CN214375398U

CN214375398U - Wavelength division multiplexing device

Info

Publication number: CN214375398U
Application number: CN202120612787.2U
Authority: CN
Inventors: 余战方
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-10-08
Anticipated expiration: 2031-03-25

Abstract

The utility model discloses a wavelength division multiplexing device, which comprises a main body, wherein a light processing mechanism is arranged in the main body, and the light processing mechanism comprises an optical fiber fixer, a collimator, an optical filter and an optical reflector; the optical fiber fixer is used for fixing optical fibers and is provided with at least one optical fiber input end and at least two optical fiber output ends; the optical filter is arranged behind the collimator and is used for enabling the optical signal with the selected wavelength to transmit; the collimator can reversely project the optical signal which does not penetrate through the optical filter to one of the optical fiber output ends; the optical reflector is arranged behind the optical filter and used for reflecting the optical signal output from the optical filter back to the optical fiber fixer and changing the optical path of the received optical signal to enable the optical signal to enter the other optical fiber output end; the wavelength division multiplexing device shares one set of optical fiber fixer and collimator for transmitting and receiving optical signals through the arrangement of the reflector, thereby greatly reducing the product cost and reducing the product volume.

Description

Wavelength division multiplexing device

Technical Field

The utility model relates to a multi-wavelength integrated wavelength division multiplexing device technical field especially relates to a wavelength division multiplexing device.

Background

In recent years, the whole optical communication market is rapidly increased, due to the application of optical technology, the traditional electric scheme is replaced, the optical communication is not limited to the transmission specialty, and all communication base stations, home gateways, routers, switches, servers and core network devices have optical communication shadows. The integration of various signals into one optical fiber for transmission is a necessary choice, and meanwhile, the requirements of users on the definition of video and the stability of networks are higher and higher, and the wavelength division multiplexing technology is widely applied to the optical fiber communication industry due to the advantages of high density and high speed.

Wavelength division multiplexing is a technique in which a plurality of light waves are transmitted through the same optical fiber. At a transmitting end, a plurality of optical signals carrying different information streams and having different wavelengths are multiplexed together on the wavelengths and transmitted to the same optical fiber for transmission (wave combination); at the receiving end, the optical signals of the plurality of different wavelengths that are combined together are separated (demultiplexed). Accordingly, as shown in fig. 9, a wavelength division multiplexer commonly used on the market now includes an optical transmission mechanism 2 ' and an optical reception mechanism 2 ", the optical transmission mechanism 2 ' includes an optical fiber holder 20 ', a collimator 21 ', and an optical filter 22 ', and the optical reception mechanism 2" includes an optical fiber holder 20 ' and a collimator 21 '.

Because of the great use of wavelength division multiplexing devices, users are more and more expecting to further reduce the cost of wavelength division multiplexing devices, however, the obtained effect is not ideal, and for the reason, the existing wavelength division multiplexers mainly adopt the working principle that two sets of mechanisms (optical sending mechanism and optical receiving mechanism) are cooperated, that is, two sets of optical fiber holders and collimators are required to be used on one wavelength division multiplexer, which cannot fundamentally reduce the cost and is also not beneficial to reducing the volume of the wavelength division multiplexer.

SUMMERY OF THE UTILITY MODEL

The present invention aims to provide a wavelength division multiplexing device with greatly reduced cost and volume for solving the above technical problems.

In order to achieve the above object, the present invention discloses a wavelength division multiplexing device, comprising a main body, wherein a light processing mechanism is arranged in the main body, the light processing mechanism comprises an optical fiber holder, a collimator, an optical filter and an optical reflector;

the optical fiber fixer is used for connecting optical fibers and is provided with at least one optical fiber input end and at least two optical fiber output ends;

the collimator is arranged behind the optical fiber fixer and is used for collimating or focusing the optical signal output by the optical fiber input end;

the optical filter is arranged behind the collimator and is used for enabling optical signals with selected wavelengths to penetrate through;

the collimator can reversely project the optical signal which is not transmitted through the optical filter to one of the optical fiber output ends;

the optical reflector is arranged behind the optical filter and used for reflecting the optical signal output from the optical filter back to the optical fiber fixer and changing the optical path of the received optical signal to enable the optical signal to enter the other optical fiber output end.

