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A kind of microstructure cladding single crystal optical fiber and its preparation method

A microstructure and cladding technology, applied in cladding optical fiber, multi-layer core/cladding optical fiber, optical waveguide light guide, etc., can solve the problems of uneven diffusion, poor product performance stability, poor controllability, etc., to achieve Fiber characteristics are easy to control and improve the filtering effect

Inactive Publication Date: 2011-12-28
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only applicable to lithium niobate (LiNbO 3 ) crystal growth of single crystal fiber is not suitable for other crystal materials, which limits the range of cladding applications
In addition, the controllability of this method is poor, the degree of diffusion is uneven, the depth of diffusion is not suitable for control, and the stability of product performance is poor.

Method used

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  • A kind of microstructure cladding single crystal optical fiber and its preparation method
  • A kind of microstructure cladding single crystal optical fiber and its preparation method
  • A kind of microstructure cladding single crystal optical fiber and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the core 1 is lithium niobate single crystal with a diameter of 10um, the low-refractive-index background material 2 is pure quartz material, and the high-refractive-index column 3 is a cylinder with a cross-sectional diameter of 8um. For germanium-doped quartz of 1.55, the high-refractive-index columns 3 are distributed in a regular hexagonal lattice, and the distance between two adjacent high-refractive-index columns 3 is 15um; the working wavelength of this microstructure-clad single crystal fiber is 1550nm.

[0034] Due to the existence of high refractive index columns 3 distributed in a regular hexagonal lattice, the equivalent refractive index of the cladding (referring to the part of the microstructure cladding single crystal fiber except the core) is between the refractive index of pure silica material and germanium-doped silica Between the refractive indices, the difference between the equivalent refractive index of the cladding and t...

Embodiment 2

[0044] Such as figure 2 As shown, the core 1 is a sapphire single crystal with a diameter of 100um, the high refractive index background material 4 is a pure quartz material, and the low refractive index column 5 is a cylinder (air column) with a cross-sectional diameter of 10um. Germanium-doped quartz with a ratio of 1.55, the low-refractive-index columns 5 are distributed in a regular hexagonal lattice, and the distance between two adjacent low-refractive-index columns 5 is 20um; the working wavelength of this microstructure-clad single crystal fiber is 4um.

[0045] Due to the existence of the low-refractive-index columns 5 distributed in periodic lattices, the refractive index of the pure silica background material 4 is reduced, and the effective refractive index of the cladding (referring to the part of the microstructure cladding single crystal optical fiber except the core) is between that of pure silica Between the refractive index of the material and the refractive i...

Embodiment 3

[0054] Such as image 3 As shown, the fiber core 1 is a silver bromide single crystal with a diameter of 300um, the high-refractive-index background material 4 is pure quartz material, and the low-refractive-index column 5 is a regular square prism with a bottom side length of 100um. Fluorine-doped quartz with a ratio of 1.4, the low refractive index columns 5 are distributed in a square lattice; the working wavelength of this microstructure cladding single crystal fiber is 10.6um.

[0055] Due to the existence of the low-refractive-index columns 5 distributed in periodic lattices, the refractive index of the pure silica background material 6 is reduced, and the effective refractive index of the cladding (referring to the part of the microstructure cladding single crystal optical fiber except the core) is between that of pure silica Between the refractive index of the material and the refractive index of fluorine-doped silica, the difference between the effective refractive in...

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Abstract

The invention discloses a microstructure cladding monocrystalline optical fiber and a preparation method, which belong to the field of special optical fibers. The microstructure cladding monocrystalline optical fiber is characterized by comprising a fiber core and a microstructure cladding, wherein the microstructure cladding is encircled around the fiber core. In the invention, the microstructure cladding monocrystalline fiber is prepared by adopting a tube bundle stacking step, a heating drawing step and the like. The microstructure cladding monocrystalline optical fiber disclosed by the invention has the beneficial effects that (1) the inhibiting ability of the monocrystalline optical fiber on the high-order mode of a light beam can be controlled through changing materials; (2) the application is wide, and the monocrystalline fiber core-cladding can be made of different materials; and (3) the manufacturing time is short, and the yield is high.

Description

technical field [0001] The invention belongs to the field of special optical fibers, in particular to a microstructure-clad single-crystal optical fiber and a preparation method thereof. Background technique [0002] At present, single crystal optical fiber is mainly grown by wire drawing of crystal material, which has the dual characteristics of crystal and fiber. Single crystal optical fiber has the characteristics of high strength and high temperature resistance, and can be used in a wide range of fields such as conduction, sensing, frequency doubling, and holographic data storage. However, due to the high refractive index of the crystal, it is difficult to make a single crystal fiber into a core-cladding structure, and the existing single crystal fiber is usually a cladding-free structure. The single crystal optical fiber with no cladding structure has a large transmission loss, its characteristics are easily affected by environmental changes, and the integrity of the o...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B6/036
Inventor 娄淑琴鹿文亮王立文陈卫国邹辉
Owner BEIJING JIAOTONG UNIV
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