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Method for manufacturing photonic crystal optical fiber coupler

A technology of photonic crystal fiber and manufacturing method, which is applied in the coupling of optical waveguides, etc., can solve the problems of inconvenient operation and unsatisfactory coupling ratio, and achieve the effects of small coupling length, stable performance, and suitable for miniaturization and integration

Inactive Publication Date: 2011-03-30
ZHEJIANG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This method will collapse the air holes in the cone area due to high temperature, and it is not easy to operate, and the coupling ratio is not ideal

Method used

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  • Method for manufacturing photonic crystal optical fiber coupler
  • Method for manufacturing photonic crystal optical fiber coupler
  • Method for manufacturing photonic crystal optical fiber coupler

Examples

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Embodiment Construction

[0022] Further illustrate the present invention below in conjunction with accompanying drawing and embodiment.

[0023] Take making a 2×2 coupler as an example.

[0024] A method for manufacturing a photonic crystal fiber coupler, comprising the following steps:

[0025] 1) Determine the number and position of defects introduced into the photonic crystal fiber according to the beam splitting ratio of the coupler 2×2, and determine the length and number of photonic crystal fiber silicon tubes required according to the size of the coupler; this example introduces defects in the photonic crystal fiber The number of silicon tubes is 2, and the position is symmetrical with respect to the central silicon tube. The length of the photonic crystal fiber silicon tube is 1.5mm×ratio before and after the taper, and the number of silicon tubes is stacked up to six layers.

[0026] 2) making a single-mode optical fiber preform (such as figure 1 shown), the length and diameter of the middl...

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Abstract

The invention discloses a method for manufacturing a photonic crystal optical fiber coupler, which comprises the following steps: determining the number and the positions of introduced photonic crystal optical fiber defects according to the coupling ratio of the coupler and determining the length and the number of required photonic crystal optical fiber silicon pipes according to the size of the coupler; manufacturing single-mode optical fiber prefabricated bars; stacking all the silicon pipes into a hexagonal prism, wherein the single-mode optical fiber prefabricated bars are used at the positions of the defects, the front silicon sections and the back silicon sections of the single-mode optical fiber prefabricated bars extend out of the hexagonal prism, and refractive rate matching glueis filled at a clearance of the single-mode optical fiber prefabricated bars and the adjacent silicon pipes; then, coating an optical fiber protective layer on an external surface; and adding a sleeve pipe outside the hexagonal prism and tapering. The invention has simple manufacturing process and easy realization; and establishes a foundation for realizing full photonic crystal optical fiber communication and sensing; and the couplers with different splitting ratios and coupling ratios can be manufactured according to the number of the introduced defects, and the manufactured photonic crystal optical fiber coupler has stable performance and is suitable for miniaturization and integration.

Description

technical field [0001] The invention relates to a manufacturing method of a photonic crystal fiber coupler. Background technique [0002] Photonic crystal fiber (PCF, photonic crystal fiber) is a new type of optical waveguide developed based on photonic crystal technology. It is composed of a single medium (usually fused silicon or polymer), and the cladding is composed of some air holes that are periodically arranged in the cross section and remain unchanged in the longitudinal direction. It is also called microstructured fiber or holey fiber. According to the light guiding mechanism The difference can be divided into: refractive index light guide type and band gap light guide type. At the same time, the structure of the photonic crystal fiber can be flexibly designed to achieve many unique properties. For example, the endless single-mode transmission characteristics, large mode field area, high nonlinearity, and the coupling transmission of light between multiple cores c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/255
Inventor 孙丽艳黄腾超舒晓武刘承
Owner ZHEJIANG UNIV
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