Compared with the prior art, the utility model discloses light processing mechanism among the wavelength division multiplexing device is except being provided with light processing mechanism, light processing mechanism includes optical fiber fixer, collimator, optical filter, still is provided with the optical reflector at optical filter's output, and during operation, after the light signal reached optical filter, the part light signal that is selected to see through by the wave filter entered optical reflector, along with the change to the light path through the reflection of optical reflector, made it return to one of them optical fiber output along optical filter, collimator in proper order to this part light signal that optical filter selected, simultaneously, the light signal that can't see through optical filter returns to another optical fiber output along the collimator; therefore, the wavelength division multiplexing device can use one set of optical fiber fixer and collimator for transmitting and receiving optical signals through the arrangement of the reflector, thereby greatly reducing the product cost and reducing the product volume.

Preferably, the light reflector includes a light reflecting surface, an included angle α is formed between the light reflecting surface and the light emitting surface of the optical filter, and a reflection light path of the light reflecting surface is communicated with a corresponding one of the optical fiber output ends through the included angle α.

Preferably, alpha is more than 0 and less than or equal to 5 degrees.

Preferably, the light reflector and the light filter are connected through a wedge-shaped light-transmitting member.

Preferably, the collimator includes a convex lens or a graded index lens.

Preferably, the optical filter is a filter or a coating film arranged at the output end of the collimator and used for filtering.

Preferably, the main body is a hollow tubular structure, the optical processing mechanism is arranged in the lumen of the main body, the optical fiber holder is arranged at the port of the lumen of the main body, and the optical fiber holder is connected with the lumen of the main body in a sealing way.

Preferably, the main body is provided with two working ends, and the two working ends are respectively provided with one optical processing mechanism.

Preferably, the light reflector is shared between two of said light processing mechanisms.

Drawings

Fig. 1 is a schematic plan view of a wavelength division multiplexing device according to an embodiment of the present invention.

Fig. 2 is a schematic plan view of a wavelength division multiplexing device according to another embodiment of the present invention.

Fig. 3 is a schematic plan view of a wavelength division multiplexing device according to another embodiment of the present invention.

Fig. 4 is a schematic diagram of a connection structure between the optical filter and the optical reflector according to an embodiment of the present invention.

Fig. 5 is a schematic plan view of an optical fiber holder according to an embodiment of the present invention, on which three optical fibers are connected.

Fig. 6 is a schematic plan view of an optical fiber holder according to an embodiment of the present invention, on which four optical fibers are connected.

Fig. 7 is a schematic plan view of a wavelength division multiplexing device according to another embodiment of the present invention.

Fig. 8 is a schematic plan view of a wavelength division multiplexing device according to another embodiment of the present invention.

Fig. 9 is a schematic plan view of a prior art wavelength division multiplexing device.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

In order to reduce the cost of the product, the wavelength division multiplexing device of this embodiment is disclosed in this embodiment, and is used for multiplexing and demultiplexing in the wavelength division multiplexing technology, as shown in fig. 1, the wavelength division multiplexing device of this embodiment includes a main body 1, an optical processing mechanism 2 is disposed in the main body 1, and the optical processing mechanism 2 includes an optical fiber holder 20, a collimator 21, an optical filter 22, and an optical reflector 23. The fiber holder 20 is used for holding an optical fiber and is provided with at least one fiber input end 200 and at least two fiber output ends 201. The collimator 21 is disposed behind the optical fiber holder 20, and is configured to collimate the optical signal output by the optical fiber input end 200. The optical filter 22 is disposed behind the collimator 21 for transmitting the optical signal with the selected wavelength, and the collimator 21 can reversely project the optical signal which is not transmitted through the optical filter 22 to one of the optical fiber output ends 201. The optical reflector 23 is disposed behind the optical filter 22, and is configured to reflect the optical signal output from the optical filter 22 back to the optical fiber holder 20 and change the optical path of the received optical signal into another optical fiber output end 201'. In the present embodiment, the main body 1 and the optical processing mechanism 2 are made of glass, but other materials may be used.

In the above embodiment, the optical fiber holder 20, the collimator 21, the optical filter 22, and the optical reflector 23 are mounted on the main body 1 in this order to constitute an optical processing mechanism 2. The operation of the optical processing mechanism 2 will be described below with reference to a specific example. Referring to fig. 1 and 5, an optical fiber a is fixed at an optical fiber input end 200, an optical fiber B and an optical fiber C are respectively fixed at two optical fiber output ends 201, an original optical signal is input from the optical fiber a, reaches the optical filter 22 through the collimator 21, is reflected and projected by the optical filter 22, and is divided into a projected optical signal which can pass through the optical filter 22 and a reflected optical signal which cannot pass through the optical filter 22. The reflected light beam returns to the optical fiber B along the collimator 21 after changing the path through the reflection of the optical filter 22; the transmitted light signal that can pass through the optical filter 22 is projected onto the optical reflector 23, reflected by the reflector and changed in the return path, and finally returned to the optical fiber C, and, as shown in fig. 6, when four optical fiber output ends 201 are provided on the optical fiber holder, the projected light signal or the reflected light signal can also be output through another optical fiber D. Therefore, the optical signal is transmitted and received by the optical fiber holder 20 and the collimator 21, which are arranged in a common set, so that the product cost can be greatly reduced, and the product volume can be reduced.

