CN214375396U

CN214375396U - Wavelength division demultiplexing device for optical device

Info

Publication number: CN214375396U
Application number: CN202120536220.1U
Authority: CN
Inventors: 付胜; 严伟
Original assignee: Wuhan Yusheng Photoelectric Co ltd
Current assignee: Wuhan Yusheng Photoelectric Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-10-08
Anticipated expiration: 2031-03-15

Abstract

The utility model discloses a wavelength division demultiplexing device for optical devices, which comprises a component tube shell, wherein a collimator, a wavelength division demultiplexer, a lens and a reflecting prism are sequentially arranged from the left side to the right side in the component tube shell, the top surface of the component tube shell is an open surface, the collimator is arranged on the left inner wall of the component tube shell, and the collimator is coaxial with a light input port of the wavelength division demultiplexer; the output light of the light output port of the wavelength division demultiplexer passes through the lens and then is reflected out of the opening surface by the reflecting prism. The utility model has simple installation process, low production difficulty and high production efficiency; can play a certain waterproof dustproof role, improve the product reliability. The layout space on the PCBA board is saved.

Description

Wavelength division demultiplexing device for optical device

Technical Field

The utility model belongs to the technical field of optical communication, concretely relates to wavelength division demultiplexing device for optical device.

Background

In the field of optical communication, in order to meet the requirement of high speed of optical devices and save optical fiber resources, a plurality of groups of low-speed laser chips are generally packaged together at a transmitting end, and a plurality of groups of light beams are multiplexed into the same optical fiber for transmission through a wavelength division multiplexing component; at the light receiving end, the wavelength division demultiplexer is correspondingly used to decompose the multi-path coupled light beam transmitted by the optical fiber into single-wavelength light beams to be received by the corresponding optical detectors respectively. In order to meet the requirements of miniaturization, high reliability and low cost, a cob (chip On board) packaging manner is often adopted for the multi-path high-speed optical device, that is, a chip and an optical path element are directly attached to a PCB substrate, and then electrical connection is realized through a lead bonding manner.

For the optical receiving end, in order to implement the wavelength division demultiplexing function, the existing structure generally attaches a collimator, a wavelength division demultiplexer, a lens, a reflector, an optical detector and the like to a PCBA board, wherein the reflector is suspended and fixed by a bracket, so that the reflector can reflect and convert multiple light beams decomposed by the wavelength division demultiplexer to a photosensitive surface of the optical detector which is also arranged on the PCBA board. By adopting the mode to realize the wavelength division demultiplexing function, each optical path element needs to be separately positioned and pasted, the process is complicated, the coupling of the optical paths needs active coupling, and the production efficiency is low; for PCBA boards with different layouts, mounting positions and positioning standards of optical path elements are determined according to actual layout conditions, and production parameters of production equipment are adjusted and calibrated correspondingly, so that on one hand, the operation is complicated, and the production efficiency is influenced; on the other hand, different PCBAs adopt different production processes or parameters, also do not benefit to batch management and control, lack the uniformity.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned weak point that exists among the prior art, the utility model provides a wavelength division demultiplexing device for optical device promotes integrated level and general suitability, simplifies production process, promotes production efficiency to and reduce cost.

The above object of the utility model is realized through following technical scheme:

a wavelength division demultiplexer for optical device is composed of a package tube with collimator, wavelength division demultiplexer, lens and reflecting prism arranged in turn from left to right,

the top surface of the component tube shell is an open surface, the collimator penetrates through the inner wall of the left side of the component tube shell, and the collimator is coaxial with the light input port of the wavelength division demultiplexer; the output light of the light output port of the wavelength division demultiplexer passes through the lens and then is reflected out of the opening surface by the reflecting prism,

the open face of the component tube shell is buckled on the PCBA circuit board, the PCBA circuit board is provided with a light detector, and the light incident light detector is reflected by the reflecting prism.

The parts of the front and rear sides of the package corresponding to the reflecting prism are provided with step-like indentations as described above.

As mentioned above, the front side surface and the back side surface are parallel, and one of the step lifting edges of the step-shaped notch and the reflection light path of the reflection prism are positioned on the same vertical plane which is vertical to the front side surface and the back side surface.

The height matching cushion table corresponding to the collimator, the wavelength division demultiplexer, the lens and the reflecting prism is arranged on the inner wall of the bottom surface of the component tube shell.

The height-matching cushion table is integrally connected with the assembly cartridge as described above.

