CN212321915U

CN212321915U - Light receiving assembly

Info

Publication number: CN212321915U
Application number: CN202021196198.2U
Authority: CN
Inventors: 雷奖清; 黄嘉新
Original assignee: O Net Communications Shenzhen Ltd
Current assignee: O Net Technologies Shenzhen Group Co Ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-01-08
Anticipated expiration: 2030-06-24

Abstract

The utility model relates to an optical communication field, concretely relates to light receiving component. The optical receiving assembly comprises a shell, a photodiode module and an optical fiber ceramic ferrule, wherein the photodiode module and the optical fiber ceramic ferrule are both packaged and fixed on the shell to form an integrated packaging structure, and an external optical signal is transmitted to the photodiode module through the optical fiber ceramic ferrule. The utility model discloses a set up the shell, be fixed in the shell with the encapsulation of photodiode module and optic fibre pottery lock pin on, form integral type packaging structure, the encapsulation is convenient, reduces the input of laser welding equipment, reduces the processing cost, and reduces the part quantity of whole encapsulation.

Description

Light receiving assembly

Technical Field

The utility model relates to an optical communication field, concretely relates to light receiving component.

Background

The optical receiving component is one of the core devices of an optical module, and the main application of the optical receiving component is to convert an optical signal into an electrical signal. The light receiving component generally comprises a photodiode module and an adapter, wherein an external optical connector is connected with the adapter and transmits an optical signal to the photodiode module through the adapter; or the optical fiber connector consists of a photodiode, a collimating lens and an adapter, wherein an external optical connector is connected with the adapter, transmits an optical signal to the collimating lens through the adapter, and transmits the optical signal to the photodiode through the collimating lens.

The existing light receiving assembly is usually assembled by two-piece or three-piece method, and the packaging is realized by laser welding. The two-piece combination mode is that the photodiode module is arranged in a tube shell, the tube shell and the adapter are connected and packaged in a laser welding mode, the three-piece combination mode is that the photodiode and the collimator are respectively and correspondingly arranged in the tube shell, the photodiode and the collimator are coupled, then the two corresponding tube shells are welded, then the adapter and the tube shell of the collimator are welded, and the packaging of the light receiving assembly is completed.

The light receiving module adopting the packaging mode has many components, needs to be invested in laser welding equipment and has high processing cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a light receiving assembly, solve current light receiving assembly part many, problem that the processing cost is high.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a light receiving component, includes shell, photodiode module and optic fibre pottery lock pin all encapsulate fixedly to the shell on, form integral type packaging structure, and outside light signal transmits to the photodiode module through optic fibre pottery lock pin.

The utility model discloses a further preferred scheme is: the optical receiving assembly further comprises a coaxial positioning piece for positioning the optical fiber ceramic ferrule, the coaxial positioning piece is arranged in the shell, and the axis of the coaxial positioning piece corresponds to the axis of the optical fiber ceramic ferrule.

The utility model discloses a further preferred scheme is: the optical fiber ceramic ferrule is arranged in the hole position of the annular bulge, and one end part of the optical fiber ceramic ferrule protrudes out of the annular bulge.

The utility model discloses a further preferred scheme is: the coaxial positioning piece is sleeved on the optical fiber ceramic ferrule protruding out of the annular bulge.

The utility model discloses a further preferred scheme is: one end face of the annular bulge is abutted against the coaxial positioning piece so as to limit the coaxial positioning piece.

The utility model discloses a further preferred scheme is: the coaxial positioning part is a ceramic sleeve.

The utility model discloses a further preferred scheme is: the light receiving assembly further comprises a glue layer arranged between the photodiode module and the shell.

The utility model discloses a further preferred scheme is: the shell is provided with a cavity and an exhaust passage, the exhaust passage is communicated with the cavity, and the photodiode module is installed in the cavity.

The utility model discloses a further preferred scheme is: the light receiving assembly also includes a seal that mates with the vent channel.

The utility model discloses a further preferred scheme is: the light receiving assembly further comprises a positioning bracket for positioning the external optical connector.

