CN215264138U - High-performance single-fiber three-dimensional passive wavelength division optical device - Google Patents
High-performance single-fiber three-dimensional passive wavelength division optical device Download PDFInfo
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- CN215264138U CN215264138U CN202121256701.3U CN202121256701U CN215264138U CN 215264138 U CN215264138 U CN 215264138U CN 202121256701 U CN202121256701 U CN 202121256701U CN 215264138 U CN215264138 U CN 215264138U
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Abstract
The invention belongs to a high-performance single-fiber three-dimensional passive wavelength division optical device.A matching port is formed on a base shell, and an emitting end, two receiving ends and a filter seat are installed on the base shell through the matching port, wherein the emitting end comprises a laser diode, a seal welding pipe body and an adjusting ring, and the laser diode is fixed with the base shell through the adjusting ring after being fixed with the seal welding pipe body; the through-hole has been seted up in the axial of filter seat, and the one end of filter seat is located the base casing and is equipped with the light filter installation notch with the through-hole intercommunication, and the other end is located the base casing and just is fixed with the tail fiber adapter outward, and the lock pin of tail fiber adapter inserts the through-hole, and the advantage lies in: the structure design of a device product is optimized, in the base structure, an assembly structure with a base shell and an optical filter seat separated in two parts is adopted, and an assembly method of flip coupling is matched, so that the position of the optical filter seat in the base shell and the position of the tail fiber adapter in the optical filter seat are fixed, and the focal distance and the position of the ferrule of the tail fiber adapter and a receiving end are ensured.
Description
Technical Field
The invention belongs to the field of optical fiber communication, and particularly relates to a high-performance single-fiber three-dimensional passive wavelength division optical device.
Background
As shown in fig. 1, the pigtail type single-fiber three-way optical device in the market at present is mainly assembled in the following way: the laser diode at the transmitting end and the base are fixed in a press fit and welding mode, the tail fiber adapter is subjected to X/Y/Z triaxial coupling, is welded in an overlapped mode through an adjusting ring, and is coupled with the two receiving ends. However, due to the long/short focal length or the optical path deviation of the laser diode at the emitting end, the coupling position of the pigtail adapter is irregularly changed, and the unfixed property of the pigtail adapter affects the coupling at the receiving end, which results in a great loss of the yield/efficiency of the product process.
Disclosure of Invention
The invention aims to provide a high-performance single-fiber three-dimensional passive wavelength division optical device which is simple in structure and convenient to assemble and can effectively solve the problem of receiving end coupling yield/efficiency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a high-performance single-fiber three-dimensional passive wavelength division optical device comprises a base shell, wherein a matching port is formed in the base shell, an emitting end, two receiving ends and a filter seat are installed on the base shell through the matching port, the emitting end comprises a laser diode, a seal welding pipe body and an adjusting ring, and the laser diode is fixed with the base shell through the adjusting ring after being fixed with the seal welding pipe body; the optical filter base is characterized in that a through hole is formed in the axial direction of the optical filter base, one end of the optical filter base is located in the base shell and is provided with an optical filter installation notch communicated with the through hole, the other end of the optical filter base is located outside the base shell and is fixedly provided with a tail fiber adapter, and the inserting core of the tail fiber adapter is inserted into the through hole.
Furthermore, an isolator is fixed at one end of the filter seat in the base shell.
Further, the optical filter mounting notches comprise a first 45-degree inclined notch corresponding to one of the receiving ends and a second 45-degree inclined notch corresponding to the other receiving end, and the first 45-degree inclined notch and the second 45-degree inclined notch are oppositely arranged and are respectively provided with a 45-degree optical filter.
Further, the optical filter mounting notches comprise 0-degree horizontal notches located between the 45-degree inclined notch I and the other receiving end, and 0-degree optical filters are mounted on the 0-degree horizontal notches.
Furthermore, an optical filter support is fixed on one of the receiving ends, an installation cavity is formed in the optical filter support, an opening at one end of the installation cavity is used for covering a lens of the receiving end, and an opening at the other end of the installation cavity is covered with a 0-degree optical filter.
