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Multi-core optical fiber coupler and preparation method thereof

A multi-core fiber and coupler technology, which is applied in the coupling of optical waveguides, instruments, light guides, etc., can solve the problem that the cost and performance of multi-core fiber couplers are difficult to achieve, and achieves low processing difficulty, convenient fusion and high precision. Effect

Active Publication Date: 2019-01-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method of the multi-core optical fiber coupler based on the low-melting point sleeve provided by the present invention has the characteristics of good scalability, simple preparation, high precision and high yield, thereby solving the problem of preparing various multi-core optical fiber couplers in the prior art Affected by various aspects such as processing accuracy, processing difficulty, cost and loss, etc., the technical problem that the cost and performance of multi-core optical fiber couplers are difficult to achieve

Method used

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  • Multi-core optical fiber coupler and preparation method thereof
  • Multi-core optical fiber coupler and preparation method thereof
  • Multi-core optical fiber coupler and preparation method thereof

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preparation example Construction

[0040] The preparation method of the multi-core optical fiber coupler provided by the invention comprises the following steps:

[0041] (1) After stripping off part of the coating layer on the surface of N single-mode optical fibers, N first intermediate pieces are obtained; the first intermediate piece is divided into two parts, one part is an optical fiber comprising only a core layer and a cladding layer, and the other part It is a complete optical fiber including core, cladding and coating. Preferably, the coating layer of N single-mode optical fibers is stripped, and then the first intermediate piece is obtained after dedusting with a dust-free paper dipped in alcohol; the first intermediate piece is divided into two parts, and the front part is composed of a core layer and a cladding Layered optical fiber, the length is 4 to 6 cm, the rear end part is a complete optical fiber including the core layer, cladding and coating layer, the length is 1.5 to 3 meters, and N is an...

Embodiment 2

[0063] Embodiment 2 provides a kind of preferred preparation method of the multi-core optical fiber coupler based on the low-melting point sleeve, the circular sleeve adopted in step (2), one end of which can be made into a bell mouth to facilitate the insertion of the optical fiber without damaging the single-mode Optical fiber coating.

Embodiment 3

[0064] Embodiment 3 provides a kind of preferred preparation method of the multi-core fiber coupler based on the low-melting point sleeve, the circular sleeve adopted in step (2), is the same cylinder as the geometric distribution of the multi-core optical fiber core casing.

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Abstract

The invention belongs to the technical field of optical fiber communication and sensing, and particularly relates to a multi-core optical fiber coupler and a preparation method thereof. The preparation method comprises the steps of inserting a plurality of single-mode optical fibers of which a coating layer on each front end is removed and a coating layer on each rear end is still kept into a circular sleeve subject to a first time of tapering; then, performing a second time of tapering at a same position so that the single-mode optical fibers are fixed by the circular sleeve; next, performinga third time of tapering on a tapered area subject to the second time of tapering so that a tapered waist portion and a multi-core optical fiber cladding are consistent in diameter, and cutting the tapered waist portion; and at last, directly welding with a multi-core optical fiber by fusion, thereby completing the preparation of the multi-core coupler. The preparation method of the multi-core optical fiber coupler based on a low melting point sleeve provided by the invention has the characteristics of good expandability, simple preparation, high precision and high finished product ratio.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication and sensing, and more specifically relates to a multi-core optical fiber coupler and a preparation method thereof. Background technique [0002] In order to meet the needs of future communication systems, multi-core optical fiber has been paid more and more attention because it can provide a new multiplexing dimension of space, which can greatly increase the capacity of communication systems. The multi-core optical fiber communication system needs to be compatible with the existing single-mode optical fiber communication system, which requires multi-core optical fiber and single-mode optical fiber to achieve low-loss connection. One of the key technologies of cost. [0003] At present, there are several ways to make multi-core fiber couplers: [0004] Tapered self-assembly method (patent application number: 201610328915.4): Insert the corroded single-mode optical fiber into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/245G02B6/25G02B6/255
CPCG02B6/245G02B6/25G02B6/2551
Inventor 唐明李兵甘霖霍亮沈力
Owner HUAZHONG UNIV OF SCI & TECH
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