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A kind of fiber optic coupler and fiber coupling method

An optical fiber coupler and optical fiber coupling technology, applied in the coupling of optical waveguides, cladding fibers, multi-layer core/cladding fibers, etc., can solve the problems of fiber coupler processing accuracy, processing difficulty, cost and loss, etc. The effect of avoiding field leakage, small macrobend loss, and low splice loss

Active Publication Date: 2022-07-29
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problems of existing optical fiber couplers with insufficient processing accuracy, processing difficulty, cost and loss, etc.

Method used

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  • A kind of fiber optic coupler and fiber coupling method
  • A kind of fiber optic coupler and fiber coupling method
  • A kind of fiber optic coupler and fiber coupling method

Examples

Experimental program
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Embodiment 1

[0040] In order to solve the problem of large insertion loss when the existing single-core multi-clad fiber is used as the bridge fiber of the fiber coupler, the multi-core multi-clad fiber can be used as the bridge fiber. However, the outermost part of the common multi-core multi-clad fiber The diameter of the layer is close to that of the outermost layer of the single-mode fiber, so it cannot be directly coupled with multiple single-mode fibers. The embodiment of the present invention provides an optical fiber coupler, which uses a multi-core and multi-cladding optical fiber as a bridging optical fiber. The single-mode fiber realizes low-loss fusion splicing, and after being prepared by the micro-drawing taper method, it can realize low-loss fusion splicing with the multi-core fiber.

[0041] like figure 1As shown in the longitudinal cross-sectional view, the optical fiber coupler provided in this embodiment includes a multi-core multi-clad optical fiber 10 and a sleeve 20 ...

Embodiment 2

[0065] On the basis of the optical fiber coupler provided in Embodiment 1, this embodiment also provides a method for optical fiber coupling, which uses the optical fiber coupler provided in Embodiment 1 to couple a single-mode fiber and a multi-core fiber.

[0066] like Image 6 As shown, the specific steps of the optical fiber coupling method provided in this embodiment are as follows. After completing the following steps 101-103, the connection structure of the fiber coupler 1, the multi-core fiber 2 and the multiple single-mode fibers 3 is as follows: Figure 7 As shown, the inside of the dotted frame is the overall structure of the fiber optic coupler 1 .

[0067] Step 101: Obtain an optical fiber coupler 1 provided in Embodiment 1.

[0068] In the optical fiber coupling method provided in this embodiment, the optical fiber coupler 1 provided in the embodiment 1 is used to couple a single multi-core optical fiber 2 and multiple single-mode optical fibers 3 . The length...

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Abstract

The present invention relates to the technical field of optical fibers, and more particularly, to an optical fiber coupler and a method for optical fiber coupling. The optical fiber coupler comprises a multi-core multi-clad optical fiber and a sleeve; the first end of the multi-core multi-clad optical fiber is coupled with the sleeve; the multi-core multi-clad optical fiber comprises at least two cores, and the outer cladding of each core is From the inside to the outside, the layers include: inner cladding, depressed inner cladding, annular cladding, outer cladding, depressed outer cladding and mechanical cladding; the outer surface radius of the multi-core multi-cladding fiber is greater than the preset minimum radius, and any two cores The core spacing is greater than the preset minimum core spacing. The multi-core optical fiber coupler provided by the invention can realize low-loss fusion splicing with the multi-core optical fiber after the multi-core multi-cladding optical fiber is tapered; and can realize low-loss fusion splicing with the standard single-mode optical fiber, and has lower macrobending loss . In another aspect, the present invention also provides a method for fiber coupling using a fiber coupler.

Description

【Technical field】 [0001] The present invention relates to the technical field of optical fibers, and more particularly, to an optical fiber coupler and a method for optical fiber coupling. 【Background technique】 [0002] Since multi-core fibers can provide a new multiplexing dimension of space, which can greatly increase the capacity of communication systems, in order to meet the needs of future communication systems, the use of multi-core fibers in communication systems has received more and more attention. Multi-core optical fiber communication systems need to be compatible with existing single-mode optical fiber communication systems, and multi-core optical fibers and single-mode optical fibers are required to achieve low-loss connections. In order to connect single-mode fiber and multi-core fiber, fiber couplers are usually used as bridges. Therefore, fiber couplers and bridge fibers in fiber couplers have become one of the key technologies to promote the practical appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/25G02B6/255G02B6/26G02B6/036
CPCG02B6/25G02B6/2551G02B6/26G02B6/03688
Inventor 唐明杜灏泽刘祝艺晓张峰铭邵元慧
Owner HUAZHONG UNIV OF SCI & TECH
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