The utility model discloses following beneficial effect has for prior art:

1. the installation process is simple, the production difficulty is low, and the production efficiency is high;

2. the waterproof and dustproof functions can be achieved to a certain extent, and the reliability of the product is improved;

3. the collimator, the wavelength division demultiplexer, the lens and the reflecting prism are suspended relative to the PCBA, so that the layout space of the PCBA is not occupied, and the layout space on the PCBA can be saved;

4. the step-shaped notch is arranged, so that the clamping, positioning and mounting operation during the mounting of the lens and the reflecting prism are facilitated;

5. the reflection light path of the reflection prism can be used for indicating and positioning through the step lifting edge.

Drawings

FIG. 1 is a schematic diagram of a wavelength division demultiplexing assembly;

FIG. 2 is a schematic side view of the optical path of the present invention;

in the figure, 1-component tube shell; 2-a collimator; 3-a wavelength division demultiplexer; 4-a lens; 5-a reflective prism; 6-PCBA circuit board; 7-a light detector; 11-positioning the boss; 12-step-shaped notch; 13-step lifting edge; 14-open face; 15-bottom surface; 51-reflective slope.

Detailed Description

To facilitate understanding and practice of the invention by those of ordinary skill in the art, the following detailed description of the invention is provided in connection with the examples, and it is to be understood that the examples described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

Example 1

A wavelength division demultiplexing device for optical devices comprises a component tube shell 1, wherein a collimator 2, a wavelength division demultiplexer 3, a lens 4 and a reflecting prism 5 are sequentially arranged from the left side to the right side in the component tube shell 1,

the top surface of the component tube shell 1 is an open surface 14, the collimator 2 penetrates through the inner wall of the left side of the component tube shell 1, and the collimator 2 is coaxial with the light input port of the wavelength division demultiplexer 3; the output light of the optical output port of the wavelength division demultiplexer 3 passes through the lens 4 and then is reflected by the reflecting prism 5 to the open surface 14.

The open face 14 of the component package 1 is fastened on the PCBA circuit board 6, the PCBA circuit board 6 is provided with the light detector 7, and the light reflected by the reflecting prism 5 enters the light detector 7.

The package 1 is a metal cavity structure having a bottom surface 15 and an open surface 14 (top surface) opposite to the bottom surface 15. The open face 14 of the component package 1 is fastened on the PCBA circuit board 6, and the optical detector 7 is attached to the PCBA circuit board 6 in an area corresponding to the reflection optical path of the reflection prism 5.

The collimator is used for receiving the optical signals transmitted by the optical fiber and collimating the converged light transmitted by the optical fiber into parallel light so as to be conveniently coupled with the subsequent wavelength division demultiplexer 3;

a wavelength division demultiplexer 3 for dividing the multi-path coupled light beam passing through the collimator 2 into a plurality of single-wavelength light beams and outputting the light beams;

the lens 4 is used for respectively converging the decomposed collimated light beams so as to improve the light receiving efficiency;

the reflecting prism 5 has a reflecting inclined plane 51, and the reflecting inclined plane 51 is disposed at an angle of 45 ° with the outgoing light beam of the lens 4, and is used for folding the light beam transmitted through the lens 4 by 90 ° and then emitting the light beam from the open surface 14 to enter the light detector 7.

In this embodiment, the outputs of the wavelength division demultiplexer 3 are four paths, and the optical axes of the four lenses 4 are coaxial with the four optical output ports of the wavelength division demultiplexer 3, respectively.

The inner wall of the bottom surface of the component tube shell 1 is provided with a height matching table corresponding to the collimator 2, the wavelength division demultiplexer 3, the lens 4 and the reflecting prism 5, and the height matching table is integrally connected with the component tube shell 1. The collimator 2, the wavelength division demultiplexer 3, the lens 4, and the reflection prism 5 are disposed on the corresponding height matching stages. The height matching of the light paths of the collimator 2, the wavelength division demultiplexer 3, the lens 4 and the reflecting prism 5 is guaranteed, and the collimator 2, the wavelength division demultiplexer 3, the lens 4 and the reflecting prism 5 are arranged on the inner wall of the bottom surface 15 of the component tube shell 1 through corresponding height matching platforms.

