WO2019095690A1

WO2019095690A1 - Optical fiber connector

Info

Publication number: WO2019095690A1
Application number: PCT/CN2018/092258
Authority: WO
Inventors: 李旭东; 杨智敏; 龙辰; 候丹; 肖湘杰
Original assignee: 深圳太辰光通信股份有限公司
Priority date: 2017-11-20
Filing date: 2018-06-21
Publication date: 2019-05-23
Also published as: CN207396797U

Abstract

An optical fiber connector, comprising: a first optical fiber (1); a second optical fiber (4) optically coupled to the first optical fiber (1); a first stub (2) having a first end face and configured to fix the first optical fiber (1), the first optical fiber (1) protruding from the first end face; and a second stub (3) having a second end face opposite to and in close contact with the first end face and configured to fix the second optical fiber (4), an end face of the second optical fiber (4) being recessed inwards by 2800-3800 nm with respect to the second end face. The recess design of the optical fibers of the optical fiber connector enables a contact optical fiber connector component and a non-contact optical fiber connector component to be connected adaptively.

Description

Optical fiber connector

Technical field

The utility model relates to a fiber optic connector.

Background technique

In conventional contact fiber optic connectors, the butted fibers protrude from the end faces of the respective ferrules. According to the IEC standard, the fiber protrudes in the range of 1000 nm to 3000 nm. A conventional non-contact fiber optic connector, such as the non-contact fiber optic connector disclosed in the patent document CN104220912A, has a fiber end face recessed into the ferrule end face of 0.1 micron to 2.8 micron. When the contact fiber optic connector component is mated with the non-contact fiber optic connector component, the fiber bulge size of the contact fiber optic connector component does not match the fiber recessed dimension of the non-contact fiber optic connector component, especially It is easy to damage the coating layer of the non-contact fiber optic connector, resulting in damage to the connector. Therefore, the traditional contact fiber optic connector components and the non-contact fiber optic connector components cannot be interconnected, and the use is not flexible and convenient, and there are large limitations in application.

Utility model content

The main object of the present invention is to overcome the deficiencies of the prior art and to provide a fiber optic connector that enables the contact fiber optic connector component to be mated with the non-contact fiber optic connector component.

In order to achieve the above object, the utility model adopts the following technical solutions:

An optical fiber connector comprising: at least one first optical fiber; at least one second optical fiber optically coupled to the first optical fiber; a first ferrule having a first end surface and fixing the first optical fiber a first optical fiber protruding on the first end surface; and a second ferrule having a second end surface opposite to the first end surface and in close contact, and the second ferrule fixing the second optical fiber The end surface of the second optical fiber is recessed inwardly from 2800 nm to 3800 nm with respect to the second end.

further:

The end surface of the second optical fiber is recessed inwardly from 3000 nm to 3800 nm with respect to the second end.

An anti-reflection anti-reflection film is disposed on an end surface of the first optical fiber and the second optical fiber.

An anti-reflection anti-reflection film is also disposed on the first end surface of the first ferrule and the second end surface of the second ferrule.

A guide pin is disposed on an end surface of the second ferrule, and a guide pin hole for inserting the guide pin is disposed on an end surface of the first ferrule.

A guide pin is disposed on an end surface of the first ferrule, and a guide pin hole for inserting the guide pin is disposed on an end surface of the second ferrule.

A plurality of the first optical fibers and the second optical fibers are included.

The end faces of the first optical fiber and the second optical fiber are not in contact.

The beneficial effects of the utility model are as follows:

According to the optical fiber connector provided by the present invention, the end surface of the second optical fiber is recessed inwardly from 2800 nm to 3800 nm with respect to the second end of the second ferrule, and the contact optical fiber connector component can be made in at least most cases (first insertion The core is adapted to be coupled to the non-contact fiber optic connector component (second ferrule), in particular to prevent the anti-reflection anti-reflection film from damaging the fiber end face when the fiber is butted.

DRAWINGS

1 is a schematic structural view of an embodiment of a fiber optic connector of the present invention;

2a and 2b are schematic views of the ferrule docking process in an embodiment of the optical fiber connector of the present invention (the optical signals in FIGS. 2a and 2b propagate in opposite directions);

3a and 3b are respectively electron micrographs of the fiber end face before the fiber connector is docked and the fiber end face after 50 times of docking according to an embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the invention and its application.

