CN216595612U

CN216595612U - Small-size optical collimator

Info

Publication number: CN216595612U
Application number: CN202122229188.5U
Authority: CN
Inventors: 陈海生; 张伟东; 曹正辉
Original assignee: XDK COMMUNICATION EQUIPMENT (HUIZHOU) CO Ltd
Current assignee: XDK COMMUNICATION EQUIPMENT (HUIZHOU) CO Ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2022-05-24
Anticipated expiration: 2031-09-15

Abstract

The utility model provides a small-sized optical fiber collimator, which comprises a single fiber capillary tube component, a glass tube and a lens, wherein the single fiber capillary tube component comprises an optical fiber and a capillary tube penetrating into the optical fiber, the rear end of the single fiber capillary tube component penetrates into the glass tube from the front end of the glass tube, the rear end face of the glass tube is fixedly bonded with the front end face of the lens, and the rear end face of the glass tube and the front end face of the lens are inclined planes. The optical fiber collimator provided by the utility model has the advantages that the glass tube and the end face of the lens are bonded and fixed, the outer diameter of the glass tube is reduced, the whole volume of the optical fiber collimator is reduced, compared with the outer diameter of about 1.3mm of the common small-spot collimator, the outer diameter of the collimator is only about 1.0mm, the reduction is about 30%, and the optical fiber collimator is more suitable for the assembly and application of intensive optical communication devices and modules.

Description

Small-size optical collimator

Technical Field

The utility model relates to the technical field of collimators, in particular to a small-sized optical fiber collimator applied to the field of optical communication.

Background

The appearance of the optical fiber greatly improves the communication speed and quality, along with the rapid development of economy and technology, the optical fiber communication device gradually develops to densification and miniaturization, and the optical fiber collimator is taken as an important structural element and widely applied to a passive device, so that the structural size of the collimator also directly determines the whole size of the device.

As shown in fig. 1, the conventional collimator basically consists of: the optical fiber ferrule comprises an optical fiber ferrule 1, a glass sleeve 2 and a lens 3, wherein the optical fiber ferrule 1 is made by penetrating a bare optical fiber into a capillary tube for curing, grinding and coating, and the structure of the optical fiber ferrule is shown in figure 2.

It can be seen that the factors limiting the outer diameter of the collimator are mainly the outer diameter of the glass sleeve 2 and the diameter of the convex lens 3, and the outer diameter of a general small-spot collimator is about 1.3mm, which is difficult to be applied to the assembly of dense optical communication devices and modules due to the large size.

SUMMERY OF THE UTILITY MODEL

In order to reduce the size of the collimator and ensure the manufacturing feasibility, the utility model provides the optical fiber collimator which has a simple structure and a smaller volume.

The technical scheme adopted by the utility model for solving the problems is as follows: the utility model provides an optical fiber collimator which comprises a single-fiber capillary component, a glass tube and a lens, wherein the single-fiber capillary component comprises an optical fiber and a capillary tube penetrating into the optical fiber, the rear end of the single-fiber capillary component penetrates into the glass tube from the front end of the glass tube, the rear end face of the glass tube is fixedly bonded with the front end face of the lens, and the rear end face of the glass tube and the front end face of the lens are inclined planes.

Further, the diameter of a through hole for penetrating into the capillary in the optical fiber is matched with the outer diameter of the capillary; the outer diameter of the optical fiber in the single-fiber capillary component is matched with the inner diameter of the glass tube.

Further, the front end face of the glass tube is a straight plane.

Further, the outer diameter of the glass tube is smaller than or equal to the outer diameter of the lens.

Furthermore, the rear end face of the single fiber capillary component is an inclined plane and is parallel to the front end face of the lens.

Furthermore, a fixing glue is filled between the rear end face of the single-fiber capillary component and the front end face of the lens.

Further, the outer diameter of the lens is 0.9 ± 0.1 mm.

Further, the inclination angle of the rear end face of the glass tube and the front end face of the lens is 8 +/-1 deg.

The utility model has the beneficial effects that: the optical fiber collimator provided by the utility model has the advantages that the glass tube and the end face of the lens are bonded and fixed, the outer diameter of the glass tube is reduced, the whole volume of the optical fiber collimator is reduced, compared with the outer diameter of about 1.3mm of the common small-spot collimator, the outer diameter of the collimator is only about 1.0mm, the reduction is about 30%, and the optical fiber collimator is more suitable for the assembly application of intensive optical communication devices and modules.

Drawings

FIG. 1 is a cross-sectional view of a prior art fiber collimator;

FIG. 2 is an exploded view of a prior art fiber collimator;

FIG. 3 is a cross-sectional view of a fiber collimator of the present invention;

FIG. 4 is an exploded view of a fiber collimator of the present invention.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are for reference and illustrative purposes only and are not intended to limit the scope of the utility model.

