, and the other end of the optical fiber ferrule assembly is connected with an external optical fiber and used for receiving optical signals passing through the plugging part;

the optical fiber ferrule assembly comprises a ferrule holder,

one end of the first optical fiber inserting core is inserted into the plugging part, and the other end of the first optical fiber inserting core is connected with the internal optical fiber;

and the optical fiber adapter is clamped on the lower shell, and one end of the optical fiber adapter is connected with the internal optical fiber.

Has the advantages that: the application provides an optical module, the circuit board of this optical module sets up on lower casing, and optical chip and lens subassembly all set up on the circuit board, and the lens subassembly is connected with optic fibre lock pin subassembly. The circuit board is used for providing signals, the optical chip is used for generating optical signals or receiving optical signals, the lens assembly is used for changing the propagation direction of the optical signals, and the optical fiber ferrule assembly is used for transmitting the optical signals. The optical fiber ferrule assembly comprises a first optical fiber ferrule, an internal optical fiber and an optical fiber adapter, wherein one end of the first optical fiber ferrule is inserted into the plugging part of the lens assembly. One end of the internal optical fiber is inserted into the first optical fiber inserting core, and the other end of the internal optical fiber is inserted into the optical fiber adapter. The optical fiber adapter is clamped on the lower shell, and one end of the optical fiber adapter is connected with an external optical fiber. The optical fiber adapter and the lens assembly are connected through the first optical fiber inserting core and the internal optical fiber, so that the inserting and pulling part passing through the optical signal and the optical fiber adapter passing through the optical signal can be mutually independent in fixed positions, the design position of the lens assembly in the optical module is prevented from being limited when the position of the optical fiber adapter is fixed according to an industrial protocol, and the flexibility of the internal design of the optical module is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these 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 disclosure;

FIG. 4 is a schematic diagram of an exploded structure of an optical module according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of the optical module shown in FIG. 4 with an angle formed by removing the upper and lower housings;

FIG. 6 is a schematic structural diagram of the optical module shown in FIG. 4 with the upper and lower housings removed at another angle;

FIG. 7 is a schematic structural diagram of a lens assembly provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a lens assembly and a photonic chip according to an embodiment of the present disclosure;

FIG. 9 is a cross-sectional view of an optical module with an upper housing and a lens assembly removed according to an embodiment of the present application;

FIG. 10 is a cross-sectional view of a lens assembly and a fiber ferrule assembly according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of a fiber ferrule assembly according to an embodiment of the present disclosure;

figure 12 is a cross-sectional view of a first fiber stub provided in embodiments of the present application.

Detailed Description

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 of 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 signals, 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 the 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 interconversion 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 through 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 projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into the optical network terminal, specifically, the electrical port of the optical module is inserted into the electrical connector inside the cage 106, and the 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 view of an optical module according to an embodiment of the present disclosure, and fig. 4 is a schematic view of an exploded structure of an optical module according to an embodiment of the present disclosure. 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 covering the upper housing 201, a circuit board 300 for providing signals, a lens assembly 400 for changing a propagation direction of an optical signal, and an optical fiber ferrule assembly 500 for connecting the lens assembly 400 and an external optical fiber;

the upper shell 201 is covered on the lower shell 202 to form a wrapping cavity with two openings; the outer contour of the wrapping cavity is generally a square body, and specifically, the lower shell comprises a main plate and two side plates which are positioned at two sides of the main plate and are perpendicular to the main plate; 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 can also comprise two side walls which are positioned at two sides of the cover plate and are perpendicular to the cover plate, and the two side walls are combined with the two side plates to realize that the upper shell covers the lower shell.

The two openings can be two ends (203, 204) in the same direction, or two openings in different directions; one opening is an electric port 203, and a gold finger of the circuit board extends out of the electric port 203 and is inserted into an upper computer such as an optical network terminal; the other opening is an optical port 204 for external optical fiber access to connect with the lens assembly 400 inside the optical module; the photoelectric devices such as the circuit board 300, the lens assembly 400 and the optical fiber ferrule assembly 500 are positioned in the wrapping cavity.

