CN213240587U - Compact optical wavelength division multiplexing demultiplexing device - Google Patents
Compact optical wavelength division multiplexing demultiplexing device Download PDFInfo
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- CN213240587U CN213240587U CN202022385377.7U CN202022385377U CN213240587U CN 213240587 U CN213240587 U CN 213240587U CN 202022385377 U CN202022385377 U CN 202022385377U CN 213240587 U CN213240587 U CN 213240587U
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Abstract
The utility model relates to a compact optical wavelength division multiplexing demultiplexing device, its including input collimator, at least two output collimator, base plate, with the light filter that output collimator quantity and position correspond, the base plate includes first surface, side surface and second surface, the light filter sets up on the first surface, the first surface with the contained angle of side table is less than 90, and the light beam that the input collimator sent incides to the second surface after the side surface total reflection, accept the part of input collimator light beam in second surface one side and form a plane of reflection, the plane of reflection makes the input beam reflect the back, and the output beam through the light filter is parallel with the light beam from the output of input collimator. The device has the advantages of simple structure, small size, easy assembly, better parameters, high reliability, small size, simple structure, contribution to assembly, high coupling efficiency and better parameters, and is suitable for the development trend of increasingly miniaturization of optical fiber communication transmission device modules.
Description
Technical Field
The utility model relates to a wavelength division multiplexing technical field, especially a compact optics wavelength division multiplexing demultiplexing device.
Background
Wavelength Division Multiplexing (WDM) is a rapidly evolving technology that can greatly increase the amount of aggregate data that can be transmitted over an optical fiber. Each data channel is transmitted at a unique wavelength and the wavelengths are selected such that the channels do not interfere with each other and the optical transmission loss of the fiber is low. Therefore, the wavelength division multiplexing/demultiplexing optical structure or device is rapidly developed and widely applied. Currently, in the prior art, as shown in fig. 1, a light beam enters a substrate after being collimated by a common-end optical fiber collimator, the substrate mainly comprises two parallel optical surfaces, both of which are polished and ground surfaces, wherein a first surface is coated with an antireflection film, a plurality of optical filters are arranged on the first surface, a second surface is coated with a reflection film, and the light beam enters the substrate at an angle of a °, and then exits from each optical filter at an angle of-a °, and is received by the optical fiber collimator. At the moment, the common collimator and other collimators are distributed at 2a degrees, so that the whole system is large in volume. In another prior art, as shown in fig. 2, a triangular prism is added at the common end of the substrate to deflect and incident an incident beam, so that the common collimator and other collimators can be arranged in parallel, and the volume is reduced.
Therefore, a compact optical wavelength division multiplexing demultiplexing device is provided to solve the problems of overlarge device volume, collimated light deformation and low coupling efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a compact optics wavelength division multiplexing demultiplexing device to solve the device volume too big, collimated light deformation, problem that coupling efficiency is low.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a compact optical wavelength division multiplexing demultiplexing device comprising: the light source comprises an input collimator, at least two output collimators, a substrate and light filters, wherein the number and the positions of the light filters correspond to those of the output collimators, the substrate comprises a first surface, a side surface and a second surface, the light filters are arranged on the first surface, an antireflection film is plated on the first surface, the included angle between the first surface and the side surface is smaller than 90 degrees, light beams emitted by the input collimator are totally reflected on the side surface and then enter the second surface, a part of one side of the second surface, which receives the light beams of the input collimator, forms a reflecting surface, and the reflecting surface enables the output light beams passing through the light filters to be parallel to the light beams output from the input collimator after the input light beams are reflected.
As a further optimization, the lower end face of the second surface is plated with a reflecting film or adhered with a reflector.
As a further optimization, an included angle between the side surface and the reflection surface is, the reflection surface is a part of the substrate, and the upper end surface of the second surface is plated with a reflection film or adhered with a reflector.
As a further optimization, a triangular prism is adhered to the upper end face of the second surface, an antireflection film is plated on the front end face of the triangular prism, a reflection film is plated on the rear end face of the triangular prism, the reflection surface is the rear end face of the triangular prism, and the included angle between the side surface and the rear end face of the triangular prism is 90 °.
Compared with the prior art, the utility model discloses an advantage is with positive effect: the light beam is collimated by the output end collimator and then enters the first surface of the substrate at an angle of a degrees, the angle between the first surface and the side surface is smaller than 90 degrees, and the geometrical relationship shows that the distance between the output collimator and the first output collimator is determined by an angle b, and the smaller the angle b is, the larger the distance is. When the light beam is incident on the side surface, because the incident angle is larger than the critical angle, total reflection is generated, the rear light beam is incident on the second surface, the light beam is reflected to the optical filter of the first surface again, the optical filter transmits a certain range of wavelengths and receives the wavelengths by the first output collimator, the other part of the wavelengths are reflected to the second surface, the second surface reflects the light beam to the second optical filter, and the like, the light beams are respectively filtered and received by other collimators. The device has the advantages of simple structure, small size, easy assembly, better parameters, high reliability, small size, simple structure, contribution to assembly, high coupling efficiency and better parameters, and is suitable for the development trend that optical fiber communication transmission device modules are increasingly miniaturized, so that the device has good advantages and application prospects in similar products in a comprehensive view.
