CN113253400A - Optical module - Google Patents
Optical module Download PDFInfo
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- CN113253400A CN113253400A CN202110521317.XA CN202110521317A CN113253400A CN 113253400 A CN113253400 A CN 113253400A CN 202110521317 A CN202110521317 A CN 202110521317A CN 113253400 A CN113253400 A CN 113253400A
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- adapter
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- card slot
- hole
- optical module
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- 230000003287 optical effect Effects 0.000 title claims abstract description 172
- 239000013307 optical fiber Substances 0.000 claims abstract description 62
- 239000003292 glue Substances 0.000 claims abstract description 60
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 31
- 238000009434 installation Methods 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 13
- 238000004891 communication Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 6
- 230000010365 information processing Effects 0.000 description 6
- 230000002457 bidirectional effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000011449 Rosa Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 206010066054 Dysmorphism Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4256—Details of housings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The optical module comprises an upper shell, a lower shell, an optical engine, an adapter clamping groove and an optical fiber adapter, wherein the upper shell covers the lower shell to form an accommodating cavity, and the optical engine is arranged in the accommodating cavity and used for realizing the emission or the reception of light; one end of the lower shell is provided with a glue dispensing hole, two opposite side surfaces of the adapter clamping groove are in contact with the side surface where the glue dispensing hole is located, and glue injected through the glue dispensing hole is fixedly connected with the side surface of the lower shell; the side surface of the adapter clamping groove facing the upper shell is connected with the upper shell in a pressing mode; the optical fiber adapter is inserted in the adapter card slot and connected with the optical engine. This application separates adapter draw-in groove and lower casing, with the side fixed connection of adapter draw-in groove through the glue that the hole was glued to the glue pours into, so when there is installation tolerance in the photo engine, absorbed the installation tolerance of photo engine when installing the adapter to lower casing, the process is simple, has solved the more complicated problem of photo engine installation tolerance.
Description
Technical Field
The application relates to the technical field of optical fiber communication, in particular to an optical module.
Background
With the development of new services and application modes such as cloud computing, mobile internet, video and the like, the development and progress of the optical communication technology become increasingly important. In the optical communication technology, an optical module is a tool for realizing the interconversion of optical signals and is one of key devices in optical communication equipment, and the transmission rate of the optical module is continuously increased along with the development requirement of the optical communication technology.
An optical module generally includes a circuit board and an optical engine (light emitting module, light receiving module) electrically connected to the circuit board, and the optical engine is mounted with a mounting tolerance. In the high-speed optical module provided by the prior art, a flexible board or a pigtail adapter is generally adopted to absorb the installation tolerance of an optical engine, and meanwhile, a long groove is formed in a circuit board to absorb the installation tolerance. The tail fiber adapter is adopted to absorb the installation tolerance, a fiber coiling frame is generally adopted, the material cost is increased, and the fiber coiling required for assembly also increases the manufacturing difficulty; the mounting tolerance of the light engine is absorbed by adopting a flexible plate mode, so that the light engine is subjected to the bending force of the flexible plate, and the light engine falls off and the like if the light engine is bent too much; the circuit board slotting mode is adopted, the circuit board needs to be fixed on the module shell by glue, the process is complex, and long-term reliability risks exist.
Disclosure of Invention
The embodiment of the application provides an optical module, which aims to solve the problem that the installation tolerance of a light-absorbing engine is complex when the light engine is arranged in the existing optical module.
The application provides an optical module, includes:
one end of the lower shell is provided with a glue dispensing hole;
the upper shell covers the lower shell and forms an accommodating cavity with the lower shell;
the light engine is arranged in the accommodating cavity and used for realizing the emission or the reception of light;
the two opposite side surfaces of the adapter clamping groove are in contact with the side surface where the glue dispensing hole is located, and glue injected through the glue dispensing hole is fixedly connected with the side surface of the lower shell; the side surface of the upper shell facing the upper shell is connected with the upper shell in a pressing way;
and the optical fiber adapter is inserted in the adapter card slot and connected with the optical engine.