The beneficial effects of the utility model reside in that, compare with prior art, through setting up the shell, be fixed in the shell with the encapsulation of photodiode module and optic fibre pottery lock pin on, form integral type packaging structure, the encapsulation is convenient, reduces the input of laser welding equipment, reduces the processing cost, and reduces the part quantity of whole encapsulation.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is an exploded schematic view of a light receiving module of the present invention;

fig. 2 is a schematic plan view of the light receiving module of the present invention;

fig. 3 is a schematic plan view of the housing of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

fig. 5-7 are schematic cross-sectional views of the housing corresponding to the assembly process of the present invention.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present invention provides a preferred embodiment of a light receiving module.

With reference to fig. 1, 2 and 7, the light receiving assembly includes a housing 10, a photodiode module 20 and an optical fiber ferrule 30, the photodiode module 20 and the optical fiber ferrule 30 are both packaged and fixed on the housing 10 to form an integrated package structure, an external optical signal is transmitted to the photodiode module 20 through the optical fiber ferrule 30, and the photodiode module 20 converts the optical signal into an electrical signal. By encapsulating and fixing the photodiode module 20 and the optical fiber ceramic ferrule 30 on the housing 10, the light receiving assembly of the integrated encapsulation structure is formed, the encapsulation is convenient, the investment of laser welding equipment is reduced, the processing cost is reduced, and the number of integrally encapsulated components is reduced.

Further, referring to fig. 3 to 5, an annular protrusion 11 is disposed in the housing 10 along a circumferential direction thereof, the fiber ferrule 30 is disposed in a hole of the annular protrusion 11, and one end portion thereof protrudes from the annular protrusion 11. When assembling, an operator installs the optical fiber ferrule 30 in the hole of the annular protrusion 11, the specific position is determined by coupling the optical signal transmitted by the optical fiber ferrule 30 to the photodiode module 20, and the optical fiber ferrule 30 can be installed at a proper position in the hole of the annular protrusion 11 by setting a limit block and a sensor in the assembling tool.

Referring to fig. 6, in the present embodiment, the light receiving assembly further includes a coaxial positioning member 40 for positioning the fiber ferrule 30, wherein the coaxial positioning member 40 is disposed in the housing 10 and has an axis corresponding to an axis of the fiber ferrule 30. The coaxial positioning member 40 has a supporting and positioning function for the optical fiber ferrule 30, and can ensure the coaxiality of the optical fiber ferrule 30 and an external optical connector, thereby improving the optical coupling efficiency.

Specifically, the coaxial positioning element 40 is sleeved on the fiber ferrule 30 disposed on the protruding annular protrusion 11 to position the fiber ferrule 30, and ensure the coaxiality of the fiber ferrule 30 and the external optical connector, thereby improving the optical coupling efficiency. Further, one end face of the annular protrusion 11 abuts against the coaxial positioning element 40 to limit the coaxial positioning element 40. The coaxial positioning member 40 is installed in the housing 10 by an operator, and the coaxial positioning member 40 is sleeved on the portion of the fiber ferrule 30 protruding from the annular protrusion 11 and abuts against an end face of the annular protrusion 11, which indicates that the coaxial positioning member 40 is assembled in place. Of course, in other embodiments, a plurality of limiting blocks may be provided in the housing 10, or another annular protrusion 11 may be provided to limit the coaxial positioning member 40.

The coaxial positioning member 40 in this embodiment is a ceramic sleeve. The ceramic sleeve is a common component, does not need customization and has low cost. In other embodiments, the coaxial positioning member 40 may be made of other materials or shapes, and the axis of the coaxial positioning member corresponds to the axis of the fiber ferrule 30 to position the fiber ferrule 30.

