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Photon crystal optical fiber

A technology of photonic crystal fiber and fiber, which is applied in the direction of light guide, optics, optical components, etc.

Inactive Publication Date: 2005-03-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, changing the size of the air holes and hole spacing can only make the dispersion-wavelength curve flatter in a narrow wavelength range.

Method used

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  • Photon crystal optical fiber
  • Photon crystal optical fiber
  • Photon crystal optical fiber

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0016] A preferred implementation example of the present invention is: see figure 1 , figure 2 and image 3 , the optical fiber core has a missing air hole (silica solid) to form a light guide area, and its periphery is surrounded by six smaller air holes 1 in the background silica glass 3 to form an inner cladding, and other larger air holes 2 are in the The periodic arrangement in the background silica glass 3 forms the outer cladding. Using a periodic arrangement recognized in the art, that is, as figure 1 As shown, every three adjacent air holes 1 or 2 form an equilateral triangle, and the distribution of the mode field is as follows figure 2 shown. Diameter of air holes in outer cladding d 2 is 1.035 microns, and the air hole spacing Λ is 2.3 microns, when the inner cladding air hole diameter d 1 When it is the same as the outer cladding, that is, 1.035 microns, in the wavelength range of 1.0 microns to 2.0 microns, the dispersion of the optical fiber changes in t...

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PUM

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Abstract

The invention relates to a photon crystal optical fiber, containing a fiber core and a coat, and its characteristic: the fiber core is a central solid region of optical-fiber background material; the coat is a region around the fiber core and has uniformly distributed air holes at the periphery, the air holes are periodically arranged in the optical-fiber background material, i.e. every three adjacent air holes compose a regular triangle; several circles of air holes in the coat, near to the fiber core, compose an inner coat in a band-shaped region arranged of regular hexagons in the optical-fiber background material, and the rest compose an outer coat in an annular region arranged periodically in the optical-fiber background material; the air holes in the inner coat are smaller than those in the outer coat. The optical fiber provided by the invention can realize relatively flat dispersivity in a very broad wavelength range. It is applied to make various optical devices and can act as a transmission optical fiber for use.

Description

Technical field: [0001] The invention relates to a photon crystal fiber, in particular to a photon crystal fiber with flat dispersion in a wide wavelength range. technical background: [0002] In the past ten years, photonic crystal fiber has attracted the attention of scientists all over the world because of its many excellent properties. Photonic crystal fiber, also known as holey fiber or microstructure fiber, is characterized by the fact that the refractive index of the cladding is periodically modulated by the wavelength order. This modulation is generally achieved by introducing axially elongated air holes into silica glass. The fiber core consists of a defect that breaks the periodicity of the refractive index modulation. Relative to the effective refractive index of the cladding, if the core is made of a low refractive index material (such as air), this fiber guides light through the band gap principle, which requires strict arrangement of the air holes in the cladd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 郭淑琴黄肇明方捻王陆唐
Owner SHANGHAI UNIV