Referring to FIG. 1 , FIG. 2 a and FIG. 2 b , in one embodiment, a fiber optic connector includes: at least one first optical fiber 1 ; at least one second optical fiber 4 optically coupled to the first optical fiber 1 a first ferrule 2 having a first end surface and fixing the first optical fiber 1, the first optical fiber 1 protruding on the first end surface, having a protruding end 5; and a second ferrule 3, A second end face opposite to and in close contact with the first end face, and the second ferrule 3 fixes the second optical fiber 4, the end face of the second optical fiber 4 facing inward with respect to the second end The recess is 2800 nm to 3800 nm.

In a preferred embodiment, the end surface of the second optical fiber 4 is recessed inwardly from 3000 nm to 3800 nm with respect to the second end.

In a preferred embodiment, an anti-reflection anti-reflection film is disposed on an end surface of the first optical fiber 1 and the second optical fiber 4.

In a more preferred embodiment, the first end surface of the first ferrule 2 and the second end surface of the second ferrule 3 are also provided with an anti-reflection anti-reflection film.

Referring to FIG. 1 , FIG. 2 a and FIG. 2 b , in a preferred embodiment, a guide pin 6 is disposed on an end surface of the second ferrule 3 , and an end surface of the first ferrule 2 is disposed to be inserted into the end The pin guide hole 7 of the guide pin 6.

In another preferred embodiment, a guide pin is disposed on an end surface of the first ferrule 2, and a guide pin hole for inserting the guide pin is disposed on an end surface of the second ferrule 3.

In one embodiment, the fiber optic connector includes a plurality of the first fiber 1 and the second fiber 4, and the fiber connector is a multi-fiber connector.

In some embodiments, the end faces of the first optical fiber 1 and the second optical fiber 4 are not in contact, and the optical fiber connector is a non-contact optical fiber connector.

In addition, the end faces of the first optical fiber 1 and the second optical fiber 4 may also be just in contact, and the optical fiber connector is a contact optical fiber connector.

Craftsmanship

For the connector part of the fiber recessed ferrule, the following steps can be made:

1. Firstly grind the ferrule end face and the fiber end face with 16μm, 9μm, 3μm silicon carbide particles.

2. The fiber was subjected to end grinding using 0.5 μm of cerium oxide particles.

3. After the grinding is completed, the ferrule and the fiber end face are subjected to anti-reflection anti-reflection coating treatment.

Test Results

1. Optical properties:

1.1 Insertion loss IL:

Maximum (dB) 0.25dB

Average (dB) 0.12dB;

1.2. Return Loss RL:

Maximum (dB) 80.5dB

Average (dB) 74.7dB;

2. Mechanical properties:

Continuously inserted and removed fifty times, the fiber end face magnifies the 400X end face without collision traces.

3a and 3b are respectively an electron micrograph of the end face of the optical fiber before the butting of the optical fiber connector of the embodiment of the present invention and the end face of the optical fiber after 50 times of docking.

The above is a further detailed description of the present invention in combination with specific/preferred embodiments, and it is not intended that the specific embodiments of the invention are limited to the description. It is to be understood by those skilled in the art that the present invention may be substituted or modified without departing from the spirit and scope of the invention. It is considered to belong to the scope of protection of the present invention.

Claims

An optical fiber connector, comprising: at least one first optical fiber; at least one second optical fiber optically coupled to the first optical fiber; a first ferrule having a first end surface and fixing the first An optical fiber, the first optical fiber protruding on the first end surface; and a second ferrule having a second end surface opposite to and in close contact with the first end surface, and the second ferrule fixing station The second optical fiber has an end surface of the second optical fiber recessed inwardly from 2800 nm to 3800 nm with respect to the second end.
The optical fiber connector according to claim 1, wherein an end surface of said second optical fiber is recessed inwardly from 3000 nm to 3800 nm with respect to said second end.
The optical fiber connector according to claim 1 or 2, wherein an antireflection antireflection film is provided on an end surface of said first optical fiber and said second optical fiber.
The optical fiber connector according to claim 3, wherein an anti-reflection anti-reflection film is also disposed on the first end surface of the first ferrule and the second end surface of the second ferrule.
The optical fiber connector according to claim 1 or 2, wherein a guide pin is disposed on an end surface of the second ferrule, and a guide for inserting the guide pin is disposed on an end surface of the first ferrule Pinhole.
The optical fiber connector according to claim 1 or 2, wherein a guide pin is disposed on an end surface of the first ferrule, and a guide for inserting the guide pin is disposed on an end surface of the second ferrule Pinhole.
The fiber optic connector of claim 1 or 2, comprising a plurality of said first optical fibers and said second optical fibers.
The optical fiber connector according to claim 1 or 2, wherein the end faces of the first optical fiber and the second optical fiber are not in contact.