As shown in fig. 4, the optical reflector 23 further includes a light reflecting surface 230, an included angle α is formed between the light reflecting surface 230 and the light emitting surface of the optical filter 22, and a reflection light path of the light reflecting surface is communicated with a corresponding one of the optical fiber output ends 201 through the included angle α. Preferably, alpha is more than 0 and less than or equal to 5 degrees.

To facilitate mounting and fixing the optical reflector 23 and the optical filter 22, the optical reflector 23 and the optical filter 22 are connected by a wedge-shaped light-transmitting member 24. The wedge-shaped light-transmitting member 24 may be a glass member or a structural member formed of a light-transmitting gel.

Further, as for the selection of the collimator 21, a convex lens (see fig. 1) may be used, and a graded index lens (see fig. 2) may be used.

In addition, for the optical filter 22, a filter sheet (see fig. 1) or a coating film for filtering (see fig. 3) provided at the output end of the collimator 21 may be optionally used.

Further, the main body 1 is of a hollow tubular structure, the optical processing mechanism 2 is arranged in the tube cavity 10 of the main body 1, the optical fiber fixer 20 is arranged at the port of the tube cavity 10 of the main body 1, and the optical fiber fixer 20 is hermetically connected with the tube cavity 10 of the main body 1, so that the phenomenon that water vapor or dust enters and the working quality or performance is affected is avoided.

In order to improve the working efficiency of the wavelength division multiplexing device, it is preferable that, as shown in fig. 7, two working ends 11 are provided on the main body 1, and an optical processing mechanism 2 is respectively installed at the two working ends. In this embodiment, the two optical processing mechanisms 2 are respectively located at both ends in the lumen 10 of the main body 1. In addition, as shown in fig. 8, in order to further reduce the product cost, the two optical processing mechanisms 2 in the present embodiment may share a light reflector 23. In this embodiment, the optical reflector 23 has a front reflective surface and a rear reflective surface, and each reflective surface corresponds to its corresponding optical filter 22. When in use, one path of optical signal can be respectively introduced from two ends of the main body 1 to enter the corresponding optical processing mechanism 2, and the working process of the two optical processing mechanisms 2 is detailed in the working principle of the optical processing mechanism 2 and is not described herein again. In addition, since the two optical processing mechanisms 2 on the main body 1 operate independently, the two optical signals entering the optical processing mechanisms 2 may be of the same wavelength or different wavelengths.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. A wavelength division multiplexing device comprising a main body in which a light processing mechanism including a fiber holder, a collimator, an optical filter, and an optical reflector is provided;

the optical fiber fixer is used for fixing optical fibers and is provided with at least one optical fiber input end and at least two optical fiber output ends;

the collimator is arranged behind the optical fiber fixer and is used for collimating the optical signal output by the optical fiber input end;

2. The WDM device according to claim 1, wherein the light reflector comprises a light reflecting surface, and the light reflecting surface and the light emitting surface of the optical filter form an angle α, such that the reflected light path of the light reflecting surface communicates with a corresponding one of the optical fiber output ends.

3. The wavelength division multiplexing device of claim 2 wherein 0 < α ≦ 5 °.

4. The wdm apparatus of claim 2, wherein the optical reflector is coupled to the optical filter by a wedge-shaped optically transparent member.

5. The wdm apparatus according to claim 1, wherein the collimator comprises a convex lens or a graded index lens.

6. The WDM device according to claim 1, wherein the optical filter is a filter or a coating film disposed at the output end of the collimator for filtering.

7. The wdm apparatus according to claim 1, wherein the main body has a hollow tubular structure, the optical processing mechanism is disposed in the lumen of the main body, the optical fiber holder is disposed at a port of the lumen of the main body, and the optical fiber holder is sealingly connected to the lumen of the main body.

8. The wdm apparatus according to claim 1, wherein said main body is provided with two working ends, and said optical processing mechanisms are respectively mounted to said two working ends.

9. The wdm apparatus of claim 8, wherein a middle of two of said optical processing mechanisms share a single said optical reflector.