CN202583529U

CN202583529U - Coaxial light receiving assembly

Info

Publication number: CN202583529U
Application number: CN 201220232168
Authority: CN
Inventors: 李小兵; 曹龙贵
Original assignee: Shenzhen Neo Photonic Technology Co Ltd
Current assignee: Shenzhen Neo Photonic Technology Co Ltd
Priority date: 2012-05-23
Filing date: 2012-05-23
Publication date: 2012-12-05
Anticipated expiration: 2022-05-23

Abstract

The utility model provides a coaxial light receiving assembly. The coaxial light receiving assembly comprises a TO-CAN coaxial light receiver and a transparent coaxial adapter casing pipe which has a refractive index similar to a fiber material, wherein the TO-CAN coaxial light receiver comprises a photodiode chip and a pipe cap having a lens, the transparent coaxial adapter casing pipe comprises a front end face and a rear end face which are respectively in optical coupling with the photodiode chip and an end face of a light-emitting port of a tail fiber jumper wire, and the rear end face of the coaxial adapter casing pipe is in physical face contact with the end face of the light-emitting port of the tail fiber jumper wire. The transparent coaxial adapter casing pipe which has the refractive index similar to the fiber material employs injection mould one-piece forming, is simple in structure, is easy to carry out mass production and has low production cost and strong practicality, moreover, solid inclined end face design is employed for optical path design, so light return loss indexes of the whole light receiving assembly can meet performance requirements for long distance transmission.

Description

A kind of axis light receiving unit

Technical field

The utility model relates to a kind of optical fiber receive module, relates in particular to a kind of axis light receiving unit.

Background technology

Along with the development in optical fiber communication market, optical communication system has proposed long distance to optical communications module and assembly, high-performance, requirement cheaply.In order to satisfy long requirement apart from high-property transmission, must control optical module and assembly thereof has higher light return loss index.Existing axis light receiving unit adopts the encapsulation of metal light mouth usually; As shown in Figure 1; Comprise: a TO-CAN coaxial optical receiver 1, a metal adapter base 2, a metal adapter tail plug 3, an opening ceramic ring 4, a ceramic insertion core 5; Wherein adopt interference to be press-fitted between ceramic insertion core 5 leading portions and the adapter shoe 2 or epoxy glue bonding, ceramic insertion core 5 back segments and opening ceramic ring 4 are press-fitted, between adapter tail plug 3 and the adapter shoe 2 the employing interference be press-fitted or epoxy glue bonding.This axis light receiving unit, its structural member is more, and assembling is difficult, and the light mouth structure is complicated, and whole assembly cost is higher.

The utility model content

For overcoming above shortcoming, the utility model provides a kind of can satisfy long Distance Transmission requirement and axis light receiving unit simple in structure, that assembling is easy, cost is low.

For reaching above goal of the invention; The utility model provides a kind of axis light receiving unit; Comprise: a TO-CAN coaxial optical receiver and a transparent and refractive index are near the coaxial adapter sleeve pipe of optical fiber material; Said TO-CAN coaxial optical receiver comprises that a photodiode chip and has a lens pipe cap; Said coaxial adapter sleeve pipe comprises that a front and rear end carries out optically-coupled with the light-emitting window end face of a said photodiode chip and a tail optical fiber wire jumper respectively, and the rear end face of said coaxial adapter sleeve pipe contacts with the light-emitting window end face physical surface of tail optical fiber wire jumper.

The front end face of said coaxial adapter sleeve pipe is that an angled end-face is horizontal by the θ angle.

The angular range of said θ angle is 8～12 °.

The rear end face of said coaxial adapter sleeve pipe is a planar end surface.

Because the axis light receiving unit of said structure; Only comprise TO-CAN coaxial optical receiver and transparent and refractive index two elements of coaxial adapter sleeve pipe near the optical fiber material; This coaxial adapter sleeve pipe can adopt injection mould one-body molded; Simple in structure, be easy to batch process and with low cost, have very strong practicality.On light path design, adopt solid angled end-face design simultaneously, guaranteed that the light return loss index of overall optical receiving unit can satisfy the high return loss index request of long Distance Transmission.

Description of drawings

Fig. 1 representes the structural representation of the axis light receiving unit of prior art;

Fig. 2 representes the axis light receiving unit structural representation of the utility model;

Fig. 3 representes coaxial adapter sleeve structure synoptic diagram shown in Figure 2.

Embodiment

Describe the utility model most preferred embodiment in detail below in conjunction with accompanying drawing.

Axis light receiving unit as shown in Figure 2 comprises: the transparent and refractive index of a TO-CAN coaxial optical receiver 10 and is near the coaxial adapter sleeve pipe 20 of optical fiber material.TO-CAN coaxial optical receiver 10 comprises that a photodiode chip 11 and has the pipe cap of lens 12.Coaxial adapter sleeve pipe 20 as shown in Figure 3; In the present embodiment; Coaxial adapter sleeve pipe 20 adopts injection mould one-body molded; Comprise that a front and

rear end

21,22 carries out optically-coupled with the light-emitting window end face 31 of a photodiode chip 11 and a tail optical fiber wire jumper 30 respectively, and the rear end face 22 of coaxial adapter sleeve pipe 20 contacts no air dielectric with light-emitting window end face 31 both physical surfaces.The front end face 21 of coaxial adapter sleeve pipe 20 can for an angled end-face horizontal by the θ angle, its angular range is 8～12 °.The rear end face 22 of coaxial adapter sleeve pipe 20 is that the light-emitting window end face 31 of a planar end surface and tail optical fiber wire jumper 30 is suitable, and generally, the light-emitting window end face 31 of tail optical fiber wire jumper 30 also is a planar end surface.The front end face 21 employing θ angles of coaxial adapter sleeve pipe 20 are 8 °～12 ° angled end-face on light path design, can guarantee that the light return loss index of overall optical receiving unit can satisfy the performance requirement of long Distance Transmission.And the light-emitting window end face 31 of tail optical fiber wire jumper 30 contacts with rear end face 22 physics of coaxial adapter sleeve pipe 20; Transmit the light signal of coming in directly gets into coaxial adapter sleeve pipe 20 behind the light-emitting window end face 31 of tail optical fiber wire jumper 30 rear end face 22 from optical communication network; Converge to photodiode chip 11 by the pipe cap lens 12 through light receiving element 10 after front end face 21 refractions of coaxial adapter sleeve pipe 20 again, transfer light signal to electric signal output.

Claims

1. axis light receiving unit; It is characterized in that; Comprise: a TO-CAN coaxial optical receiver (10) and a transparent and refractive index are near the coaxial adapter sleeve pipe (20) of optical fiber material; Said TO-CAN coaxial optical receiver (10) comprises that a photodiode chip (11) and has lens (12) pipe cap; Said coaxial adapter sleeve pipe (20) comprises that a front and rear end (21,22) carries out optically-coupled with the light-emitting window end face (31) of a said photodiode chip (11) and a tail optical fiber wire jumper (30) respectively, and the rear end face (22) of said coaxial adapter sleeve pipe (20) contacts with both physical surfaces of light-emitting window end face (31) of tail optical fiber wire jumper (30).

2. axis light receiving unit according to claim 1 is characterized in that, the front end face (21) of said coaxial adapter sleeve pipe (20) is that an angled end-face is horizontal by the θ angle.

3. axis light receiving unit according to claim 2 is characterized in that, the angle of said θ angle is 8～12 °.

4. according to claim 1,2 or 3 described axis light receiving units, it is characterized in that the rear end face (22) of said coaxial adapter sleeve pipe (20) is a planar end surface.