CN220381317U - Compact wavelength division multiplexer - Google Patents
Compact wavelength division multiplexer Download PDFInfo
- Publication number
- CN220381317U CN220381317U CN202321840457.4U CN202321840457U CN220381317U CN 220381317 U CN220381317 U CN 220381317U CN 202321840457 U CN202321840457 U CN 202321840457U CN 220381317 U CN220381317 U CN 220381317U
- Authority
- CN
- China
- Prior art keywords
- wavelength division
- division multiplexer
- prism
- triangular prism
- fiber collimator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000013307 optical fiber Substances 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims description 72
- 239000011521 glass Substances 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical group [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 claims description 5
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 3
- 239000005304 optical glass Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 23
- 239000010408 film Substances 0.000 description 44
- 239000000835 fiber Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 208000034656 Contusions Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000034526 bruise Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model discloses a compact wavelength division multiplexer, which comprises a wavelength division multiplexer body, a reflecting film and an incident optical fiber collimator; the wavelength division multiplexer body is provided with a long side and a short side, a reflecting surface and a light-transmitting surface are arranged in the direction of the long side, and the light-transmitting surface is divided into an emergent section and an incident section; the reflective film comprises a first part attached to the incident section and a second part extending out of the wavelength division multiplexer body; the transmitting end of the incident optical fiber collimator faces the second part, the incident optical fiber collimator is positioned on the outer side of the short side of the wavelength division multiplexer body, and the incident optical fiber collimator is spaced from and parallel to the short side of the wavelength division multiplexer body. The compact wavelength division multiplexer is additionally provided with the reflecting film, and the direction of light rays emitted by the incident optical fiber collimator is changed through the reflecting film, so that the wavelength division multiplexer body and the incident optical fiber collimator can be longitudinally arranged, the transverse arrangement design in the existing design is replaced, the requirement on space is reduced, and the compact design is realized.
Description
Technical Field
The utility model belongs to the technical field of optical module components and parts, and particularly relates to a compact wavelength division multiplexer.
Background
Wavelength division multiplexers are devices for separating optical signals with different wavelengths, and are important devices for the application of the wavelength division multiplexing technology. The structure of the existing wavelength division multiplexer is generally shown in fig. 1, an optical signal enters from an incident optical fiber collimator, λ1 passes through a prism transmission film and exits from a dielectric film first filter; after being reflected by the dielectric thin film filter and the prism reflection film, the lambda 2, the lambda 3 and the lambda 4 are emitted from the dielectric thin film second filter; after being reflected by the second filter of the dielectric film and the prism reflection film, the lambda 3 and the lambda 4 are emergent from the third filter of the dielectric film; and finally, after being reflected by the third filtering and prism reflecting film of the dielectric film, the lambda 4 is emergent from the fourth filtering sheet of the dielectric film, thereby realizing the wavelength division multiplexing function.
The existing wavelength division multiplexer has the following defects: the incident fiber collimator is arranged laterally to the glass plate, resulting in insufficient space to fix the collimator. One solution in the prior art is to reduce the size of the collimator, which also requires an increased cost, in order to ensure that there is sufficient space to fix the collimator.
Disclosure of Invention
It is an object of the present utility model to provide a compact wavelength division multiplexer for solving the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a compact wavelength division multiplexer comprises a wavelength division multiplexer body, a reflecting film and an incident optical fiber collimator;
the wavelength division multiplexer body is provided with a long side and a short side, two opposite side surfaces are arranged in the long side direction, one side surface is configured as a reflecting surface, the other side surface is configured as a light transmission surface, and the light transmission surface is divided into an emergent section and an incident section;
the reflective film comprises a first part attached to the incident section and a second part extending out of the wavelength division multiplexer body;
the transmitting end of the incident optical fiber collimator faces the second part, the incident optical fiber collimator is positioned on the outer side of the short side of the wavelength division multiplexer body, and the incident optical fiber collimator is spaced from and parallel to the short side of the wavelength division multiplexer body.