The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board 300, the lens assembly 400, the optical fiber ferrule assembly 500 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 optical module; the upper shell and the lower shell are made of metal materials generally, so that electromagnetic shielding and heat dissipation are facilitated; generally, the housing of the optical module is not made into an integrated component, so that when devices such as a circuit board and the like are assembled, the positioning component, the heat dissipation component and the electromagnetic shielding component cannot be installed, and the production automation is not facilitated.

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 has signal circuitry for providing electrical connections for signals, which may provide signals. The circuit board 300 connects the power consumption periods of the optical modules together according to circuit design through circuit wiring to realize power supply, electrical signal transmission, grounding and other electrical functions.

The circuit board 300 is generally a rigid circuit board, which can also perform a bearing function due to its relatively rigid material, for example, the rigid circuit board can stably bear a chip; when the optical transceiver 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; flexible circuit boards are commonly used in conjunction with rigid circuit boards.

The lens assembly 400 is disposed on the circuit board 300, and functions to change the propagation direction of the optical signal. When an optical signal transmitted by the optical fiber ferrule assembly 500 enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal enters the circuit board 300. When an optical signal transmitted by the circuit board 300 enters the lens assembly 400, the optical signal is reflected, and the propagation direction of the optical signal is changed, so that the optical signal is transmitted to the optical ferrule assembly 500.

The optical fiber ferrule assembly 500 is disposed on the lower housing 202, and has one end connected to the lens assembly 400 and the other end connected to an external optical fiber for transmitting optical signals. Specifically, the optical signal emitted by the lens assembly 400 is transmitted to the external optical fiber through the optical ferrule assembly 500, and the optical signal emitted by the external optical fiber is transmitted into the lens assembly 400 through the optical ferrule assembly 500.

Fig. 5 is a schematic structural diagram of the optical module in fig. 4 with upper and lower housings removed, fig. 6 is a schematic structural diagram of the optical module in fig. 4 with the upper and lower housings removed, fig. 7 is a schematic structural diagram of the lens assembly provided in the embodiment of the present application, fig. 8 is a schematic structural diagram of the lens assembly and the optical chip provided in the embodiment of the present application, and fig. 9 is a cross-sectional diagram of the optical module provided in the embodiment of the present application with the upper housing and the lens assembly removed, as shown in fig. 5, 6, 7, 8, and 9, the optical module in the embodiment of the present application includes, in addition to the lens assembly 400 with a plug portion at one end and the optical ferrule assembly 500 for transmitting an optical signal, an optical chip 600 for generating an optical signal or receiving.

The optical chip 600 is disposed on the circuit board 300. Specifically, a receiving cavity is disposed between the lens assembly 400 and the circuit board 300, and the optical chip 600 is disposed in the receiving cavity.

Since high-speed data transmission requires a short distance between the optical chip 600 and its driving/matching chip to shorten the connection between the chips and reduce the signal loss caused by the connection, the optical chip 600 and its driving/matching chip are generally fixed in the accommodating cavity at the same time. Specifically, the optical chip 600 may be the light emitting chip 610 or the light receiving chip 620. When the optical chip 600 is the light emitting chip 610, not only the light emitting chip 610 but also a driving chip cooperating with the light emitting chip 610 may be accommodated in the accommodation cavity, and the driving chip cooperating with the light emitting chip 610 and the light emitting chip 610 are disposed in close proximity. When the optical chip 600 is the light receiving chip 620, the accommodating cavity can accommodate not only the light receiving chip 620 but also a transimpedance amplifier chip cooperating with the light receiving chip 620, and the transimpedance amplifier chip cooperating with the light receiving chip 620 and the light receiving chip 620 are arranged in a close range. The above are the same as the optical chip 600. When two optical chips 600 are included in the receiving cavity, wherein one optical chip 600 is the light emitting chip 610 and the other optical chip 600 is the light receiving chip 620, not only the light emitting chip 610 and the driving chip cooperating with the light emitting chip 610 can be received in the receiving cavity, but also the driving chip cooperating with the light emitting chip 610 and the light emitting chip 610 are arranged in close proximity; it is also possible to accommodate the light receiving chip 620 and the transimpedance amplifier chip cooperating with the light receiving chip 620, and the transimpedance amplifier chip cooperating with the light receiving chip 620 and the light receiving chip 620 are arranged in close proximity. The specific situation can be set according to the actual concrete, and the application is not limited.