Drawings
FIG. 1 is a schematic diagram of a prior art self-referencing apparatus;
FIG. 2 is a schematic diagram of another prior art self-referencing apparatus;
fig. 3 is a schematic diagram of an apparatus according to an embodiment of the present invention;
fig. 4 is a schematic view of an apparatus according to another embodiment of the present invention;
description of the labeling: 1-input collimator, 2-output collimator, 3-substrate, 31-first surface, 32-side surface, 33-second surface, 4-filter, 5-triangular prism, 6-reflector.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The utility model discloses a compact optics wavelength division multiplexing demultiplexing device, as shown in fig. 3 and 4, include: the light source comprises an input collimator 1, at least two output collimators 2, a substrate 3 and optical filters 4 corresponding to the number and positions of the output collimators, wherein the substrate 3 comprises a first surface 31, a side surface 32 and a second surface 33, the optical filters 4 are arranged on the first surface 31, the first surface 31 is plated with an antireflection film, an included angle between the first surface 31 and the side surface 32 is smaller than 90 degrees, a light beam emitted by the input collimator 1 is totally reflected by the side surface 32 and then enters the second surface 33, a part of one side of the second surface 33, which receives the light beam of the input collimator, forms a reflecting surface, after the light beam is reflected by the reflecting surface, an output light beam passing through the optical filters 4 is parallel to the light beam output from the input collimator, and after the light beam passes through the upper end surface of the second surface 33, the light beam horizontally reflects to the first surface 31, the collimator 2 receives the light beam passing through the optical filters 4, the first surface 31 is parallel to the lower end surface of the second surface 33, and the lower end surface of the second surface 33 horizontally reflects the light beam to the first surface 31. The process and principle are as follows: the first surface 31 is coated with an antireflection film, the output end collimator 1 is horizontally arranged, the light beam passes through the input end collimator 1 and then is collimated to be incident on the first surface 31 of the substrate 3 at an angle of a degrees, an angle b between the first surface 31 and the side surface 32 is smaller than 90 degrees, and the geometric relationship shows that the distance between the input collimator and the first output collimator is determined by the angle b, and the smaller the angle b is, the larger the distance is. When light beams are incident on the side surface, total reflection is generated because the incident angle is larger than the critical angle, the rear light beams are incident on the second surface, the second surface is divided into an upper end surface and a lower end surface, the light beams are totally reflected on the side end surface and then reflected to the first surface 31 through the upper end surface of the second surface 33, the optical filter transmits a certain range of wavelengths and receives the wavelengths to the first output collimator, the other part of the wavelengths are reflected to the second surface, the lower end surface of the second surface horizontally reflects the light beams to the optical filter of the first surface again, the second optical filter receives the light beams through the second output collimator after filtering, and so on, in the embodiment, 4 collimators are taken as an example, the light beams are respectively filtered and received by the third output collimator and the fourth output collimator.
Further, in order to reflect the light beam reflected to the second surface out of the substrate, the lower end surface of the second surface 33 is plated with a reflective film or adhered with a reflector. The lower end surface of the second surface is plated with a reflecting film or is adhered with a reflector, and the lower end surface of the second surface horizontally reflects the light beam to the optical filter and then is received by the output collimator.
Example one
The compact optical wavelength division multiplexing/demultiplexing device of the present invention is shown in fig. 3.
Furthermore, in order to greatly reduce the volume of the product, the input collimator and other output collimators for receiving light are arranged in parallel, the light beam totally reflected to the second surface is horizontally reflected to the first surface and received by the output collimator, the included angle between the side surface (32) and the reflecting surface is 90 degrees, the reflecting surface is a part of the substrate (3), the upper end surface of the second surface (33) is plated with a reflecting film or is adhered with a reflecting mirror (6), the angle b between the first surface 31 and the side surface 32 is smaller than 90 degrees, the light beam totally reflected to the second surface is horizontally reflected to the first surface, and the incident light beam and the emergent light beam are parallel.