In one possible design, the wavelength division multiplexer body comprises a glass plate and an optical filter array, wherein the glass plate has two opposite side surfaces, the two side surfaces are respectively configured as the reflecting surface and the light transmitting surface, and the optical filter array comprises a plurality of optical filters;
the glass plate is provided with the long side and the short side, the incident optical fiber collimator is parallel to the short side direction of the glass plate, and the optical filters are sequentially abutted on the emergent section of the light-transmitting surface along the long side direction of the glass plate.
In one possible design, the reflective surface is coated with an internal reflective film and the reflective surface is coated with an anti-reflection film; the optical filter is provided with four WDM films which are respectively plated.
In one possible design, the WDM film includes a substrate, high refractive index layers and low refractive index layers, with the high refractive index layers and low refractive index layers being plated alternately on the substrate.
In one possible design, the substrate is WMS-15, the high refractive index layer is tantalum pentoxide, and the low refractive index layer is silicon dioxide.
In one possible design, the reflective film includes a first triangular prism, a trapezoidal prism, and a second triangular prism, which are sequentially connected and form a square structure;
the trapezoid prism is provided with a bottom surface and a top surface which are opposite, the bottom surface and the top surface are connected through two inclined surfaces, a part of the bottom surface of the trapezoid prism is attached to an incident section of the light-transmitting surface, and the rest part of the bottom surface of the trapezoid prism extends out of the glass plate;
correspondingly, the inclined plane comprises a first inclined plane and a second inclined plane, the trapezoid prism is connected with the first triangular prism through the first inclined plane and forms the first part, the trapezoid prism is connected with the second prism through the second inclined plane and forms the second part, and the trapezoid prism is abutted to the optical filter array through the first triangular prism.
In one possible design, the first triangular prism is a 42.34-degree triangular prism, and the second triangular prism is a 41-degree triangular prism; and the first triangular prism and the second triangular prism are both made of optical grade glass.
In one possible design, the bottom surface and the top surface of the trapezoid prism are respectively configured as light-transmitting surfaces, the first inclined surface and the second inclined surface are respectively plated with a high-reflection film with R being more than 99.7% @[email protected] +/-2 degrees, and the high-reflection films are plated on the trapezoid prism through magnetron sputtering coating.
The beneficial effects are that:
the compact wavelength division multiplexer is additionally provided with the reflecting film, the direction of light rays emitted by the incident optical fiber collimator is changed through the reflecting film, and the wavelength division multiplexer body and the incident optical fiber collimator can be longitudinally arranged on the basis of realizing wavelength division multiplexing, so that the design of transverse arrangement in the existing design is replaced, the requirement on space is reduced, and the compact design is realized.
Meanwhile, light rays emitted by the incident optical fiber collimator are reflected twice through the reflecting film, so that the light rays smoothly enter the wavelength division multiplexer body, the propagation distance of the light rays in the transverse direction is effectively reduced, the folding of an optical path is realized, and the space occupied by the compact wavelength division multiplexer in the transverse direction is reduced.
Drawings
Fig. 1 is a schematic diagram of a conventional wavelength division multiplexer.
Fig. 2 is a schematic diagram of a compact wavelength division multiplexer.
In the figure:
1. a wavelength division multiplexer body; 11. a glass plate; 12. an optical filter array; 101. a reflecting surface; 102. a light-transmitting surface; 103. a light filter; 121. a first optical filter; 122. a second optical filter; 123. a third filter; 124. a fourth optical filter; 2. a reflective film; 21. a first triangular prism; 22. a trapezoidal prism; 23. a second triangular prism; 221. a bottom surface; 222. a top surface; 223. a first inclined surface; 224. a second inclined surface; 3. an incident fiber collimator.
Detailed Description
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present utility model, but is not intended to limit the present utility model.