The optical module comprises an upper shell, a lower shell, an optical engine, an adapter clamping groove and an optical fiber adapter, wherein the upper shell covers the lower shell to form an accommodating cavity, and the optical engine is arranged in the accommodating cavity and used for realizing the emission or the reception of light; one end of the lower shell is provided with a glue dispensing hole, two opposite side surfaces of the adapter clamping groove are in contact with the side surface where the glue dispensing hole is located, and glue injected through the glue dispensing hole is fixedly connected with the side surface of the lower shell; the side surface of the upper shell facing the upper shell is connected with the upper shell in a pressing way; the optical fiber adapter is inserted in the adapter card slot and connected with the optical engine. Install the light engine at last casing and the lower casing bodily form hold the cavity in back, be connected light engine through inside optic fibre and optic fibre adapter, or with light engine and optic fibre adapter direct contact rigid connection, because inside optic fibre can not buckle, or the activity is little when optic fibre adapter rigid connection, lead to optic fibre adapter and light engine to have installation tolerance, be difficult for going into optic fibre adapter card in the adapter draw-in groove, consequently, this application separates adapter draw-in groove and lower casing, glue that injects the adapter draw-in groove through glue point hole and the side fixed connection of lower casing, so when the installation has installation tolerance in holding the cavity as light engine, can absorb the installation tolerance of light engine when installing the adapter draw-in groove to lower casing, the process is simple, can solve the more complicated problem of light engine installation tolerance.
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 diagram of an optical network unit;
fig. 3 is a schematic structural diagram of an optical module according to an embodiment of the present disclosure;
fig. 4 is an exploded structural diagram of an optical module according to an embodiment of the present disclosure;
fig. 5 is an exploded schematic view of a lower housing and an adapter card slot in an optical module according to an embodiment of the present disclosure;
fig. 6 is another exploded schematic view of an optical module according to an embodiment of the present disclosure, wherein the lower housing and the adapter card slot are formed in the lower housing;
fig. 7 is a schematic structural diagram of an adapter card slot in an optical module according to an embodiment of the present application;
fig. 8 is a top view of an optical module provided in the embodiment of the present application with an upper housing removed;
fig. 9 is a first partial assembly view of a lower shell and an adapter card slot in an optical module according to an embodiment of the present disclosure;
fig. 10 is a second partial assembly view of a lower shell and an adapter card slot in an optical module according to an embodiment of the present disclosure;
fig. 11 is a partially assembled view three of a lower housing and an adapter card slot in an optical module according to an embodiment of the present application;
fig. 12 is an assembly side view of a lower housing and an adapter card slot in an optical module according to an embodiment of the present disclosure;
fig. 13 is an exploded side view of a lower housing and an adapter card slot in an optical module according to an embodiment of the present disclosure;
fig. 14 is a schematic structural diagram of an upper housing of an optical module according to an embodiment of the present disclosure;
fig. 15 is a schematic view of another angular structure of an upper housing of an optical module according to an embodiment of the present disclosure.
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, an unlocking component 203, a circuit board 300, a tosa 400, a tosa 500, an adapter card slot 600, a first fiber adapter 700, and a second fiber adapter 800.
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 third shell, and the third shell covers the two side plates of the upper shell to form a wrapping cavity; the upper shell can also comprise two side walls which are positioned on two sides of the third shell and are perpendicular to the third shell, and the two side walls are combined with the two side plates to cover the upper shell on the lower shell.
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 the optical transmitter sub-module 400 and the optical receiver sub-module 500 inside the optical module; the optoelectronic devices such as the circuit board 300, the tosa 400, the rosa 500, the adapter card slot 600, the first fiber adapter 700, and the second fiber adapter 800 are located in the package cavity.
The assembly mode of combining the upper shell and the lower shell is adopted, so that the circuit board 300, the transmitter sub-module 400, the receiver sub-module 500, the adapter card slot 600, the first optical fiber adapter 700, the second optical fiber adapter 800 and other devices can be conveniently installed in the shells, and the outermost packaging protection shell of the optical module is formed by the upper shell and the lower shell; 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 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 connects the electrical appliances in the optical module together according to the circuit design through circuit wiring to realize the functions of power supply, electrical signal transmission, grounding and the like.
The chip on the circuit board 300 may be a multifunctional integrated chip, for example, a laser driver chip and an MCU chip are integrated into one chip, or a laser driver chip, a limiting amplifier chip and an MCU chip are integrated into one chip, and the chip is an integrated circuit, but the functions of the circuits do not disappear due to the integration, and only the circuit appears and changes, and the chip still has the circuit form. Therefore, when the circuit board is provided with three independent chips, namely, the MCU, the laser driver chip and the limiting amplifier chip, the scheme is equivalent to that when the circuit board 300 is provided with a single chip with three functions in one.
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 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 device through the flexible circuit board.
The optical engines of the transmitter sub-module 400 and the receiver sub-module 500 may be connected to one end of the optical fiber adapter through an internal optical fiber, and the other end of the optical fiber adapter is inserted into the adapter slot 600 and fixed. Because inside optic fibre can not buckle, and the inside optic fibre size of connecting optic fibre adapter and light engine is not good to be held, leads to behind the optic fibre adapter passing through inside optic fibre connection light engine, there is the deviation when the other end of optic fibre adapter inserts adapter draw-in groove 600 for the optic fibre adapter installation is more complicated.
The optical engines of the transmitter sub-module 400 and the receiver sub-module 500 may also be hard-wired to one end of the optical fiber adapter, that is, the end surface of the optical engine is directly connected to one end of the optical fiber adapter, and the other end of the optical fiber adapter is inserted into the adapter slot 600 and fixed. When there is a tolerance in the installation of the optical engine, there is a deviation in the insertion of the other end of the fiber optic adapter, which is hard-wired to the optical engine, into the adapter card slot 600, making the installation of the fiber optic adapter complicated.
In order to solve the above problems, according to the present invention, the lower housing 202 is separated from the adapter card slot 600 in the optical module, and the optical fiber adapter is connected to the optical engine through the internal optical fiber, or after the optical fiber adapter is hard-connected to the optical engine, the adapter card slot 600 is mounted on the lower housing 202, so as to eliminate the mounting tolerance of the optical fiber adapter and the optical engine.
Fig. 5 is an exploded schematic view of an optical module middle and lower housing 202 and an adapter card slot 600 provided in the embodiment of the present application, and fig. 6 is another angle exploded schematic view of the optical module middle and lower housing 202 and the adapter card slot 600 provided in the embodiment of the present application. As shown in fig. 5 and 6, in the optical module provided in the embodiment of the present application, the lower housing 202 is separated from the adapter card slot 600, after the optical engines such as the tosa 400 and the rosa 500 are mounted on the circuit board 300, the adapter card slot 600 is mounted at one end of the lower housing 202, and the adapter card slot 600 can absorb the mounting tolerance of the optical engine during mounting, so that the process is simple, the material cost does not need to be increased, and the long-term reliability risk exists.
Specifically, one end of the lower housing 202 facing the fiber optic adapter is provided with a mounting groove 2021, and two opposite side walls 2023 of the mounting groove 2021 are two opposite side walls of the lower housing 202; an opening is formed at one end of the mounting groove 2021 facing the adapter card slot 600, that is, the left end surface of the mounting groove 2021 is open, and the size of the opening is consistent with the distance between the two opposite side walls of the mounting groove 2021, so that the adapter card slot 600 can be inserted into the mounting groove 2021 through the opening of the mounting groove 2021.
In the embodiment of the present application, after the tosa 400 and the tosa 500 are mounted on the circuit board 300, when the adapter card slot 600 is mounted in the mounting groove 2021 of the lower housing 202, the adapter card slot 600 is gradually inserted into the mounting groove 2021 from left to right, so that two opposite sidewalls of the adapter card slot 600 contact two sidewalls of the mounting groove 2021 until the adapter card slot 600 is mounted in place.
An end of the lower case 202 near the mounting groove 2021 is provided with a mounting plate 2022, and one end of the mounting plate 2022 is connected to one side wall of the lower case 202 and the other end is connected to the other side wall of the lower case 202, thereby fixing the mounting plate 2022 in the lower case 202 in the front-rear direction. When the adapter card slot 600 is inserted into the mounting groove 2021, the side of the adapter card slot 600 facing the lower housing 202 contacts the side of the mounting plate 2022 to position the adapter card slot 600.
In the embodiment of the present application, after the tosa 400 and the tosa 500 are mounted on the circuit board 300, when the adapter card slot 600 is mounted in the mounting groove 2021 of the lower housing 202, the adapter card slot 600 is gradually inserted into the mounting groove 2021 from left to right, so that two opposite side walls of the adapter card slot 600 contact two side walls of the mounting groove 2021 until the side surface of the adapter card slot 600 abuts against the mounting plate 2022, and then the side walls of the adapter card slot 600 contacting with the mounting groove 2021 are fixed by glue, thereby fixing the adapter card slot 600 and the lower housing 202.
