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Method for splicing photonic crystal fiber and single-mode fiber

A technology of photonic crystal fiber and single-mode fiber, which is applied in the coupling of optical waveguide, optics, light guide, etc., can solve the problems of uneven filling and low filling efficiency, improve the filling and welding efficiency, increase the mode field diameter, and apply wide-ranging effect

Active Publication Date: 2016-10-12
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a fusion splicing method between a photonic crystal fiber and a single-mode fiber. Filling, thus solving the technical problems of low filling efficiency and uneven filling in the prior art

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  • Method for splicing photonic crystal fiber and single-mode fiber
  • Method for splicing photonic crystal fiber and single-mode fiber
  • Method for splicing photonic crystal fiber and single-mode fiber

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Embodiment 1

[0037] S1. The structure of the photonic crystal fiber 3 used in this embodiment is as follows figure 1 As shown, its parameters are fiber core diameter 2.43μm, air hole diameter 3.44μm, air hole spacing 3.93μm, air filling ratio 0.86;

[0038] Pretreatment is performed on the end of the photonic crystal fiber 3: sequentially including removing the fiber coating layer, cleaning with absolute ethanol, and cutting the end face.

[0039] Then selectively fill the photonic crystal fiber: Here, UV-curable glue is used as the filling of the air hole in the photonic crystal fiber. see figure 2 As shown, the ultraviolet light source 1 with a wavelength of 365nm band couples the ultraviolet light into the photonic crystal fiber 3 through two convex lenses with a focal length of 8mm in the spatial light coupling system 2, and the output optical power of the fiber is about 50nW, and then connects one end of the photonic crystal fiber 1-2 mm is immersed in the ultraviolet curing glue 4...

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Abstract

The invention discloses a method for splicing a photonic crystal fiber and a single-mode fiber. The method includes the steps that light curing adhesives permeate into the first end of the photonic crystal fiber, ultraviolet light is coupled into a fiber core of the photonic crystal fiber from the second end of the photonic crystal fiber, and the light curing adhesives at the portion, around the fiber core, in the first end of the photonic crystal fiber are cured to fill air holes of the photonic crystal fiber; the uncured light curing adhesives in the first end are removed, and the second end of the photonic crystal fiber is sealed; air pressure is applied to the first end of the photonic crystal fiber to allow the air pressure of air holes which are not filled to be higher than barometric pressure, the first end of the photonic crystal fiber is subjected to discharging heating to be at 1,400 DEG C to 1,900 DEG C, and the air holes which are not filled in the first end are collapsed and sealed; the first end of the photonic crystal fiber and the single-mode fiber are spliced. According to the method, the air holes in the photonic crystal fiber are subjected to selective area filling through the light curing materials in cooperation with the ultraviolet light, and therefore the technical problems that in the prior art, filling efficiency is low, and filling is uneven are solved.

Description

technical field [0001] The invention belongs to the technical field of photonic crystal fiber selective filling and beam expansion fusion, and more specifically relates to a fusion splicing method of a photonic crystal fiber and a single-mode fiber. Background technique [0002] Because of its characteristics of infinite single mode, controllable dispersion and high nonlinearity, photonic crystal fiber (PCF) is mainly used in supercontinuum generation and dispersion management in lasers. Although photonic crystal fiber has many advantages compared with ordinary optical fiber, it must be connected with traditional optical system easily and with low loss if it is to be widely used. However, the air hole structure of the photonic crystal fiber cladding causes the pollution of the air holes during the use of the fiber and the collapse of the air holes during the fusion process, which directly leads to an increase in loss or even unusability. Therefore, before the fusion of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/255
CPCG02B6/2555
Inventor 李进延徐中巍李海清彭景刚杨旅云戴能利罗兴沈翔
Owner HUAZHONG UNIV OF SCI & TECH
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