Examples:
as shown in fig. 2, a compact wavelength division multiplexer includes a wavelength division multiplexer body 1, a reflection film 2, and an incident optical fiber collimator 3;
the wavelength division multiplexer body 1 has a long side and a short side, two opposite sides are arranged in the long side direction, one side is configured as a reflecting surface 101, the other side is configured as a light-transmitting surface 102, and the light-transmitting surface 102 is divided into an emergent section and an incident section;
the reflecting film 2 comprises a first part attached to the incident section and a second part extending to the outside of the wavelength division multiplexer body 1;
the emitting end of the incident optical fiber collimator 3 faces the second part, the incident optical fiber collimator 3 is positioned on the outer side of the short side of the wavelength division multiplexer body 1, and the incident optical fiber collimator 3 is spaced from and parallel to the short side of the wavelength division multiplexer body 1.
The compact wavelength division multiplexer is additionally provided with the reflecting film 2, the direction of light rays emitted by the incident optical fiber collimator 3 is changed through the reflecting film 2, and the wavelength division multiplexer body 1 and the incident optical fiber collimator 3 can be longitudinally arranged on the basis of realizing wavelength division multiplexing, so that the design of transverse arrangement in the existing design is replaced, the requirement on space is reduced, and the compact design is realized.
Meanwhile, the light emitted by the incident optical fiber collimator 3 is reflected twice through the reflecting film 2, so that the light smoothly enters the wavelength division multiplexer body 1, the propagation distance of the light in the transverse direction is effectively reduced, and the folding of an optical path is realized, so that the space occupied by the compact wavelength division multiplexer in the transverse direction is reduced.
In operation, the incident optical fiber collimator 3 is activated, and the incident optical fiber collimator 3 emits an optical signal, which is incident on the second portion and reflected by the reflective film 2 into the wavelength division multiplexer body 1. After the reflected light is reflected and transmitted for multiple times in the wavelength division multiplexer body 1, that is, the optical signal propagates back and forth between the reflecting surface 101 and the transmitting surface, a plurality of emergent lights are finally obtained, and the working principle of the wavelength division multiplexer body 1 is known to those skilled in the art and is not described herein again.
It will be readily appreciated that the input fiber collimator 3 may be of any suitable commercially available type, and the utility model is not limited in this regard.
In this embodiment, the wavelength division multiplexer body 1 includes a glass plate 11 and an optical filter array 12, where the glass plate 11 has two opposite sides, and the two sides are respectively configured as the reflecting surface 101 and the light-transmitting surface 102, and the optical filter array 12 includes a plurality of optical filters 103;
the glass plate 11 has the long side and the short side, the incident fiber collimator 3 is parallel to the short side direction of the glass plate 11, and the optical filters 103 are sequentially abutted on the exit section of the light-transmitting surface 102 along the long side direction of the glass plate 11.
Based on the above design, after the optical signal enters the glass plate 11, the optical signal propagates along the glass plate 11 until the reflection surface 101 reflects, so that the optical signal reflects and propagates toward the optical filter 103 closest to the reflective film 2 in the optical filter array 12, the optical filter 103 transmits the optical signal with a specific wavelength, and reflects the optical signals with other wavelengths; the optical signals of the other wavelengths propagate to the reflecting surface 101 until being reflected again, propagate to the next optical filter 103, and then transmit the optical signals of the specific wavelengths again. The above process is repeated until the optical signal is incident on the last filter 103. Based on this, the plurality of filters 103 can filter out the plurality of transmitted light.
In one possible implementation, the reflective surface 101 is coated with an internal reflective film 2 and the transmissive surface 102 is coated with an anti-reflection film. Based on the above design, the reflective surface 101 forms a high reflection coating surface by the internal reflection coating 2, the light-transmitting surface 102 forms an antireflection coating surface by an antireflection coating, the former enhances the reflection effect, and the latter enhances the light-emitting effect.
In one possible implementation, the optical filter 103 is provided with four and is respectively coated with WDM (Wavelength Division Multiplexing ) films. Based on the above design, the corresponding optical filters 103 have the capability of selectively transmitting through the WDM film, so as to realize screening of light.