The optical chip 600 is used to generate an optical signal or receive an optical signal. Specifically, since the optical chip 600 may be the light emitting chip 610 or the light receiving chip 620, and the light emitting chip 610 is used for generating an optical signal and the light receiving chip 620 is used for receiving the optical signal, the optical chip 600 may generate the optical signal or receive the optical signal. When the optical chip 600 is the light emitting chip 610, the optical chip 600 may generate only an optical signal. When the optical chip 600 is the light receiving chip 620, the optical chip 600 may receive only the light signal. The specific situation can be set according to the actual concrete, and the application is not limited.

The lens assembly 400 is disposed on the circuit board 300 and covers the optical chip 600. Specifically, the lens assembly 400 is disposed on the circuit board 300 and disposed above the optical chip 600 in a covering manner, and the lens assembly 400 and the circuit board 300 form a cavity for enclosing the optical chip 600, such as the light emitting chip 610 and the light receiving chip 620. The light emitted by the light emitting chip 610 is reflected by the lens assembly 400 and enters the optical fiber ferrule assembly 500, the light from the optical fiber ferrule assembly 500 is reflected by the lens assembly 400 and enters the light receiving chip 620, and the lens assembly 400 not only plays a role in sealing the optical chip 600, but also establishes optical connection between the optical chip 600 and the optical fiber ferrule assembly 500.

The lens assembly 400 establishes optical connection between the optical chip 600 and the optical fiber ferrule assembly 500, and functions to change the propagation direction of an optical signal depending on the lens assembly 400. Specifically, when an optical signal transmitted by the optical fiber ferrule assembly 500 enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal enters the light receiving chip 620 of the optical chip 600. When an optical signal emitted from the light emitting chip 610 of the optical chip 600 enters the lens assembly 400, the optical signal is reflected to change the propagation direction of the optical signal, so that the optical signal is transmitted to the optical ferrule assembly 500.

Fig. 10 is a cross-sectional view of a lens assembly and a fiber ferrule assembly according to an embodiment of the present invention, and as shown in fig. 5, 6, 7, 8 and 10, a lens assembly 400 according to an embodiment of the present invention includes a first groove 410 and a second groove 420. In particular, the method comprises the following steps of,

when only the light emitting chip 610 and the driving chip mated with the light emitting chip 610 are accommodated in the accommodation cavity, the lens assembly 400 is provided with the first recess 410. When only the light receiving chip 620 and the transimpedance amplifier chip cooperating with the light receiving chip 620 are accommodated in the accommodation cavity, the lens assembly 400 is provided with the second recess 420. When the optical chip 600 includes both the light emitting chip 610 and the light receiving chip 620, the lens assembly 400 is provided with the first recess 410 and the second recess 420.

The first groove 410 is disposed on the top surface of the lens assembly 400, and forms a mirror surface 410a with the inclined sidewall of the first groove 410. The optical signal generated by the optical transmitting chip 610 is reflected into the fiber ferrule assembly 500 via the reflecting mirror 410 a. Specifically, under the driving action of the driving chip of the optical transmitting chip 610, the optical transmitting chip 610 emits an optical signal, and the optical signal is reflected by the reflecting mirror 410a to change the propagation direction of the optical signal, so that the propagation direction of the optical signal can be changed from vertical propagation to horizontal propagation, the optical signal with the changed propagation direction is emitted to the optical fiber ferrule assembly 500, and the optical fiber ferrule assembly 500 receives the optical signal with the changed propagation direction.