The mounting plate 2022 is provided with a through-hole mounting groove, which is a U-shaped groove with an open upper portion, and the optical fiber adapter can be inserted into the mounting groove for fixing. The mounting grooves of the mounting plate 2022 include a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove are arranged in the front-rear direction, the first mounting groove is close to the front side wall of the lower housing 202, and the second mounting groove is close to the rear side wall of the lower housing 202. The first fiber optic adapter 700 fits into the first mounting slot and the second fiber optic adapter 800 fits into the second mounting slot.
Fig. 7 is a schematic structural diagram of an adapter card slot 600 in an optical module according to an embodiment of the present application, and fig. 8 is a schematic structural diagram of an optical module according to an embodiment of the present application with an upper case 201 removed. As shown in fig. 7 and 8, the adapter card slot 600 provided in the embodiment of the present application includes two opposite side walls 610, a right side 620 facing the lower housing 202, and a left side, an upper surface, and a lower surface facing away from the lower housing 202, where through assembly holes are provided on the adapter card slot 600, and the assembly holes penetrate through the adapter card slot 600 and face towards the right side 620 of the lower housing 202 and face away from the left side of the lower housing 202. In this embodiment, the adapter card slot 600 is provided with a first assembly hole 630 and a second assembly hole 640 which are arranged side by side, and the first assembly hole 630 and the second assembly hole 640 are sequentially arranged along the front-back direction of the adapter card slot 600, that is, the first assembly hole 630 and the second assembly hole 640 are sequentially arranged along one side wall of the adapter card slot 600 to the direction of the other opposite side wall.
The first mounting hole 630 corresponds to the first fiber optic adapter 700, the external optical fiber passes through the first mounting hole 630 of the adapter card slot 600 to be connected with one end of the first fiber optic adapter 700, and the other end of the first fiber optic adapter 700 is connected with the tosa 400 through the internal optical fiber, so that the signal light emitted by the tosa 400 is transmitted to the external optical fiber through the first fiber optic adapter 700 to realize the emission of the signal light. The second assembly hole 640 corresponds to the second optical fiber adapter 800, the external optical fiber passes through the second assembly hole 640 of the adapter card slot 600 to be connected with one end of the second optical fiber adapter 800, and the other end of the second optical fiber adapter 800 is connected with the optical receiving sub-module 500 through the internal optical fiber, so that the signal light transmitted by the external optical fiber is transmitted to the optical receiving sub-module 500 through the second optical fiber adapter 800 to realize the reception of the signal light.
In order to conveniently insert the adapter card slot 600 into the mounting groove 2021 of the lower housing 202, the size of the front-back direction of the adapter card slot 600 is slightly smaller than the size of the front-back direction of the mounting groove 2021, so that the adapter card slot 600 can be inserted into the mounting groove 2021, the gap between the two opposite side walls of the adapter card slot 600 and the side walls of the mounting groove 2021 can be reduced, and the adapter card slot 600 and the side walls of the mounting groove 2021 can be conveniently fixed through glue.
The right end face of the adapter card slot 600 is provided with a U-shaped slot, the upper side of the U-shaped slot is open, the U-shaped slot is communicated with the assembly hole of the adapter card slot 600, and after the adapter card slot 600 is installed in the installation groove 2021 in the lower housing 202, the U-shaped slot on the right end face of the adapter card slot 600 is communicated with the assembly groove on the installation plate 2022 in the lower housing 202, and the first optical fiber adapter 700 and the second optical fiber adapter 800 are respectively embedded in the U-shaped slot after combination to support and fix the first optical fiber adapter 700 and the second optical fiber adapter 800.
Fig. 9 is a first partial assembly diagram of an optical module middle lower housing 202 and an adapter card slot 600 provided in an embodiment of the present application, fig. 10 is a second partial assembly diagram of an optical module middle lower housing 202 and an adapter card slot 600 provided in an embodiment of the present application, and fig. 11 is a third partial assembly diagram of an optical module middle lower housing 202 and an adapter card slot 600 provided in an embodiment of the present application. As shown in fig. 9, 10 and 11, after the optical engines such as the tosa 400 and the tosa 500 are mounted on the circuit board 300, the adapter card slot 600 is inserted into the mounting groove 2021 at one end of the lower housing 202 from left to right until the side 620 of the adapter card slot 600 facing the lower housing 202 abuts against the side of the mounting plate 2022 at one end of the lower housing 202, so that the adapter card slot 600 is mounted in the mounting groove 2021 of the lower housing 202 to absorb the mounting tolerance of the optical engine.