As shown in fig. 2, the four optical filters 103 are named as a first optical filter 121, a second optical filter 122, a third optical filter 123 and a fourth optical filter 124 in order, and the optical signals are reflected by the reflecting surface 101 of the glass block and then transmitted through the light transmitting surface 102 to be sequentially incident on the first optical filter 121, the second optical filter 122, the third optical filter 123 and the fourth optical filter 124. Optionally, the first filter transmits the optical signal with the central wavelength of 1309.14nm and reflects the optical signals with other wavelengths; the second filter transmits the optical signal with the central wavelength of 1304.56nm and reflects the optical signals with other wavelengths; the third filter transmits the optical signal with the central wavelength of 1300.05nm and reflects the optical signals with other wavelengths; the fourth filter transmits an optical signal of the center wavelength 1295.56nm and reflects optical signals of other wavelengths.
In one possible implementation, the WDM film includes a substrate, high refractive index layers, and low refractive index layers, with the high refractive index layers and the low refractive index layers being plated alternately on the substrate. Based on the design scheme, the WDM film has the capability of selective transmission through different combination forms of the high refractive index layer and the low refractive index layer for different use conditions.
Optionally, the substrate is WMS-15, the high refractive index layer is tantalum pentoxide, and the low refractive index layer is silicon dioxide. Based on the above design, WMS-15 is a glass ceramic substrate for DWDM (Dense Wavelength Division Multiplexing, dense optical multiplexing) optical communication dielectric multilayer filter 103, and any other suitable commercial model may be selected according to the use requirement. The tantalum pentoxide can be used for manufacturing high-quality optical films with good transparency, higher refractive index, compact film structure, stable chemical property, firm mechanical property, hard damage of strong laser and the like, and the silicon dioxide has the advantages of stable chemical property, low cost, high transparency, low scattering property, high refractive index and the like, and the tantalum pentoxide and the silicon dioxide are matched with each other to manufacture refractive layers with different refractive indexes.
In the present embodiment, the reflective film 2 includes a first triangular prism 21, a trapezoidal prism 22, and a second triangular prism 23, and the first triangular prism 21, the trapezoidal prism 22, and the second triangular prism 23 are sequentially connected and form a square structure;
the trapezoidal prism 22 has a bottom surface 221 and a top surface 222 which are opposite, the bottom surface 221 and the top surface 222 are connected by two inclined surfaces, a part of the bottom surface 221 of the trapezoidal prism 22 is attached to the incident section of the light-transmitting surface 102, and the rest part of the bottom surface 221 of the trapezoidal prism 22 extends out of the glass plate 11;
accordingly, the inclined planes include a first inclined plane 223 and a second inclined plane 224, the trapezoidal prism 22 is connected to the first triangular prism 21 through the first inclined plane 223 and forms the first portion, the trapezoidal prism 22 is connected to the second prism through the second inclined plane 224 and forms the second portion, and the trapezoidal prism 22 abuts against the filter array 12 through the first triangular prism 21.
Based on the above design scheme, the reflecting film 2 forms a square structure so as to facilitate the lamination of the reflecting film 2 on the outer side of the glass plate 11, improve the lamination and reduce the influence on optical signals, and also facilitate the reduction of edges and corners and the reduction of bruise. Meanwhile, the trapezoid prism 22 is abutted to the optical filter array 12 through the first triangular prism 21, so that all components outside the glass plate 11 are tightly connected, and the probability of component falling is reduced.
In operation, the incident fiber collimator 3 emits an optical signal, and the optical signal is emitted into the trapezoidal prism 22, sequentially passes through the second triangular prism 23 and the first triangular prism 21, and is reflected twice to enter the glass plate 11.