Further, the cooperation mouth department of being connected with the filter seat is equipped with the step of indent, is equipped with the limiting plate that is spacing by the step and agrees with the cooperation mouth on the filter seat outer wall, the filter seat passes through the limiting plate to be fixed with the base casing, and the tail optical fiber adapter passes through the limiting plate to be fixed with the filter seat.
Furthermore, the matching port connected with the optical filter seat is provided with at least one limiting surface.
The invention has the advantages that:
1. the structure is suitable for a flip-chip coupling mode, namely, the pigtail adapter is fixed firstly, then the laser diode is coupled, the best position meeting the product performance requirement is found and then the position is welded and fixed, the stability of the optical path of a receiving end can be effectively ensured, and the coupling efficiency and the yield are improved to a great extent;
2. the structural design of a device product is optimized, in the base structure, an assembly structure with a base shell and an optical filter seat separated in two parts is adopted, and the optical filter seat is connected with a bridge between the base shell and a tail fiber adapter, so that the device has the advantages of simple structure and convenience in assembly; the position of the optical filter seat in the base shell and the position of the tail fiber adapter in the optical filter seat are fixed by matching with the assembly method of the flip coupling and the arrangement of the limiting structure, so that the focal distance and the position of the ferrule of the tail fiber adapter and the receiving end are ensured; meanwhile, the problem that the optical filter is damaged by the tail fiber insertion core can be completely avoided by adopting limit control (namely a limit plate on the optical filter seat);
3. the receiving end provided with the 0-degree optical filter adopts the optical filter support to install the 0-degree optical filter, and the optical filter support can completely seal the lens of the receiving end detector, so that other interference light can be more effectively prevented from entering to influence the working performance of the receiving end detector.
Drawings
FIG. 1 is a schematic diagram of a single-fiber three-way optical device in the prior art;
FIG. 2 is a schematic three-dimensional structure of the triplexer in the embodiment;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a schematic cross-sectional view of the single-fiber three-way optical device in an embodiment;
FIG. 5 is a schematic three-dimensional structure of a base housing and a filter holder according to an embodiment;
FIG. 6 is a schematic three-dimensional structure of a filter holder according to an embodiment;
description of the reference symbols
The laser module comprises a 1310nm laser diode 1, a seal welding pipe body 2, an adjusting ring 3, a base shell 4, a 1550 detector 5, an isolator 6, a 0-degree optical filter I7, an optical filter seat 8, a tail fiber adapter 9, a 45-degree optical filter I10, a 45-degree optical filter II 11, curing glue 12, a 0-degree optical filter II 13, a 0-degree optical filter support 14, a 1490nm detector 15, an inward concave step 16 and a limiting plate 17.
Detailed Description
The present invention will be described in further detail with reference to examples.
This embodiment provides a high performance single fiber three-dimensional passive wavelength division optical device, as shown in fig. 2 to 5, including base casing 4, four mating ports have been seted up altogether in four directions about base casing 4, install an emission end, two receiving terminals and a filter seat 8 on four mating ports respectively. The transmitting end comprises a 1310nm laser diode 1, a seal welding pipe body 2 and an adjusting ring 3, and the 1310nm laser diode 1 and the seal welding pipe body 2 are fixed and then fixed with the base shell 4 through the adjusting ring 3. The axial of optical filter seat 8 is seted up the through-hole, and the one end of optical filter seat 8 is located base casing 4 and is equipped with the light filter installation notch with the through-hole intercommunication, and the other end is located base casing 4 outside and be fixed with tail fiber adapter 9, and the lock pin of tail fiber adapter 9 inserts the through-hole. The cooperation mouth department of being connected with filter seat 8 is equipped with the step 16 of indent, is equipped with the limiting plate 17 that is spacing by the step and agrees with the cooperation mouth on the 8 outer walls of filter seat, filter seat 8 passes through limiting plate 17 and 4 fixed connection of base casing, tail optical fiber adapter 9 passes through limiting plate 17 and 8 fixed connection of filter seat. Depending on the product model, the isolator 6 may also be fixed at the end of the filter holder 8 located inside the base housing 4. Limiting structure that limiting plate 17 and step 16 of indent formed, the degree of depth that steerable optical filter seat 8 inserted base casing 4, limiting plate 17 can restrict the depth of insertion of tail optical fiber adapter 9 again simultaneously (tail optical fiber adapter 9 shell is supported by limiting plate 17), make the position of optical filter seat 8 in base casing 4, the position of tail optical fiber adapter 9 in optical filter seat 8 is fixed, the focus distance and the position of 9 lock pins of tail optical fiber adapter and receiving terminal have been guaranteed, this limiting structure simultaneously, the problem that the tail optical fiber lock pin can also be avoided completely to bruise the light filter.
