CN215005964U

CN215005964U - Wavelength division demultiplexer

Info

Publication number: CN215005964U
Application number: CN202120705679.XU
Authority: CN
Inventors: 蔡文龙; 张祥波; 黄望隆
Original assignee: Wuhan Yilut Technology Co ltd
Current assignee: Wuhan Yilut Technology Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-12-03
Anticipated expiration: 2031-04-07

Abstract

The utility model provides a wavelength division demultiplexer, relating to the technical field of optical communication; a wavelength division demultiplexer comprising: the device comprises a shell, an LC adapter, a glass block, two aspheric lenses and a dual-channel optical fiber array; the LC adapter and the dual-channel optical fiber array are respectively arranged at two ends of the shell; the glass block is fixedly arranged in the shell and is used for dividing an incident beam output by the LC adapter into two parallel output beams; the two non-spherical lenses are fixedly arranged in the shell and are positioned on the same side of the glass block; two non-ball lenses are used for focusing two bundles of output light beams and inputting into two optic fibre of binary channels fiber array respectively, focus two bundles of output light beams that are parallel to each other through non-ball lens and toward same direction input to two optic fibre of binary channels fiber array in, need not install fiber connection structure respectively at the both ends of wavelength division demultiplexer, can receive two bundles of output light beams through a binary channels fiber array, convenient to use.

Description

Wavelength division demultiplexer

Technical Field

The utility model relates to an optical communication technical field especially relates to a wavelength division demultiplexer.

Background

A wavelength division demultiplexer is a device for separating a light beam in an optical fiber into two or more beams, and is generally used in conjunction with the wavelength division demultiplexer.

The existing wavelength division demultiplexer separates an incident beam into two beams of output beams, and the beams are respectively output from two ends of the wavelength division demultiplexer in two opposite directions and cannot be output from one end of the wavelength division demultiplexer in the same direction, so that the use is inconvenient.

Disclosure of Invention

The utility model discloses aim at solving current wavelength division demultiplexer and will incidenting beam separation and become two bundles of behind the beam output, from wavelength division demultiplexer's both ends toward two opposite direction outputs respectively, can not follow wavelength division demultiplexer's one end toward same direction output, lead to using not convenient enough technical problem.

The utility model provides a wavelength division demultiplexer, include: the device comprises a shell, an LC adapter, a glass block, two aspheric lenses and a dual-channel optical fiber array;

the LC adapter and the dual-channel optical fiber array are respectively arranged at two ends of the shell;

the glass block is fixedly arranged in the shell and is used for dividing an incident beam output by the LC adapter into two parallel output beams;

the two aspheric lenses are fixedly arranged in the shell and are positioned on the same side of the glass block; the two aspheric lenses are respectively used for focusing the two output light beams and inputting the two output light beams into the two optical fibers of the dual-channel optical fiber array.

In some preferred embodiments, the glass block is a parallelogram structure; a reflecting film and a first antireflection film are arranged on the light input surface of the glass block; a second antireflection film and an optical film are arranged on the light output surface, which is parallel to the light input surface, of the glass block; the first antireflection film is used for transmitting the input light beam; the optical film is used for selectively transmitting one light beam according to the wavelength of light in the input light beam and reflecting the other light beam to the reflecting film; the reflection diaphragm is used for reflecting the light beam reflected by the optical diaphragm; the second antireflection film is used for transmitting the light beam reflected by the reflection film.

In some more preferred embodiments, the light input face is angled 76-81 degrees from the lower end face of the glass block.

In some preferred embodiments, the LC adapter includes an outer metal sleeve, an inner metal sleeve, a ferrule, and a fiber collimator;

the ceramic sleeve and the inner metal sleeve are respectively and coaxially arranged at two ends in the outer metal sleeve; one end of the optical fiber collimator is inserted into the inner metal sleeve, and the other end of the optical fiber collimator extends to the outside of the outer metal sleeve; one end of the ceramic ferrule is inserted into one end in the ceramic sleeve, and the other end of the ceramic ferrule is inserted into the inner metal sleeve and connected with the optical fiber collimator; the other end of the ceramic sleeve is used for inserting an external LC connector; and a connecting optical fiber is arranged in the ceramic ferrule and used for guiding light input by the external LC connector into the optical fiber collimator.