Optionally, the first triangular prism 21 is a 42.34-degree triangular prism, and the second triangular prism 23 is a 41-degree triangular prism; and the materials of the first triangular prism 21 and the second triangular prism 23 are optical grade glass. It will be readily appreciated that the two inclined surfaces of the trapezoidal prism 22 are configured at an angle adapted so that the reflective film 2 constitutes a square structure. At the same time, the direction of the optical line number is also guided so that the wavelength division multiplexer body 1 realizes the wavelength division multiplexing function.
Optionally, the bottom surface 221 and the top surface 222 of the trapezoidal prism 22 are respectively configured as the light-transmitting surface 102, the first inclined surface 223 and the second inclined surface 224 are respectively coated with a high-reflection film with R >99.7% @[email protected] + -2 DEG, and the high-reflection films are coated on the trapezoidal prism 22 through magnetron sputtering coating.
Based on the above design, the bottom surface 221 of the trapezoidal prism 22 is preferably configured as a polished surface, which improves the polishing degree, so as to improve the propagation performance of the optical signal and reduce the loss of the optical signal. And it is easily understood that the specific polishing degree can be selected according to the use requirement.
The first inclined surface 223 and the second inclined surface 224 are coated with a high reflection film, wherein the retroreflection coefficient R of the high reflection film is more than 99.7 percent@[email protected] +/-2 degrees, wherein 99.7 percent is reflectivity, 1240-1360nm is the wavelength of an optical signal, and 5.31+/-2 degrees is the incident angle range of the optical signal.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. A compact wavelength division multiplexer, which is characterized by comprising a wavelength division multiplexer body (1), a reflecting film (2) and an incident optical fiber collimator (3);
the wavelength division multiplexer body (1) is provided with a long side and a short side, two opposite side surfaces are arranged in the long side direction, one side surface is configured as a reflecting surface (101), the other side surface is configured as a light transmission surface (102), and the light transmission surface (102) is divided into an emergent section and an incident section;
the reflecting film (2) comprises a first part attached to the incident section and a second part extending to the outside of the wavelength division multiplexer body (1);
the transmitting end of the incident optical fiber collimator (3) faces the second part, the incident optical fiber collimator (3) is positioned on the outer side of the short side of the wavelength division multiplexer body (1), and the incident optical fiber collimator (3) and the short side of the wavelength division multiplexer body (1) are spaced and parallel to each other.
2. The compact wavelength division multiplexer of claim 1, wherein the wavelength division multiplexer body (1) comprises a glass plate (11) and an optical filter array (12), wherein the glass plate (11) has two opposite sides configured as the reflective surface (101) and the light transmissive surface (102), respectively, and the optical filter array (12) comprises a number of optical filters (103);
the glass plate (11) has the long side and the short side, the incident optical fiber collimator (3) is parallel to the short side direction of the glass plate (11), and the optical filters (103) are sequentially abutted on the emergent section of the light-transmitting surface (102) along the long side direction of the glass plate (11).
3. The compact wavelength division multiplexer according to claim 2, wherein the reflecting surface (101) is coated with an internal reflecting film (2), and the light transmitting surface (102) is coated with an antireflection film; the optical filters (103) are provided with four and are respectively plated with WDM films.
4. A compact wavelength division multiplexer as recited in claim 3, characterised in that the WDM film comprises a substrate, high refractive index layers and low refractive index layers, the high refractive index layers and low refractive index layers being plated alternately on the substrate.
5. The compact wavelength division multiplexer of claim 4 wherein the substrate is WMS-15, the high refractive index layer is tantalum pentoxide, and the low refractive index layer is silicon dioxide.
