Method for splicing photonic crystal fiber and single-mode fiber

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...

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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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