In some preferred embodiments, the LC adapter and the dual channel fiber array are each secured to the housing by glue.

In some preferred embodiments, the glass block and the aspheric lens are fixed to the inner side wall of the housing by glue, respectively.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the utility model provides a wavelength division demultiplexer, a serial communication port, include: the device comprises a shell, an LC adapter, a glass block, two aspheric lenses and a dual-channel optical fiber array; the LC adapter and the dual-channel optical fiber array are respectively arranged at two ends of the shell; the glass block is fixedly arranged in the shell and is used for dividing an incident beam output by the LC adapter into two parallel output beams; the two aspheric lenses are fixedly arranged in the shell and are positioned on the same side of the glass block; the two aspheric lenses are respectively used for focusing two output light beams and inputting the two output light beams into two optical fibers of the dual-channel optical fiber array; the glass block separates a beam of light output by the LC adapter into two parallel output beams, the two aspheric lenses are arranged on the same side of the glass block, the two parallel output beams are focused by the aspheric lenses and input to two optical fibers of the dual-channel optical fiber array in the same direction, an optical fiber connecting structure is not required to be installed at two ends of the wavelength division demultiplexer respectively, and the two output beams can be received through the dual-channel optical fiber array, so that the use is convenient.

Drawings

Fig. 1 is a schematic diagram of an optical path and a structure of a wavelength division demultiplexer according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an exploded structure of the WDM of FIG. 1;

FIG. 3 is a schematic longitudinal cross-sectional view of a glass block 3 in the wavelength division demultiplexer of FIG. 1;

FIG. 4 is a schematic diagram of an LC adapter in the wavelength division demultiplexer of FIG. 1;

FIG. 5 is a schematic cross-sectional view of the LC adapter of FIG. 4 in the A-A direction;

wherein, 1, a shell; 2. an LC adapter; 201. an outer metal sleeve; 202. a ceramic sleeve; 203. an inner metal sleeve; 204. a ceramic ferrule; 205. a fiber collimator; 206. connecting an optical fiber; 3. a glass block; 301. a first antireflection film; 302. an optical film; 303. a reflective membrane; 304. a second antireflection film; 4. an aspherical lens; 5. a dual channel fiber array.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Referring to fig. 1 and 2, an embodiment of the present invention provides a wavelength division demultiplexer, including: the device comprises a shell 1, an LC adapter 2, a glass block 3, two aspheric lenses 4 and a dual-channel optical fiber array 5.

The LC adapter 2 and the dual-channel optical fiber array 5 are respectively arranged at two ends of the shell 1; the LC adapter 2 and the dual-channel optical fiber array 5 are fixed with the shell 1 through glue respectively.

The glass block 3 is fixedly arranged in the shell 1 and is used for dividing an incident beam output by the LC adapter 2 into two parallel output beams; the glass block 3 is fixed with the inner side wall of the shell 1 through glue.

The two aspheric lenses 4 are fixedly arranged in the shell 1 and are positioned at the same side of the glass block 3; the two non-spherical lenses 4 are distributed in the shell 1 from top to bottom; the two aspheric lenses 4 are respectively used for focusing the two output light beams and inputting the two output light beams into two optical fibers of the dual-channel optical fiber array 5; the two non-spherical lenses 4 are respectively fixed with the inner side wall of the shell 1 through glue.

Specifically, referring to fig. 3, the glass block 3 has a parallelogram structure; a reflecting film 303 and a first antireflection film 301 are arranged on the light input surface of the glass block 3; the reflecting film 303 and the first antireflection film 301 are arranged on the light input surface up and down; a second antireflection film 304 and an optical film 302 are arranged on the light output surface of the glass block 3, which is parallel to the light input surface; a second antireflection film 304 and an optical film 302 are arranged above and below the light output surface; the first antireflection film 301 is used for transmitting the input light beam and reducing the light loss of the input light beam; the optical membrane 302 is used for selectively transmitting one light beam according to the wavelength of light in the input light beam and reflecting the other light beam onto the reflecting membrane 303; the reflective membrane 303 is used for reflecting the light beam reflected by the optical membrane 302; second antireflection film 304 is for transmitting the light beam reflected by reflective film 303 and reducing the light loss of the output light beam passing through second antireflection film 304.