6. The compact wavelength division multiplexer according to claim 1, wherein the reflective film (2) comprises a first triangular prism (21), a trapezoidal prism (22) and a second triangular prism (23), and the first triangular prism (21), the trapezoidal prism (22) and the second triangular prism (23) are sequentially connected and form a square structure;
the trapezoid prism (22) is provided with a bottom surface (221) and a top surface (222) which are opposite, the bottom surface (221) and the top surface (222) are connected through two inclined surfaces, a part of the bottom surface (221) of the trapezoid prism (22) is attached to an incident section of the light-transmitting surface (102), and the rest part of the bottom surface (221) of the trapezoid prism (22) extends out of the glass plate (11);
correspondingly, the inclined planes comprise a first inclined plane (223) and a second inclined plane (224), the trapezoid prism (22) is connected with the first triangular prism (21) through the first inclined plane (223) and forms the first part, the trapezoid prism (22) is connected with the second prism through the second inclined plane (224) and forms the second part, and the trapezoid prism (22) is abutted to the optical filter array (12) through the first triangular prism (21).
7. The compact wavelength division multiplexer of claim 6 wherein the first triangular prism (21) is a 42.34 ° triangular prism and the second triangular prism (23) is a 41 ° triangular prism; and the first triangular prism (21) and the second triangular prism (23) are made of optical glass.
8. The compact wavelength division multiplexer according to claim 6, wherein the bottom surface (221) and the top surface (222) of the trapezoidal prism (22) are respectively configured as a light transmitting surface (102), the first inclined surface (223) and the second inclined surface (224) are coated with a highly reflective film with R >99.7% @[email protected] ± 2 °, and the highly reflective film is coated on the trapezoidal prism (22) by magnetron sputtering coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321840457.4U CN220381317U (en) | 2023-07-12 | 2023-07-12 | Compact wavelength division multiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321840457.4U CN220381317U (en) | 2023-07-12 | 2023-07-12 | Compact wavelength division multiplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220381317U true CN220381317U (en) | 2024-01-23 |
Family
ID=89559684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321840457.4U Active CN220381317U (en) | 2023-07-12 | 2023-07-12 | Compact wavelength division multiplexer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220381317U (en) |
-
2023
- 2023-07-12 CN CN202321840457.4U patent/CN220381317U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105938222B (en) | compact wavelength division multiplexer based on small-angle filter plate | |
| KR102438548B1 (en) | Wavelength selection filter and light irradiation apparatus | |
| EP0209344A2 (en) | Optical mixing/demixing device | |
| CN100489566C (en) | Reflex mirror and optical pickup | |
| CN109917516B (en) | Compact wavelength division multiplexer | |
| CN105158853A (en) | Novel integrated micro-optical wavelength division multiplexing module, and method of multiplexing and demultiplexing by employing module | |
| CN115343795B (en) | Diffraction optical waveguide and imaging system | |
| CN213240587U (en) | Compact optical wavelength division multiplexing demultiplexing device | |
| CN210982809U (en) | Compact optical path hybrid device | |
| US20040033014A1 (en) | Optical demultiplexer and optical multiplexer for wavelength division multiplex communication | |
| JP2007206225A (en) | Polarization conversion element | |
| CN220381317U (en) | Compact wavelength division multiplexer | |
| US7315420B2 (en) | CWDM filter with four channels | |
| JP4364617B2 (en) | Composite etalon element and laser device using the composite etalon element | |
| CN212515131U (en) | Miniature single-side light-emitting wavelength division multiplexing/demultiplexing device and optical module | |
| CN110456519B (en) | Polarization beam splitter, preparation method thereof and polarization beam splitting method | |
| CN109212670A (en) | A kind of wavelength division multiplex device and corresponding optical module | |
| CN211627868U (en) | Polarization maintaining film and total reflection polarization maintaining prism | |
| CN110412667A (en) | Multilayered structure optical thin film | |
| JP2008276074A (en) | Filter for optical communication, and module for optical communication using the same | |
| CN213581439U (en) | Wavelength division multiplexing structure | |
| CN109802745B (en) | 8-channel wavelength division multiplexing/demultiplexing device for 200G/400G optical transceiver module | |
| GB2070275A (en) | Interference mirrors | |
| KR100903657B1 (en) | Line beam generator and manufacturing process of the same | |
| US7580188B2 (en) | CWDM filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |