Open microstructured fiber for having composite fiber core and using shifted single-hole diversion

A microstructured optical fiber, an open technology, applied in the directions of cladding optical fiber, optical waveguide light guide, light guide, etc., which can solve the problem of poor optical field-substance overlap of polished total internal reflection microstructured fiber and poor optical fiber diversion characteristics. , complex processing, low yield and other problems, to achieve excellent real-time sensing performance, improve real-time effect, and simple production

Inactive Publication Date: 2013-01-16
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages of current WW open microstructure optical fiber, such as poor conduction characteristics, incompatibility with more mature microstructure optical fiber design methods and optical fiber side grinding processing technology, complex processing, low yield, and large nonlinear error. And polished total internal reflection microstructure optical fiber light field - the shortcomings of poor overlap of the measured substance and difficulty in controlling the polishing depth provide an open microstructure optical fiber with a simple structure and easy fabrication

Method used

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  • Open microstructured fiber for having composite fiber core and using shifted single-hole diversion
  • Open microstructured fiber for having composite fiber core and using shifted single-hole diversion
  • Open microstructured fiber for having composite fiber core and using shifted single-hole diversion

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Embodiment 1

[0025] In the preparation of a kind of composite fiber core partial single-hole diversion open microstructure optical fiber provided by the present invention, the stacking method or ultrasonic drilling method is used to generate the preform rod, and then the same process as ordinary microstructure optical fiber drawing can be used to complete one-time molding , the preparation material can choose quartz glass or polymer material, after molding, such as figure 1 As shown, where the black filled part represents the base material, while the white part is air. Its structure includes a core and a cladding. The cladding except the guide hole is consistent with the ordinary photonic crystal fiber. It is a periodic arrangement of air holes surrounding the core, and the aperture is on the order of wavelength. Every three air hole units form an equilateral triangle, and the overall bandgap structure is an equilateral hexagon. For the design of the air holes in the cladding, the equilat...

Embodiment 2

[0031] This embodiment provides another kind of composite fiber core with non-uniform size air holes in the fiber core region with single-hole guide open microstructure optical fiber. The base material of the fiber is quartz glass, and the two sides of the inverted triangle top edge An air hole is located 0.9 microns above the horizontal axis of the fiber, 1.3 microns away from the fiber's symmetry axis, and has a radius of 0.6 microns. The air hole at the apex of the inverted triangle is located 0.4 microns directly below the center point of the fiber, and its radius is 1.15 microns. The guide holes are the same as in Example 1. The air holes 2 in the cladding are uniformly arranged in the base material according to the equilateral triangle rule generally adopted by ordinary photonic crystal fibers known in the art, and the radius of each air hole is d=1 micron, and the hole distance=2.25 microns.

[0032] The distribution ratio of the detection light field in the measured s...

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Abstract

The invention provides an open microstructured fiber having a composite fiber core and using shifted single-hole diversion, and the open microstructured fiber provided by the invention comprises a fiber core and a cover layer, wherein the cover layer is compatible with the design of the band-gap cover layer of the traditional total internal reflection type microstructured fiber, and a composite structure and a diversion structure are respectively introduced into the fiber core and the cover layer. The open microstructured fiber provided by the invention is characterized in that an oval diversion hole passing through a band-gap structure at one side is arranged at one side of the axisymmetric line of the surrounded band-gap structure, and a synthetic fiber core consisting of three small round air holes distributed in the shape of an inverted triangle is arranged around the fiber core. The open microstructured fiber provided by the invention has the characteristics of simplicity for manufacturing, easiness for implementation and excellent real-time sensing effectiveness, and can be applied to the real-time sensing of gas-liquid two-phase fluid of fibers and related fields.

Description

technical field [0001] The invention relates to an open microstructure optical fiber structure for detection, in particular to an open microstructure optical fiber structure used in the field of real-time sensing of gas-liquid fluids, which can improve the overlap between the detection light field and the measured substance, is compatible with the lateral grinding process, and has better microstructure. A composite fiber core partial single-hole diversion open microstructure fiber with diversion performance, low nonlinear coefficient and large processing margin. Background technique [0002] With the rapid development of industry, medicine and other fields, microstructured optical fibers have been more and more widely used in the field of gas-liquid sensing. In traditional microstructured optical fibers, many air holes with sizes on the order of wavelength are regularly arranged and extended in the axial direction, forming a two-dimensional bandgap structure, thereby realiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/032G02B6/02
Inventor 杨义王冠军刘建胜韩芳崔剑肖经
Owner DONGHUA UNIV
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