Example two
Further, as shown in fig. 4, in order to greatly reduce the volume of the product, the input collimator and other output collimators receiving light are placed in parallel, the light beam totally reflected to the second surface is horizontally reflected to the first surface to be received by the light output collimator, a triangular prism (5) is adhered to the upper end surface of the second surface (33), an antireflection film is plated on the front end surface of the triangular prism (5), a reflection film is plated on the rear end surface of the triangular prism (5), the reflection surface is the rear end surface of the triangular prism (5), and an included angle between the side surface (32) and the rear end surface of the triangular prism (5) is 90 °. The triangular prism is used for deflecting reflected light, horizontally reflecting the light beam to the light collimator, and placing the input end collimator and other receiving light collimators in parallel, so that the volume of the product is greatly reduced. The upper end face and the lower end face of the second surface are the same plane, the main body substrate is a glass parallel flat plate, the two optical surfaces are parallel and are plated with antireflection films, and the triangular prism is adhered to the second surface. The light beam is collimated to be incident to the first surface in an alpha degree after passing through the input end collimator, the angle b between the first surface and the side surface is smaller than 90 degrees, when the light beam is incident to the side surface, total reflection is generated because the incident angle is larger than a critical angle, the rear light beam is incident and penetrates through the second surface to enter the triangular prism, the front end surface of the triangular prism is coated with an antireflection film, the rear end surface of the triangular prism is coated with a reflecting film, the light beam is reflected by the reflecting film to enter the parallel flat plate again, partial wavelength transmission of the light beam is received by the optical fiber output collimator, partial reflected wavelength is reflected to the second surface by the optical filter and is reflected to the optical filter by the triangular prism, and the like, the light is.
The device has the advantages of simple structure, small size, easy assembly, better parameters, high reliability, small size, simple structure, contribution to assembly, high coupling efficiency and better parameters, and is suitable for the development trend that optical fiber communication transmission device modules are increasingly miniaturized, so that the device has good advantages and application prospects in similar products in a comprehensive view.
The above detailed description of the embodiments of the present invention has been made in conjunction with the accompanying drawings and the working principle of the present invention has been explained, but the present invention is not limited thereto, and various changes made within the knowledge range possessed by the skilled in the art without departing from the gist of the present invention are all within the protection scope of the present invention.
Claims (4)
1. A compact optical wavelength division multiplexing demultiplexing device, comprising: the light source comprises an input collimator (1), at least two output collimators (2), a substrate (3) and light filters (4) corresponding to the number and the positions of the output collimators, wherein the substrate (3) comprises a first surface (31), side surfaces (32) and a second surface (33), the light filters (4) are arranged on the first surface (31), an antireflection film is plated on the first surface (31), an included angle between the first surface (31) and the side surfaces (32) is smaller than 90 degrees, light beams emitted by the input collimator (1) are incident to the second surface (33) after being totally reflected by the side surfaces (32), a part of one side of the second surface (33) bearing the light beams of the input collimator forms a reflecting surface, and after the input light beams are reflected by the reflecting surface, the output light beams passing through the light filters (4) are parallel to the light beams output from the input collimator.
2. The compact optical wavelength division multiplexing-demultiplexing device according to claim 1, wherein: the lower end surface of the second surface (33) is plated with a reflecting film or is adhered with a reflector (6).
3. The compact optical wavelength division multiplexing-demultiplexing device according to claim 1, wherein: the included angle between the side surface (32) and the reflecting surface is 90 degrees, the reflecting surface is a part of the substrate (3), and the upper end surface of the second surface (33) is plated with a reflecting film or is adhered with a reflector (6).
4. The compact optical wavelength division multiplexing-demultiplexing device according to claim 1, wherein: triangular prism (5) are pasted to the up end of second surface (33), antireflection coating has been plated to the preceding terminal surface of triangular prism (5), and the reflecting film has been plated to the rear end face of triangular prism (5), the plane of reflection does the rear end face of triangular prism (5), side surface (32) with the rear end face contained angle of triangular prism (5) is 90.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022385377.7U CN213240587U (en) | 2020-10-23 | 2020-10-23 | Compact optical wavelength division multiplexing demultiplexing device |
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| CN202022385377.7U CN213240587U (en) | 2020-10-23 | 2020-10-23 | Compact optical wavelength division multiplexing demultiplexing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777713A (en) * | 2021-08-04 | 2021-12-10 | 深圳市深光谷科技有限公司 | Integrated mode multiplexing optical chip |
| CN114094431A (en) * | 2021-10-30 | 2022-02-25 | 深圳中科飞测科技股份有限公司 | Laser beam optimizing device and laser |
| US11782215B2 (en) | 2022-01-06 | 2023-10-10 | Browave Corporation | Optical device |
-
2020
- 2020-10-23 CN CN202022385377.7U patent/CN213240587U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777713A (en) * | 2021-08-04 | 2021-12-10 | 深圳市深光谷科技有限公司 | Integrated mode multiplexing optical chip |
| CN113777713B (en) * | 2021-08-04 | 2024-03-12 | 深圳市深光谷科技有限公司 | Integrated mode multiplexing optical chip |
| CN114094431A (en) * | 2021-10-30 | 2022-02-25 | 深圳中科飞测科技股份有限公司 | Laser beam optimizing device and laser |
| US11782215B2 (en) | 2022-01-06 | 2023-10-10 | Browave Corporation | Optical device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211101 Address after: No.5 Lianfeng Avenue, Zhuhai Free Trade Zone, Guangdong 519030 Patentee after: ZHUHAI FTZ OPLINK COMMUNICATIONS, Inc. Address before: 519000 room 3001, building 39, Shidai Shanhuhai phase 5, aviation new town, Jinwan District, Zhuhai City, Guangdong Province Patentee before: Lv Chengjiang |
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| TR01 | Transfer of patent right |