As shown in fig. 3-4, the present embodiment provides an optical fiber collimator, which includes a single fiber capillary assembly 10, a glass tube 20 and a lens 30, wherein the single fiber capillary assembly 10 includes an optical fiber 11 and a capillary 12 penetrating into the optical fiber 11, a front end of the glass tube 20 is sleeved outside the optical fiber 11 from a rear end face of the optical fiber 11, a rear end face of the glass tube 20 is fixedly bonded to a front end face of the lens 30, and a rear end face of the glass tube 20 and a front end face of the lens 30 are inclined planes.

In the present embodiment, the diameter of the through hole for penetrating the capillary 12 in the optical fiber 11 matches the outer diameter of the capillary 12;the outer diameter of the optical fiber 11 in the single fiber capillary assembly 10 matches the inner diameter of the glass tube 20.

In this embodiment, a single fiber capillary assembly 10 is formed by assembling a miniaturized capillary 12 and a bare optical fiber 11, and the outer diameter thereof is small.

In this embodiment, the front end surface of the glass tube 20 is a straight plane.

In the present embodiment, the outer diameter of the glass tube 20 is smaller than or equal to the outer diameter of the lens 30.

In the present embodiment, the rear end surface of the single fiber capillary assembly 10 is a slanted plane and is parallel to the front end surface of the lens 30.

In the present embodiment, a fixing glue is filled between the rear end face of the single fiber capillary assembly 10 and the front end face of the lens 30.

The outer diameter of the lens 30 is 0.9 ± 0.1 mm. In the present embodiment, the outer diameter of the lens 30 is 1 mm.

The inclination angle between the rear end face of the glass tube 20 and the front end face of the lens 30 is 8 +/-1 degrees, and in the embodiment, the inclination angle is 8 degrees; the oblique contact surfaces of the glass tube 20 and the lens 30 are subjected to angle complementation treatment to ensure that the cylindrical surface angle of the finished product is in the coaxial direction.

The working process of the optical fiber collimator comprises the following steps: the method comprises the steps of penetrating a capillary tube 12 into a through hole of an optical fiber 11, enabling the diameter of the through hole of the optical fiber to be matched with the outer diameter of the capillary tube 12, enabling the miniaturized capillary tube 12 and bare optical fibers 11 to be assembled to form a single-fiber capillary tube assembly 10, fixing the rear end face of a glass tube 20 and the front end face of a lens 30 through glue, enabling a contact area to be annular, enabling the glue to be annularly distributed under the action of siphoning, enabling the surface of the single-fiber capillary tube assembly 10 to penetrate into the glass tube through polishing and film coating treatment, enabling a corresponding angle face of the single-fiber capillary tube assembly 10 to be parallel to the plane of the lens, and enabling the position between the capillary tube 12 and the glass tube 30 to be fixed through debugging and glue filling to form a collimator finished product. Because the existing conventional convex lens is adopted, the optical performance and the cost are controlled, and meanwhile, compared with the conventional collimator, the outer diameter size of the conventional convex lens is only the diameter of the lens 30, the whole volume is effectively reduced, and the conventional convex lens is more suitable for being applied to intensive optical devices.

In the above embodiments, the material of the above structural components such as the single fiber capillary and the glass tube may be glass, or ceramic or metal material may be used instead.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. A small-sized optical fiber collimator is characterized in that: the optical fiber lens comprises a single-fiber capillary component and a glass lens, wherein the single-fiber capillary component comprises an optical fiber and a capillary penetrating into the optical fiber, the rear end of the single-fiber capillary component penetrates into the glass tube from the front end of the glass tube, the rear end face of the glass tube is fixedly bonded with the front end face of the lens, and the rear end face of the glass tube and the front end face of the lens are inclined planes.

2. The fiber collimator of claim 1, wherein:

the diameter of a through hole for penetrating into the capillary in the optical fiber is matched with the outer diameter of the capillary;

the outer diameter of the optical fiber in the single-fiber capillary component is matched with the inner diameter of the glass tube.

3. The fiber collimator of claim 1, wherein:

the front end face of the glass tube is a straight plane.

4. The fiber collimator of claim 1, wherein:

the outer diameter of the glass tube is smaller than or equal to the outer diameter of the lens.

5. The fiber collimator of claim 1, wherein:

the rear end face of the single-fiber capillary component is an inclined plane and is parallel to the front end face of the lens.

6. The fiber collimator of claim 5, wherein:

and fixing glue is filled between the rear end face of the single-fiber capillary component and the front end face of the lens.

7. The fiber collimator of claim 1 or 4, wherein:

the outer diameter of the lens is 0.9 +/-0.1 mm.

8. The fiber collimator of claim 1 or 5, wherein:

the inclination angle of the rear end face of the glass tube and the front end face of the lens is 8 +/-1 degrees.