The second groove 420 is disposed on the top surface of the lens assembly 400, and is provided with a filter 421. The optical signal transmitted by the fiber ferrule assembly 500 is reflected by the optical filter 421 and directed to the light receiving chip 620 of the optical chip 600. Specifically, an optical signal incident from the optical ferrule assembly 500 is reflected by the optical filter 421, and the propagation direction of the optical signal is changed, so that the propagation direction of the optical signal is changed from horizontal propagation to vertical propagation, the optical signal with the changed propagation direction is emitted to the optical receiving chip 620, and under the synergistic effect of the transimpedance amplifier chip, the optical receiving chip 620 receives the optical signal with the changed propagation direction.

Since the optical filter 421 is disposed on the second groove 420, when the accommodating cavity accommodates not only the light emitting chip 610 and the driving chip cooperating with the light emitting chip 610, but also the light receiving chip 620 and the transimpedance amplifier chip cooperating with the light receiving chip 620, the optical signal generated by the light emitting chip 610 is reflected by the reflecting mirror 410a, and then passes through the optical filter 421 to enter the optical fiber ferrule assembly 500.

In the above structure, the first groove 410 is formed on the top surface of the lens assembly 400, so that the inclined sidewall thereof forms the reflective surface 410a for the optical signal, thereby conveniently realizing the arrangement of the reflective surface 410 a. In addition, the design of the optical filter 421 in the second groove 420 skillfully utilizes the light transmitting function of the optical filter 421 to allow the optical signal reflected by the reflecting surface 410a to pass through the optical filter 421, and skillfully utilizes the reflecting function of the optical filter 421 to reflect the optical signal incident through the fiber ferrule assembly 500 and receive the optical signal by the light receiving chip 620. The light path has the advantages of ingenious structural design, compact structure, small occupied space and low cost.

One end of the lens assembly 400 is provided with a plugging portion 430. One end of the plugging portion 430 is engaged with the inserted fiber ferrule assembly 500. Specifically, one end of the optical fiber ferrule assembly 500 is inserted into the insertion and extraction portion of the lens assembly 400 to connect the optical fiber ferrule assembly 500 and the lens assembly 400. When an optical signal transmitted by the optical ferrule assembly 500 needs to be incident on the lens assembly 400, the optical signal enters the lens assembly 400 through the inserting and extracting portion 430. When an optical signal emitted from the light emitting chip 620 needs to be transmitted to the fiber stub 500, the optical signal enters the fiber insertion assembly 500 through the plugging portion 430.

The insertion and extraction portion 430 includes an inner surface 431 for insertion of the fiber stub assembly 500 and an outer surface 432, the outer surface 432 coinciding with a centerline of the inner surface. To facilitate insertion of the fiber ferrule assembly 500 into the lens assembly 400, one end of the fiber ferrule assembly 500 is shaped to match the shape of the inner surface 431. Since the cross-sectional shape of one end of the fiber stub assembly 500 for inserting the insertion and extraction portion 430 is circular, the shape of the inner surface 431 may be circular, oval, rectangular, or diamond. But the inner diameter dimension of the inner surface 431 is greater than the inner diameter dimension of one end of the fiber ferrule assembly 500 for insertion of the insertion and extraction portion 430.

Fig. 11 is a schematic structural diagram of a fiber stub assembly according to an embodiment of the present disclosure, and as shown in fig. 5, 6 and 11, the fiber stub assembly 500 according to an embodiment of the present disclosure includes a first fiber stub 510 connected to a plug portion 430, an inner fiber 520 inserted into the first fiber stub 510, and a fiber adapter 530 connected to the inner fiber 520. In particular, the method comprises the following steps of,

one end of the first optical fiber ferrule 510 is engaged with the insertion/extraction portion 430 of the lens assembly 400. Specifically, the first optical fiber ferrule 510 is inserted into the inserting and pulling portion 430 of the lens assembly 400, and the lens assembly 400 is connected to the optical fiber ferrule assembly 500, so as to realize the communication connection between the lens assembly 400 and the optical fiber ferrule assembly 500.

