CN218585042U

CN218585042U - Wavelength division multiplexer for optical module receiving end

Info

Publication number: CN218585042U
Application number: CN202223103497.9U
Authority: CN
Inventors: 张炳尧
Original assignee: Optiworks Kunshan Co Ltd
Current assignee: Optiworks Kunshan Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-03-07
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses a wavelength division multiplexer for optical module receiving terminal, include: the laser cutting device comprises a box body, wherein the box body comprises a base and a box cover which are connected with each other, the base comprises a bottom plate and a first side plate, the bottom plate comprises a first end and a second end which are opposite, the first side plate is connected to the first end of the bottom plate, and a through hole for laser to pass through is formed in the bottom plate; the light inlet module comprises an optical fiber adapter arranged on the first side plate in a penetrating mode and a first lens arranged on the optical fiber adapter; the glass block is arranged on the bottom plate of the box body, and one side of the glass block, which is far away from the first side plate, is connected with a plurality of optical filters; the reflector is arranged on the bottom plate and is positioned above the through hole; and the second lenses are arranged on the bottom plate and positioned between the optical filter and the reflecting mirror. The scheme adopts a direct coupling mode, light can be guided without using optical fibers, the internal space of the optical module can be saved, and the size of the optical module is convenient to miniaturize.

Description

Wavelength division multiplexer for optical module receiving end

Technical Field

The utility model relates to an optical communication technical field, specific is a wavelength division multiplexer for optical module receiving terminal.

Background

The optical module is an optoelectronic device for performing photoelectric and electro-optical conversion, wherein a transmitting end of the optical module converts an electric signal into an optical signal, and a receiving end of the optical module converts the optical signal into the electric signal. With the rapid development of the communication field, in order to ensure that data can be transmitted at a long distance and at a high speed, an optical module is generally used in the field of the existing data transmission technology. The optical module generally multiplexes multiple optical signals with different wavelengths into a single-mode optical fiber for transmission, and specifically, the optical module multiplexes the multiple optical signals with different wavelengths and transmits the multiplexed optical signals to the optical receiving module through the single-mode optical fiber, and the optical receiving module demultiplexes the wavelengths to meet the transmission requirements of the optical signals with different wavelengths.

In order to meet the requirement of optical signal multiplexing in the optical module, a wavelength division multiplexer can be arranged in the optical module. At present, most of the wavelength division multiplexers on the market have an optical input end and/or an optical output end connected with other optical devices through optical fibers, and since a certain space is required for winding and storing the optical fibers, in other words, when the wavelength division multiplexers are installed in an optical module, a space for winding and storing the optical fibers needs to be designed in the optical module, the size of the optical module is limited, and the optical module is difficult to miniaturize.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the embodiment of the utility model provides a wavelength division multiplexer for optical module receiving terminal, it is used for solving above-mentioned problem.

The embodiment of the application discloses: a wavelength division multiplexer for an optical module receiving end, comprising:

the laser box comprises a box body and a cover, wherein the box body comprises a base and a box cover which are connected with each other, the base comprises a bottom plate and a first side plate, the bottom plate comprises a first end and a second end which are opposite, the first side plate is connected to the first end of the bottom plate, and the bottom plate is provided with a through hole for laser to pass through;

the light inlet module comprises an optical fiber adapter arranged on the first side plate in a penetrating mode and a first lens arranged on the optical fiber adapter;

the glass block is arranged on the bottom plate of the box body, and one side of the glass block, which is far away from the first side plate, is connected with a plurality of optical filters;

the reflector is arranged on the bottom plate and is positioned above the through hole;

and the second lenses are arranged on the bottom plate and positioned between the optical filter and the reflecting mirror.

In particular, the fiber optic adapter is an LC receptacle.

Specifically, one side of the glass block, which faces the first lens, comprises a first area and a second area which are connected, the first area is provided with an antireflection film, and the second area is provided with a high-reflection film.

Specifically, an antireflection film is arranged on one side, facing the optical filter, of the glass block.

Specifically, the light incident surface and the light emitting surface of the first lens are both provided with antireflection films.

Specifically, the cross section of the reflector is triangular.

The utility model discloses following beneficial effect has at least: in the wavelength division multiplexer for the receiving end of the optical module, the incident end of the wavelength division multiplexer can be directly connected with the optical fiber jumper wire of a single core through the optical fiber adapter, and the reflector at the emergent end is utilized to convert laser from the horizontal direction to the vertical direction and downwards enter the photodiode, so that the function of splitting or combining light is realized. The scheme of this embodiment, because of using the mode of direct coupling, need not to use optic fibre can lead to the photodiode on, can be so that the optical module is inside need not to reserve the space that supplies the optic fibre dish line, deposit, be favorable to saving the inside space of optical module, the miniaturization of the optical module size of being convenient for.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a wavelength division multiplexer used in an optical module receiving end in an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a wavelength division multiplexer for an optical module receiving end under a first viewing angle in an embodiment of the present invention;

fig. 3 is a schematic diagram of an internal structure of a wavelength division multiplexer for an optical module receiving end in a second view angle according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a through hole on a base according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a glass block in an embodiment of the present invention;

fig. 6 is a schematic diagram of the wavelength division multiplexer used in the receiving end of the optical module and connected to the photodiode in the embodiment of the present invention.