After the adapter card slot 600 is installed in the installation groove 2021 of the lower housing 202, for fixing the adapter card slot 600, glue is injected between the side surfaces of the adapter card slot 600 contacting the installation groove 2021 through the glue dispensing hole 2025 formed in the side wall opposite to the installation groove 2021, and the adapter card slot 600 is fixedly connected with the lower housing 202 through the glue. In this embodiment, when glue is injected through the glue dispensing hole 2025, at first, the contact surface between the adapter card slot 600 and the lower housing 202 is pre-fixed by the UV glue injected through the glue dispensing hole 2025, and then the contact surface between the adapter card slot 600 and the lower housing 202 is reinforced by the structural glue injected through the glue dispensing hole 2025, so as to ensure the installation fixity of the adapter card slot 600 and the lower housing 202.
When injecting glue through glue dispensing hole 2025, glue dispensing hole 2025 can make the fixed knot who is different in shape construct to conveniently inject glue into the interface of adapter draw-in groove 600 and lower casing 202 through this glue dispensing hole 2025, like rectangular hole, circular port or dysmorphism hole, with UV glue, structure glue pour into the interface of adapter draw-in groove 600 and lower casing 202 into through glue dispensing hole 2025 smoothly, guarantee adapter draw-in groove 600 and lower casing 202's fixed connection.
Fig. 12 is an assembled side view of an optical module middle lower housing 202 and an adapter card slot 600 provided in the embodiment of the present application, and fig. 13 is an exploded side view of an optical module middle lower housing 202 and an adapter card slot 600 provided in the embodiment of the present application. As shown in fig. 12 and 13, the bottom surface of the mounting groove 2021 at one end of the lower housing 202 provided in the embodiment of the present application may extend from the left end opening of the lower housing 202 to the mounting plate 2022 in the lower housing 202, so that the bottom surface of the adapter card slot 600 is adhered to the entire bottom surface of the mounting groove 2021; a notch 2024 may also be formed in the bottom surface of the mounting groove 2021 in the lower housing 202, the notch 2024 extends from one sidewall of the lower housing 202 to the other sidewall of the lower housing 202, and the left side of the notch 2024 is flush with the left end opening of the lower housing 202, so that the notch 2024 is in a U-shaped structure, that is, a certain distance exists between the left end surface of the mounting groove 2021 and the left end opening of the lower housing 202, and then extends to the mounting plate 2022 in the lower housing 202, so that the bottom surface of the right portion of the adapter card slot 600 is adhered to the bottom surface of the mounting groove 2021.
After the notch 2024 is formed at the left end of the mounting groove 2021, the bonding area between the bottom surface of the adapter card slot 600 and the bottom surface of the mounting groove 2021 can be reduced, glue is coated on the bottom surface of the adapter card slot 600, the adapter card slot 600 is moved into the mounting groove 2021 from left to right, and the glue on the bottom surface of the adapter card slot 600 bonds the bottom surface of the adapter card slot 600 and the bottom surface of the mounting groove 2021. After the area of the bottom surface of the mounting groove 2021 is reduced, the adhesion force between the adapter card slot 600 and the mounting groove 2021 can be reduced, so that the adapter card slot 600 can be conveniently mounted in the mounting groove 2021 of the lower housing 202, and the mounting tolerance of the light engines such as the light emitting sub-module 400 and the light receiving sub-module 500 can be reduced.
In this embodiment, not only can the left opening of the mounting groove 2021 in the lower housing 202 install the adapter card slot 600 into the mounting groove 2021 from left to right, but also the adapter card slot 600 can be installed into the mounting groove 2021 from top to bottom, the bottom surface of the adapter card slot 600 is coated with glue, the adapter card slot 600 is installed into the mounting groove 2021 from top to bottom, and when the bottom surface of the adapter card slot 600 contacts with the bottom surface of the mounting groove 2021, the glue on the bottom surface of the adapter card slot 600 bonds the adapter card slot 600 with the lower housing 202.