In this embodiment, one of the receiving terminals includes a 1490nm detector 15, the other receiving terminal includes a 1550nm detector 5, the filter mounting notch includes a first 45 ° slanted notch corresponding to the 1550nm detector 5 and a second 45 ° slanted notch corresponding to the 1490nm detector 15, the first 45 ° slanted notch and the second 45 ° slanted notch are arranged oppositely, and the first 45 ° slanted notch is provided with a first 45 ° filter 10, and the second 45 ° slanted notch is provided with a second 45 ° filter 11. In order to prevent other interference light from entering the receiving end to affect the working performance of the receiving end, the optical filter mounting notch of the embodiment comprises a 0-degree horizontal notch positioned between a 45-degree inclined notch I and the 1550nm detector 5, the 0-degree horizontal notch I is provided with a 0-degree optical filter I7, the light entering the 1550nm detector 5 can only enter through the 0-degree optical filter I7, and the entering of the interference light is effectively blocked; meanwhile, the receiving end of the 1490nm detector 15 in the embodiment further comprises an optical filter support 14, the optical filter support 14 is provided with a mounting cavity, an opening at one end of the mounting cavity is gradually reduced from outside to inside, so that the lens of the 1490nm detector 15 can be just covered, an opening at the other end of the mounting cavity is smaller than the area of the second 0-degree optical filter 13 and is covered with the second 0-degree optical filter, and due to the fact that the optical filter support 14 is adopted to seal the lens, light can only enter from the second 0-degree optical filter 13, and due to the design, other interference light can be effectively blocked, and therefore the working performance of the 1490nm detector 15 is guaranteed.
As shown in fig. 5, after the filter holder 8 is press-fitted into the assembly opening, in order to prevent the filter holder 8 from rotating relative to the base housing 4, the fitting opening connected to the filter holder 8 is set to be a D-shaped fitting opening (i.e. forming a limiting surface) in this embodiment, and the limiting plate 17 also needs to be set to be a D-shaped to ensure the engagement, so as to prevent the filter holder 8 from rotating. In addition, because the matching opening is D-shaped, the accurate installation of the position of the optical filter seat 8 can be ensured in the inserting process.
The working principle of the single-fiber three-dimensional optical device is as follows:
firstly, 1310nm laser diode 1 light beams enter a pigtail adapter 9 to be transmitted after passing through an optical isolator 6, a 45-degree optical filter II 11 and a 45-degree optical filter I10;
secondly, the tail fiber adapter 9 inputs light to the 45-degree optical filter I10 to be reflected, and the light passes through the 0-degree optical filter I7 to be received by the 1550nm detector 5;
thirdly, the input light of the tail fiber adapter 9 passes through the first 45-degree optical filter 10, is reflected by the second 45-degree optical filter 11, passes through the second 0-degree optical filter 13, and is received by the 1490nm detector 15.