The front and rear sides of the module case 1 are provided with stepped indentations 12 in the parts corresponding to the reflection prisms 5. On one hand, the step-shaped notch 12 is convenient for clamping, positioning and mounting operations when the lens 4 and the reflecting prism 5 are mounted; on the other hand, the optical fiber coupler can play a role of avoiding touching and damaging the optical detector 7 or other components on the PCBA 6 when the position of the wavelength division demultiplexer 3 is adjusted for coupling and aligning the wavelength division demultiplexer 3 and the optical detector 7.

The front side and the back side of the component tube shell 1 are parallel, one step lifting edge 13 of the step-shaped notch 12 and a reflection light path of the reflection prism 5 are positioned on the same vertical plane which is vertical to the front side and the back side; the step rising and falling edge 13 corresponds to the reflection light path of the reflection prism 5. On one hand, the reference can be used as the reference of the mounting position of the reflecting prism 5; on the other hand, it is also used for mounting position reference when the wavelength division demultiplexer 3 is coupled with the photodetector 7 in actual use.

The wavelength demultiplexer 3 adopts Z-BLOCK, i.e. wavelength division demultiplexing by the filter filtering principle. Compared with a demultiplexing device adopting AWG (arrayed waveguide grating), the demultiplexing device adopts Z-BLOCK to realize demultiplexing function, has the advantages of lower insertion loss and low temperature sensitivity, and reduces the cost.

The component tube shell 1, the collimator 2, the wavelength division demultiplexer 3, the lens 4 and the reflecting prism 5 are integrated integrally to form an integral wavelength division demultiplexing component.

On one hand, the optical path coupling can be carried out on each component by directly adopting a passive mode without adopting active coupling, the working procedure is simple, the production difficulty is low, and the production efficiency is high;

on the other hand, the production process is simplified, and the wavelength division demultiplexing component is directly reversed, coupled with the optical detector 7 and then attached to the PCBA circuit board 6 for fixing. The operation is simple, the working procedures are reduced, and the production efficiency is high.

In addition, because the wavelength division demultiplexing component is fixed on the PCBA circuit board 6 in an inverted manner, the component tube 1 covers the internal components and the optical detector 7 inside the component tube 1, and the collimator 2, the wavelength division demultiplexer 3, the lens 4 and the reflecting prism 5 are suspended relative to the PCBA circuit board 6, so that the layout space of the PCBA circuit board 6 is not occupied, and the layout space on the PCBA circuit board 6 can be saved. The waterproof and dustproof structure can also prevent water and dust, play an additional protection role on components and improves the reliability of products.

Moreover, when optical devices or optical modules with different PCBA circuit board 6 layouts are produced, the wavelength division demultiplexing component can be directly mounted, and only the reflecting prism 5 of the wavelength division demultiplexing component is required to correspond to the optical detector 7, so that the production process is simplified, the production efficiency is improved, and the universal adaptability is high.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A wavelength division demultiplexing device for optical devices comprises a component tube shell (1), and is characterized in that a collimator (2), a wavelength division demultiplexer (3), a lens (4) and a reflecting prism (5) are sequentially arranged from the left side to the right side in the component tube shell (1),

the top surface of the component tube shell (1) is an open surface (14), the collimator (2) penetrates through the inner wall of the left side of the component tube shell (1), and the collimator (2) is coaxial with the light input port of the wavelength division demultiplexer (3); the output light of the light output port of the wavelength division demultiplexer (3) passes through the lens (4) and then is reflected out of the open face (14) through the reflecting prism (5),

an open face (14) of the component tube shell (1) is buckled on the PCBA circuit board (6), a light detector (7) is arranged on the PCBA circuit board (6), and the light incident light detector (7) is reflected by the reflecting prism (5).

2. A wavelength division demultiplexing device for optical devices in accordance with claim 1, wherein the front and rear side surfaces of said package (1) are provided with step-like notches (12) at portions corresponding to the reflecting prisms (5).

3. A wavelength division demultiplexing device for optical devices according to claim 2, wherein said front and rear side surfaces are parallel, and one of the step-like notches (12) has a step-like rising and falling edge (13) which is located on the same vertical plane perpendicular to the front and rear side surfaces as the reflection optical path of the reflection prism (5).

4. The wavelength division demultiplexing device for optical devices according to claim 1, wherein the inner wall of the bottom surface of said package (1) is provided with height-matching pads corresponding to the positions of said collimator (2), said wavelength division demultiplexer (3), said lens (4) and said reflecting prism (5).

5. A wavelength division demultiplexing device for optical devices in accordance with claim 4, wherein said height-matching block is integrally connected to the package (1).