Reference numerals of the above figures: 11. a base; 111. a base plate; 1111. a through hole; 112. a first side plate; 12. a box cover; 21. a fiber optic adapter; 22. a first lens; 3. a glass block; 31. a first region; 32. a second region; 4. an optical filter; 5. a mirror; 6. a second lens; 7. a photodiode.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the wavelength division multiplexer for an optical module receiving end of the present embodiment mainly includes: the device comprises a box body, a light inlet module, a glass block 3, a reflector 5 and a plurality of second lenses 6. The box body comprises a base 11 and a box cover 12 which are connected with each other and enclose to form an accommodating cavity, the base 11 comprises a bottom plate 111 and a first side plate 112, the bottom plate 111 comprises a first end and a second end which are oppositely arranged, the first side plate 112 is connected to the first end of the bottom plate 111, and the bottom plate 111 is provided with a through hole 1111 for laser to pass through, and particularly, the through hole 1111 is substantially located near the second end of the bottom plate 111. The light inlet module comprises an optical fiber adapter 21 and a first lens 22 arranged on the optical fiber adapter 21, the optical fiber adapter 21 is connected to the first side plate 112 of the box body, at least part of the optical fiber adapter 21 is located outside the accommodating cavity of the box body to be connected with other optical devices, and at least part of the first lens 22 is located in the accommodating cavity of the box body. The glass block 3 is located in the containing cavity of the box body and is arranged on the bottom plate 111 of the box body, the side, away from the first side plate 112 (or away from the first lens 22), of the glass block 3 is bonded with the plurality of optical filters 4, and the plurality of optical filters 4 are respectively plated with the filter coatings with different wavelengths. The reflecting mirror 5 is disposed on the bottom plate 111 and located above the through hole 1111, the plurality of second lenses 6 are disposed on the bottom plate 111 and located between the plurality of optical filters 4 and the reflecting mirror 5, and the plurality of second lenses 6 and the plurality of optical filters 4 are disposed in a one-to-one correspondence manner.

In particular, the fiber optic adapter 21 in this embodiment may be an LC receptacle.

As shown in fig. 5, in the present embodiment, the side of the glass block 3 facing the first lens 22 includes a first region 31 and a second region 32 connected to each other. Specifically, the first region 31 is a region of the glass block 3 corresponding to the first lens 22, and the second region 32 is a region other than the first region 31. The first region 31 is provided with an antireflection film, and the second region 32 is provided with a high-reflection film. Furthermore, an antireflection film is arranged on one side of the glass block 3 facing the optical filter 4. Preferably, the light incident surface and the light emitting surface of the first lens 22 are both provided with an antireflection film. By adopting the scheme, the transmission of optical signals can be improved by the antireflection film. When the optical signal output by the first lens 22 is incident through the first region 31 of the glass block 3, the light with different wavelengths in the optical signal is separated through a series of transmission and reflection of the filter film and partial reflection of the high reflection film on the second region 32 of the glass block 3, so that the function of wavelength division can be realized.

As shown in fig. 6, the cross section of the reflector 5 of the present embodiment is triangular, and preferably, it is a right-angled triangle. In other words, the reflector 5 includes a first straight wall surface and a second straight wall surface that are vertically connected to each other, and an inclined wall surface that is connected to the first straight wall surface and the second straight wall surface, and when light output from the second lens 6 passes through the first straight wall surface, the light is reflected by the inclined wall surface, and the light passes through the second straight wall surface, and enters the photodiode 7 of the optical module through the through hole 1111 of the bottom plate 111. Preferably, the photodiode 7 can be sunk into the through hole 1111 from the side of the through hole 1111 facing away from the reflector 5.

The optical path of the wavelength division multiplexer for the receiving end of the optical module in the embodiment is as follows: incident light enters the glass block 3 from the optical fiber adapter 21 and enters the glass block 3 through the first lens 22, the incident light is reflected and refracted in the glass block 3, is divided into a plurality of light beams, then the light beams are emitted from the plurality of optical filters 4 and enter the air, the plurality of light beams in the air enter the reflector 5 through the corresponding second lenses 6, are reflected by the reflector 5, and finally enter the photodiode 7 through the through hole 1111 in the bottom plate 111.

In summary, in the wavelength division multiplexer for the optical module receiving end of the present embodiment, the incident end of the wavelength division multiplexer can be directly connected to the optical fiber jumper of the single core through the optical fiber adapter 21, and the reflector 5 at the emitting end is utilized to convert the laser from the horizontal direction to the vertical direction, and the laser enters the photodiode 7 downward, so as to implement the function of splitting or combining the light. The scheme of this embodiment, because of using the mode of direct coupling, need not to use optic fibre can lead to photodiode 7 on, can be so that the optical module is inside need not to reserve the space that supplies optic fibre dish line, deposit, be favorable to saving the inside space of optical module, the miniaturization of the optical module size of being convenient for.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A wavelength division multiplexer for an optical module receiving end, comprising:

2. The wavelength division multiplexer according to claim 1, wherein the fiber optic adapter is an LC receptacle.

3. The wavelength division multiplexer according to claim 1, wherein a side of the glass block facing the first lens comprises a first region and a second region connected with each other, the first region is provided with an antireflection film, and the second region is provided with a high reflection film.

4. The wavelength division multiplexer according to claim 1, wherein an antireflection film is disposed on a side of the glass block facing the optical filter.

5. The wavelength division multiplexer according to claim 1, wherein an antireflection film is disposed on both the light incident surface and the light emitting surface of the first lens.

6. The wavelength division multiplexer according to claim 1, wherein the cross-section of the reflector is triangular.