The first optical fiber ferrule has a receiving cavity therein, and the inner optical fiber is inserted into the receiving cavity. The inner fiber 520, which may be made of glass or plastic, is inserted into the first fiber stub 510 at one end and into the fiber adapter 530 at the other end for transmitting optical signals. Specifically, the optical signal emitted from the lens assembly 400 is received through the first fiber stub 510 and transmitted along the internal optical fiber 520 except for being inserted into the first fiber stub 510 and the fiber adapter 530, and transmitted into the fiber adapter 530. Alternatively, the optical signal emitted from the fiber optic adapter 530 is transmitted along the internal optical fiber 520 except for the first fiber stub 510 and the fiber optic adapter 530, and transmitted to the first fiber stub 510, and the first fiber stub 510 emits the optical signal into the lens assembly 400.

In order to fix the inner fiber 520 to the lower housing 202, in the embodiment of the present application, the first fixing member 212 for fixing the inner fiber 520 is disposed on the lower housing 202. The first fixing member 212 includes a first groove for fixing the inner optical fiber 520.

The optical fiber adapter 530 has one end connected to the internal optical fiber 520 and the other end connected to the external optical fiber. Specifically, the optical fiber adapter 530 includes a second optical fiber ferrule and a sleeve wrapped around the second optical fiber ferrule, the second optical fiber ferrule has an accommodating cavity therein, the internal optical fiber 520 is inserted into the accommodating cavity of the second optical fiber ferrule, the second optical fiber ferrule is inserted into the sleeve, and a tail end formed by the external optical fiber is also inserted into the sleeve, so as to realize the butt joint between the external optical fiber and the second optical fiber ferrule.

The sleeve is externally provided with a clamping part which is clamped on the lower shell. Specifically, the lower shell is provided with a clamping portion corresponding to the clamping portion, and the clamping portion is clamped with the clamping portion on the lower shell. The engaging portion may be formed in a ring shape or other shapes. The clamping portion may be a groove. When the clamping part is a ring, the cross-sectional view of the groove on the lower shell corresponding to the clamping part can be circular arc or rectangular, and the specific shape can be designed according to the specific design.

In order to fix the fiber optic adapter 530 to the lower housing 202, in addition to the above-mentioned groove, in the embodiment of the present application, the second fixing assembly 222 for fixing the fiber optic adapter 530 is disposed on the lower housing 202. The second securing assembly 222 includes a second groove for securing the fiber optic adapter 530.

Fig. 12 is a schematic structural diagram of a first fiber stub according to an embodiment of the present disclosure, and as shown in fig. 12, the first fiber stub 510 according to an embodiment of the present disclosure is used for wrapping an internal fiber 520 and can be inserted into a plug portion 430; the first fiber stub 510 may be made of a ceramic material. Specifically, the first fiber stub 510 is a ceramic sleeve made of ceramic material, through which the inner fiber 520 passes, and the inner diameter of the ceramic sleeve is slightly larger than the outer diameter of the inner fiber 520.

The outer side of the first fiber stub 510 is wrapped with a sleeve base 511. The sleeve base 511 may be made of a material other than ceramic, such as stainless steel or other alloy materials, but the present application is not limited thereto. The sleeve base 511 has a larger trepan through which the first fiber stub 510 passes, and the inner diameter of the trepan is larger than the outer diameter of the first fiber stub 510 so as to perform a dispensing operation, and the dispensing operation is performed in a gap between the two, thereby achieving adhesion therebetween.

The outer circumference of the socket base 511 may be formed in a shape of a hexagon nut, but of course, other shapes may be formed, and the present application is not limited thereto.

The surface of the sleeve base 511 is coated with glue to be adhered to the circuit board 300. Specifically, since the surface of the sleeve base 511 is coated with glue, when the first optical fiber ferrule 510 is aligned with the lens assembly 400, the sleeve base 511 is conveniently adhered to the circuit board 300 by the glue.