After the adapter card slot 600 is adhered to the bottom surface of the mounting groove 2021 in the lower housing 202, first, UV glue is injected between the sidewall 610 of the adapter card slot 600 and the sidewall 2023 of the mounting groove 2021 through the glue dispensing hole 2025 on the sidewall of the lower housing 202, so as to pre-fix the sidewall 610 of the adapter card slot 600 and the sidewall 2023 of the mounting groove 2021; structural glue is then injected between the side wall 610 of the adapter card slot 600 and the side wall 2023 of the mounting groove 2021 through the glue dispensing hole 2025 on the side wall of the lower housing 202 to reinforce the side wall 610 of the adapter card slot 600 and the side wall 2023 of the mounting groove 2021.
The upper surface of the adapter card slot 600 is a rugged surface, and includes a first side surface 650 and a second side surface 660, the first side surface 650 is far away from the left end surface of the lower housing 202, the second side surface 660 is close to the left end surface of the lower housing 202, the second side surface 660 is recessed in the first side surface 650, and the side surface of the upper housing 201 is press-fitted on the second side surface 660. In addition, the second side 660 of the adapter card slot 600 is open at the upper end to be assembled and fixed with the upper housing 201.
Fig. 14 is a schematic structural view of an upper housing 201 of an optical module according to an embodiment of the present disclosure, and fig. 15 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. 14 and 15, an avoiding hole 2011 is provided at one end of the upper casing 201 facing the adapter card slot 600, the avoiding hole 2011 corresponds to the first side surface 650 of the adapter card slot 600, and the avoiding hole 2011 faces the end surface opening of the adapter card slot 600, that is, the avoiding hole 2011 is located on the left side of the upper casing 201, the left end surface of the avoiding hole 2011 coincides with the left end surface of the upper casing 201, and the left end surface of the avoiding hole 2011 and the left end surface opening of the upper casing 201, so that the structure of the avoiding hole 2011 is a U-shaped hole.
When the upper shell 201 is covered on the lower shell 202, the first side surface 650 at the upper end of the adapter card slot 600 is embedded in the avoidance hole 2011 at the left side of the upper shell 201, so that the first side surface 650 of the adapter card slot 600 is flush with the upper surface of the upper shell 201; the side surface of the upper housing 201 close to the avoiding hole 2011 is press-fitted on the second side surface 660 of the adapter card slot 600 to limit the adapter card slot 600 up and down.
Upward be equipped with the recess on the side of casing 201 towards lower casing 202, the downside opening of this recess, this recess and adapter draw-in groove 600 right side part, the corresponding setting of upper end open-ended pilot hole for the recess of going up casing 201 lower surface forms complete pilot hole with the pilot hole combination on adapter draw-in groove 600 right side, the downside opening of recess and the upper portion opening looks accordant connection on adapter draw-in groove 600 right side in going up casing 201 promptly, with adapter draw-in groove 600 right side, upper portion open-ended pilot hole and the groove connection of last casing 201 downside.
In the embodiment of the present application, the grooves on the lower side of the upper housing 201 include a first groove 2012 and a second groove 2013, the first groove 2012 is in matching connection with the first assembling hole 630 of the adapter card slot 600, and the second groove 2013 is in matching connection with the second assembling hole 640 of the adapter card slot 600. Thus, external optical fibers can be conveniently connected with the tosa 400 and the tosa 500 on the circuit board 300 through the first and second assembling holes 630 and 640 in the adapter card slot 600.
For the pilot hole looks accordant connection on recess and the adapter draw-in groove 600 right side with last casing 201 downside, the left end face opening of going up casing 201 downside recess is linked together with the hole 2011 of dodging of last casing 201 left end to form the pilot hole that runs through terminal surface about adapter draw-in groove 600.
The optical module provided by the embodiment of the application comprises an upper shell, a lower shell, an optical engine, an adapter card slot and an optical fiber adapter, wherein the upper shell covers the lower shell to form an accommodating cavity; one end of the lower shell is provided with a glue dispensing hole, two opposite side surfaces of the adapter clamping groove are in contact with the side surface where the glue dispensing hole is located, and glue injected through the glue dispensing hole is fixedly connected with the side surface of the lower shell so as to realize movable connection between the adapter clamping groove and the lower shell, so that the mounting tolerance existing in the mounting of the light-emitting secondary module and the light-receiving secondary module can be absorbed; the side surface of the adapter clamping groove facing the upper shell is connected with the upper shell in a pressing mode, so that the adapter clamping groove is limited in the vertical direction through the upper shell; the optical fiber adapter is inserted in the adapter card slot and connected with the optical engine to realize optical transmission. This application is separated adapter draw-in groove and lower casing, install the light engine at last casing and the lower casing bodily form become hold the cavity after, pass through inside optical fiber connection to light engine with the one end of optical fiber adapter, the other end inserts in the adapter draw-in groove, pass through glue point hole injection's glue and the side fixed connection of casing down with the adapter draw-in groove again, so when there is installation tolerance in the installation of light engine holding the cavity, can absorb light engine when installing the adapter draw-in groove at lower casing, the installation tolerance of optical fiber adapter, the process is simple, the manufacturing degree of difficulty is lower, the more complicated problem of light engine installation tolerance has been solved, the long-term reliability of optical module has been guaranteed.