The inverted coupling type assembling method of the single-fiber three-way optical device specifically comprises the following steps:
s01, the laser diode and the seal welding pipe body 2 are sealed and welded tightly by using resistance welding;
s02, press-fitting the optical filter seat 8 into the base shell 4, then adhering the first 0-degree optical filter 7, the first 45-degree optical filter 10 and the second 0-degree optical filter to the optical filter seat 8, selectively installing the isolator 6 according to the product type, and then baking and curing;
s03, inserting the tail fiber adapter 9 into the through hole of the optical filter seat 8, and then welding and fixing the tail fiber adapter 9, the optical filter seat 8 and the base shell 4 through laser;
s04, carrying out X/Y/Z triaxial coupling on the laser diode, and when the laser diode reaches the required specification of a product, overlapping and welding the laser diode with the base shell 4 through the adjusting ring 3;
s05, firstly pasting a 1490nm detector 15, a 0-degree optical filter bracket 14 and a 0-degree optical filter II 13, baking at high temperature, curing, inputting light with specified wavelength through a tail fiber adapter 9, coupling the receiving end, pre-fixing by irradiating UV glue with an ultraviolet lamp when coupling response current reaches the required specification, filling by using curing glue 12, baking at high temperature, and curing;
and S06, inputting light with a specified wavelength through a tail fiber adapter 9, coupling the 1550nm detector 5, pre-fixing the coupled response current by irradiating UV glue with an ultraviolet lamp when the coupled response current reaches the required specification, filling the coupled response current with curing glue 12, and baking and curing at high temperature.
The above-mentioned embodiments are merely illustrative of the inventive concept and are not intended to limit the scope of the invention, which is defined by the claims and the insubstantial modifications of the inventive concept can be made without departing from the scope of the invention.
Claims (7)
1. The utility model provides a passive wavelength division optical device of high performance single fiber three-dimensional, includes the base casing, has seted up the cooperation mouth on the base casing and has installed transmitting terminal, two receiving terminals and filter seat, its characterized in that through the cooperation mouth: the transmitting end comprises a laser diode, a seal welding pipe body and an adjusting ring, and the laser diode is fixed with the seal welding pipe body and then fixed with the base shell through the adjusting ring; the optical filter base is characterized in that a through hole is formed in the axial direction of the optical filter base, one end of the optical filter base is located in the base shell and is provided with an optical filter installation notch communicated with the through hole, the other end of the optical filter base is located outside the base shell and is fixedly provided with a tail fiber adapter, and the inserting core of the tail fiber adapter is inserted into the through hole.
2. The high performance triplexer passive wavelength division multiplexing device of claim 1, wherein: and an isolator is fixed at one end of the optical filter seat positioned in the base shell.
3. The high performance triplexer passive wavelength division multiplexing device of claim 1, wherein: the filter mounting notches comprise a first 45-degree inclined notch corresponding to one receiving end and a second 45-degree inclined notch corresponding to the other receiving end, and the first 45-degree inclined notch and the second 45-degree inclined notch are oppositely arranged and are respectively provided with a 45-degree filter.
4. The high performance triplexer passive wavelength division multiplexing device of claim 3, wherein: the optical filter mounting notches comprise 0-degree horizontal notches located between the 45-degree inclined notch I and the other receiving end, and 0-degree optical filters are mounted on the 0-degree horizontal notches.
5. The high performance triplexer passive wavelength division multiplexing device of claim 1, wherein: one of the receiving ends is fixed with a light filter support, the light filter support is provided with a mounting cavity, an opening at one end of the mounting cavity is used for covering the lens of the receiving end, and an opening at the other end of the mounting cavity is covered with a 0-degree light filter.
6. The high performance triplexer passive wavelength division multiplexing device of claim 1, wherein: the cooperation mouth department of being connected with the optical filter seat is equipped with the step of indent, is equipped with on the optical filter seat outer wall by the spacing limiting plate that agrees with the cooperation mouth of step, the optical filter seat passes through the limiting plate to be fixed with the base casing, and the tail optical fiber adapter passes through the limiting plate to be fixed with the optical filter seat.
7. The high performance triplexer passive wavelength division multiplexing device of claim 1, wherein: the matching opening connected with the filter seat is provided with at least one limiting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121256701.3U CN215264138U (en) | 2021-06-07 | 2021-06-07 | High-performance single-fiber three-dimensional passive wavelength division optical device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121256701.3U CN215264138U (en) | 2021-06-07 | 2021-06-07 | High-performance single-fiber three-dimensional passive wavelength division optical device |
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| Publication Number | Publication Date |
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| CN215264138U true CN215264138U (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121256701.3U Active CN215264138U (en) | 2021-06-07 | 2021-06-07 | High-performance single-fiber three-dimensional passive wavelength division optical device |
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- 2021-06-07 CN CN202121256701.3U patent/CN215264138U/en active Active
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