In the present application, the lens assembly 400 and the optical fiber adapter 530 are connected by the first optical fiber ferrule 510 and the internal optical fiber 520, which not only can solve the problem that the lens assembly 400 and the external optical fiber cannot be communicatively connected when the size of the lens assembly 400 is not in accordance with the size of the optical port protocol; the problem that the shaking of the lens assembly 400 cannot realize communication connection due to the fact that an external optical fiber is inserted into the optical fiber adapter 530 can also be solved; the position of lens assembly 400 may also be specifically set as appropriate.

The number of the insertion and extraction portions 430 is two, and the number of the fiber ferrule assemblies 500 is two. It should be noted that both the two optical fiber ferrule assemblies 500 can be single-core bidirectional ferrules, that is, each ferrule can realize outward transmission of optical signals, and can also transmit optical signals inward. In addition, the two optical fiber ferrule assemblies 500 can also be unidirectional ferrules, one transmitting optical signals outwards and the other transmitting optical signals outwards.

The application provides an optical module, which comprises an upper shell, a lower shell covered with the upper shell, a circuit board used for providing signals, an optical chip used for generating optical signals or receiving the optical signals, a lens assembly used for changing the propagation direction of the optical signals and an optical fiber ferrule assembly used for connecting the lens assembly and an external optical fiber. The circuit board sets up on lower casing, and optical chip and lens subassembly all set up on the circuit board, and the lens subassembly is connected with optic fibre lock pin subassembly. The circuit board is used for providing signals, the optical chip is used for generating optical signals or receiving optical signals, the lens assembly is used for changing the propagation direction of the optical signals, and the optical fiber ferrule assembly is used for transmitting the optical signals. The optical fiber ferrule assembly comprises a first optical fiber ferrule, an internal optical fiber and an optical fiber adapter, wherein one end of the first optical fiber ferrule is inserted into the plugging part of the lens assembly. One end of the internal optical fiber is inserted into the first optical fiber inserting core, and the other end of the internal optical fiber is inserted into the optical fiber adapter. The optical fiber adapter is clamped on the lower shell, and one end of the optical fiber adapter is connected with an external optical fiber. When the size between two flanges of the lens assembly is not in accordance with the size of the optical port protocol, the first optical fiber ferrule of the optical fiber ferrule assembly and the internal optical fiber can be conveniently connected with the optical fiber adapter and the lens assembly which is not in accordance with the optical port protocol of the optical fiber adapter, so that the communication connection between the lens assembly and the external optical fiber is conveniently realized.

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

Claims

1. A light module, comprising:

a lower housing;

the circuit board is arranged on the lower shell;

the optical fiber ferrule assembly comprises a ferrule holder having a ferrule opening,

2. The optical module of claim 1, wherein the first fiber stub has a receiving cavity therein, the inner fiber being inserted into the receiving cavity.

3. The optical module of claim 2, wherein the outer side of the first optical fiber ferrule is wrapped with a sleeve base;

the sleeve base is coated with glue on the surface so as to be adhered to the circuit board.

4. The optical module of claim 1, wherein the plug portion comprises an inner surface and an outer surface;

the inner surface is used for inserting the first optical fiber inserting core;

the outer surface is coincident with a centerline of the inner surface.

5. The optical module of claim 1, wherein the fiber optic adapter includes a second fiber stub and a sleeve encasing the second fiber stub;

the second optical fiber ferrule internally has a receiving cavity, the inner optical fiber is inserted into the receiving cavity of the second optical fiber ferrule,

the sleeve is externally provided with a clamping part to be clamped on the lower shell.

6. The optical module according to claim 5, wherein the lower housing is provided with a clamping portion corresponding to the engaging portion, and the engaging portion is clamped in the clamping portion of the lower housing.

7. The optical module of claim 1, wherein the optical chip is a light emitting chip or a light receiving chip.

8. The light module of claim 4, wherein the lens assembly comprises:

the first groove is arranged on the top surface of the lens component and forms a reflecting mirror surface with the inclined side wall of the first groove;

and the second groove is arranged on the top surface of the lens component and is provided with an optical filter.

9. The optical module according to claim 3, wherein the number of the plug portions is two, and the number of the first fiber stubs is two.