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 (10)
1. A light module, comprising:
one end of the lower shell is provided with a glue dispensing hole;
the upper shell covers the lower shell and forms an accommodating cavity with the lower shell;
the light engine is arranged in the accommodating cavity and used for realizing the emission or the reception of light;
the two opposite side surfaces of the adapter clamping groove are in contact with the side surface where the glue dispensing hole is located, and glue injected through the glue dispensing hole is fixedly connected with the side surface of the lower shell; the side surface of the upper shell facing the upper shell is connected with the upper shell in a pressing way;
and the optical fiber adapter is inserted in the adapter card slot and connected with the optical engine.
2. The optical module according to claim 1, wherein one end of the lower housing is provided with a mounting groove, an end of the mounting groove facing the adapter card slot is provided with an opening, and the adapter card slot is inserted into the mounting groove through the opening.
3. The optical module according to claim 2, wherein the glue dispensing hole is formed in the opposite side wall of the mounting groove, and the contact surface of the adapter card slot and the lower housing is pre-fixed by UV glue injected through the glue dispensing hole and reinforced by structural glue injected through the glue dispensing hole.
4. The optical module of claim 3, wherein the glue dispensing hole is shaped as a rectangular hole, a circular hole, or a profiled hole.
5. The optical module according to claim 2, wherein a mounting plate is provided at an end of the lower housing near the mounting groove, and one side of the mounting plate is in contact with a side surface of the adapter card slot facing the lower housing.
6. The optical module according to claim 5, wherein the mounting plate is provided with a mounting groove, an opening of the mounting groove faces the upper housing, and the optical fiber adapter is embedded in the mounting groove;
the adapter draw-in groove is equipped with the pilot hole that runs through, the pilot hole with the pilot hole communicates mutually.
7. The optical module of claim 6, wherein one end of the fiber adapter is inserted into the mounting hole, and the other end is connected to the optical engine through an internal optical fiber, and the optical engine cannot be bent;
or one end of the optical fiber adapter is inserted into the assembling hole, and the other end of the optical fiber adapter is in contact connection with the optical engine.
8. The optical module according to claim 1, wherein the side of the adapter card slot facing the upper housing includes a first side and a second side, the second side is recessed in the first side, and the side of the upper housing is press-fitted on the second side;
go up the casing orientation the one end of adapter draw-in groove is equipped with dodges the hole, dodge the hole orientation the terminal surface opening of adapter draw-in groove, first side is inserted dodge downtheholely.
9. The optical module according to claim 8, wherein a groove is formed on a side surface of the upper housing pressing the second side surface, and the groove is arranged corresponding to the assembly hole of the adapter card slot.
10. The optical module according to claim 8, wherein the first side surface embedded in the avoiding hole is flush with a side surface of the upper housing facing away from the lower housing.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110521317.XA CN113253400A (en) | 2021-05-13 | 2021-05-13 | Optical module |
| PCT/CN2022/083053 WO2022237347A1 (en) | 2021-05-13 | 2022-03-25 | Optical module |
| US18/204,333 US20230305248A1 (en) | 2021-05-13 | 2023-05-31 | Optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110521317.XA CN113253400A (en) | 2021-05-13 | 2021-05-13 | Optical module |
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| Publication Number | Publication Date |
|---|---|
| CN113253400A true CN113253400A (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110521317.XA Pending CN113253400A (en) | 2021-05-13 | 2021-05-13 | Optical module |
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| WO2022237347A1 (en) * | 2021-05-13 | 2022-11-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| WO2023077903A1 (en) * | 2021-11-05 | 2023-05-11 | 苏州旭创科技有限公司 | Optical module |
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