In this embodiment, referring to fig. 4 and 7, the housing 10 is provided with a cavity 12 and an exhaust channel (not shown), the exhaust channel is communicated with the cavity 12, and the photodiode module 20 is installed in the cavity 12. The exhaust passage may be disposed at any position of the housing 10, as long as the cavity 12 is communicated with the outside to exhaust the gas in the cavity 12. Further, the light receiving assembly further includes a seal that mates with the air vent channel. Referring to fig. 1 and 2, after the photodiode module 20 is mounted in the housing 10, the photodiode module 20 may be encapsulated and fixed in the housing 10 by using glue, and after the glue is cured, a glue layer 50 is formed between the photodiode module 20 and the housing 10. In the process of installing the photodiode module 20 into the housing 10, the gas in the cavity 12 is squeezed and exhausted through the exhaust passage, so that bubbles are prevented from being generated between the photodiode module 20 and the housing 10, and after the photodiode module 20 is installed in place, the cavity 12 can be sealed through the matching of the sealing element and the exhaust passage. The sealing member may be formed by curing glue or by other means which may cooperate with the exhaust passage.

Referring to fig. 1, 6 and 7, in the present embodiment, the light receiving assembly further includes a positioning bracket 60 for positioning the external optical connector. Specifically, the positioning bracket 60 is disposed at the optical input port of the housing 10, and an operator can mount the optical connector on the positioning bracket 60 in a butt joint manner, so that the optical signal of the optical connector is transmitted to the optical fiber ferrule 30. In addition, the axis of the positioning bracket 60 corresponds to the axis of the coaxial positioning element 40, so as to ensure the coaxiality of the optical connector optical signal and the optical fiber ferrule 30.

Further, referring to fig. 4, a limiting portion 13 for limiting the position of the positioning bracket 60 is disposed in the housing 10. Specifically, the stopper portion 13 is provided at the light input port of the housing 10.

With reference to fig. 5 to 7, a specific assembly process of the light receiving module in the present embodiment is as follows:

the optical fiber ceramic ferrule 30 is press-fitted into the hole site of the annular protrusion 11 and is placed at a suitable position with one end portion thereof protruding out of the annular protrusion 11; the ceramic sleeve is arranged in the shell 10 and sleeved on the part of the optical fiber ceramic ferrule 30 protruding out of the annular bulge 11 and abutted against one end face of the annular bulge 11; the photodiode module 20 is installed in the cavity 12 of the housing 10, coupled with the optical signal transmitted by the optical fiber ferrule 30, and the photodiode module 20 is fixed in the housing 10 by glue, so as to complete the assembly of the optical receiving assembly.

The utility model discloses a light receiving assembly adopts shell 10 encapsulation photodiode module 20 and optic fibre pottery lock pin 30, encapsulates with gluing, reduces laser welding equipment's input, reduces the processing cost.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations should fall within the scope of the appended claims.

Claims

1. The utility model provides a light receiving component which characterized in that, includes shell, photodiode module and optic fibre pottery lock pin all encapsulate fixedly to the shell, form integral type packaging structure, and outside light signal transmits to the photodiode module through optic fibre pottery lock pin.

2. The optical receiver assembly of claim 1, further comprising a coaxial positioning member for positioning the fiber ferrule, the coaxial positioning member being disposed within the housing and having an axis corresponding to an axis of the fiber ferrule.

3. The light receiving module as claimed in claim 2, wherein the housing is provided with an annular protrusion along a circumferential direction thereof, the optical fiber ferrule is disposed in a hole of the annular protrusion, and one end portion of the optical fiber ferrule protrudes from the annular protrusion.

4. The optical receiving module as claimed in claim 3, wherein the coaxial positioning member is disposed on the optical fiber ferrule disposed on the protruding annular protrusion.

5. The light receiving module of claim 3, wherein an end surface of the annular protrusion abuts against the coaxial positioning member to limit the coaxial positioning member.

6. A light receiving module according to any one of claims 2-5, wherein said coaxial positioning member is a ceramic sleeve.

7. The light-receiving module of claim 1, further comprising a glue layer disposed between the photodiode module and the housing.

8. The light-receiving module as claimed in claim 1, wherein the housing is provided with a cavity and an exhaust passage, the exhaust passage is communicated with the cavity, and the photodiode module is mounted in the cavity.

9. The light receiving assembly of claim 8, further comprising a seal that mates with the vent channel.

10. The light receiving module of claim 1, further comprising a positioning bracket for positioning an external optical connector.