Specifically, in the present embodiment, the included angle α between the light input surface and the lower end surface of the glass block 3 is 76 degrees; as a variation of this embodiment, the angle α between the light input surface and the lower end surface of the glass block 3 may also be 81 degrees.

It should be noted that the first antireflection film 301, the second antireflection film 304, the reflective film 303, and the optical film 302 are prior art; therefore, the specific material and type thereof will not be described herein.

Illustratively, the optical film 302 may be a thin film filter TFF.

Specifically, referring to fig. 4 and 5, LC adapter 2 includes an outer metal sleeve 201, an inner metal sleeve 203, a ferrule sleeve 202, a ferrule 204, and a fiber collimator 205; the ceramic sleeve 202 and the inner metal sleeve 203 are respectively and coaxially arranged at two ends in the outer metal sleeve 201; one end of the optical fiber collimator 205 is inserted into the inner metal sleeve 203, and the other end extends to the outside of the outer metal sleeve 201; one end of the ceramic ferrule 204 is inserted into one end of the ceramic sleeve 202, and the other end is inserted into the inner metal sleeve 203 and connected with the optical fiber collimator 205 and fixed by glue; the other end of the ceramic sleeve 202 is used for inserting an external LC connector; a connecting optical fiber 206 is arranged in the ceramic ferrule 204 and is used for guiding light input by an external LC connector into an optical fiber collimator 205; when in use, the wavelength division demultiplexer is connected with an external LC connector through the LC adapter 2, and an external light source is led onto the glass block 3.

Referring to fig. 1, the wavelength division demultiplexer in the present embodiment operates as follows:

an input light beam containing light of wavelengths λ 1 and λ 2 enters the housing 1 through the LC adapter 2; the input light beam is divided into two light beams after being incident on the optical diaphragm 302 through the first antireflection film 301 and the glass block 3; after passing through the optical diaphragm 302, the light beam with the wavelength λ 1 is focused into one optical fiber in the dual-channel optical fiber array 5 through an aspheric lens 4; the light beam with the wavelength of λ 2 is reflected by the optical diaphragm 302 onto the reflection diaphragm 303, reflected by the reflection diaphragm 303 and passes through the second antireflection film 304, and then is focused by another aspheric lens 4 and input into another optical fiber of the dual-channel optical fiber array 5, thereby realizing the separation of the light beam.

In the wavelength division demultiplexer in this embodiment, one light beam output by the LC adapter 2 is separated into two parallel output light beams by the glass block 3, two aspheric lenses 4 are disposed on the same side of the glass block 3, the two parallel output light beams are focused by the aspheric lenses 4 and input to two optical fibers of the dual-channel optical fiber array 5 in the same direction, an optical fiber connection structure is not required to be respectively mounted at two ends of the wavelength division demultiplexer, and the two output light beams can be received by the dual-channel optical fiber array 5, so that the wavelength division demultiplexer is convenient to use.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A wavelength division demultiplexer, comprising: the device comprises a shell, an LC adapter, a glass block, two aspheric lenses and a dual-channel optical fiber array;

2. The wavelength division demultiplexer of claim 1, wherein the glass block is a parallelogram structure; a reflecting film and a first antireflection film are arranged on the light input surface of the glass block; a second antireflection film and an optical film are arranged on the light output surface, which is parallel to the light input surface, of the glass block; the first antireflection film is used for transmitting the incident beam; the optical film is used for selectively transmitting one light beam according to the wavelength of the light in the incident light beam and reflecting the other light beam to the reflecting film; the reflection diaphragm is used for reflecting the light beam reflected by the optical diaphragm; the second antireflection film is used for transmitting the light beam reflected by the reflection film.

3. The wavelength division demultiplexer of claim 2, wherein the angle between the light input face and the lower end face of the glass block is 76-81 degrees.

4. The wavelength division demultiplexer of claim 1, wherein the LC adapter comprises an outer metal sleeve, an inner metal sleeve, a ceramic sleeve, a ferrule, and a fiber collimator;

5. The wavelength division demultiplexer of claim 1, wherein the LC adapter and the dual channel fiber array are each secured to the housing by glue.

6. The wavelength division demultiplexer of claim 1, wherein the glass block and the aspheric lens are fixed to an inner sidewall of the housing by glue, respectively.