Germanate glass optical fiber with emission wavelength of 1.5-2.2 mu m

A technology of germanate glass and emission wavelength, which is applied in the direction of cladding optical fiber, optical waveguide light guide, optics, etc., can solve the problems of low fiber laser quantum efficiency and slope efficiency, low laser damage threshold, low quantum efficiency, etc., and achieve good Chemical stability and environmental adaptability, strong chemical stability and environmental adaptability, high fluorescent quantum efficiency

Inactive Publication Date: 2009-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher phonon energy of quartz glass (~1100cm -1 ), low rare earth ion doping ability (-1 ), but the low laser damage threshold and relatively poor chemical stability of tellurite glass limit its application; the phonon energy of fluoride glass is low (~500cm -1 ), the quantum efficiency of the laser is high, but the chemical stability of fluoride glass and the disadvantages of poor glass drawing performance limit its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A germanate glass single-clad optical fiber with an emission wavelength of 1.5-2.2 μm, the composition of the core glass is: 20mol% BaO-5mol% Ga 2 O 3 -70mol% GeO 2 -5mol% Y 2 O 3 , plus 4.0 mol% Tm 2 O 3 ; The cladding glass is germanate glass with the same composition as the core glass, but not doped with rare earth ions; the optical fiber preform with a circular cross-section is obtained by the tube rod method; the outer diameter is 200 μm drawn on the drawing tower , A germanate glass fiber with a core diameter of 30 μm can obtain luminescence of 1.5-2.2 μm under the excitation of 808 nm LD.

Embodiment 2

[0028] A germanate glass single-clad optical fiber with an emission wavelength of 1.5-2.2 μm, the composition of the core glass is: 30 mol% Ga 2 O 3 -25mol%PbO-40mol%GeO 2 -5mol% La 2 O 3 , plus 0.2 mol% Ho2 O 3 ; The outer layer is made of silicate optical glass whose refractive index, glass transition temperature, and crystallization start temperature match the core glass, and the optical fiber preform is obtained by the tube rod method; the outer diameter is 125 μm and the core diameter is drawn on the drawing tower. It is a standard germanate glass fiber of 7 μm, and can obtain luminescence of 1.5-2.2 μm under the excitation of a 2.0 μm thulium-doped laser or a 1535 nm erbium-doped laser.

Embodiment 3

[0030] A germanate glass double-clad optical fiber with an emission wavelength of 1.5-2.2 μm, the composition of the core glass is: 15mol% BaO-10mol% Ga 2 O 3 -70mol% GeO 2 -5mol% Ln 2 O 3 , plus 1 mol% Ho 2 O 3 and 1mol% Yb 2 O 3 ; The lanthanum crown glass with matching refractive index and glass transition temperature is used as the inner cladding material of the optical fiber, and the optical fiber preform with a square cross-section of the inner cladding is prepared by the tube-rod method; the plastic with matching refractive index is used as the outer cladding, in the drawing tower A germanate double-clad glass fiber with an outer diameter of 200 μm and a core diameter of 30 μm is pulled up, and the luminescence of 1.5-2.2 μm can be obtained under the excitation of 980 nm LD.

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Abstract

The invention provides a germanate glass optical fiber the emission wavelength of which is 1.5-2.2mum. The germanate glass optical fiber comprises a fiber core and a cladding, the material of the fiber core is germanate glass, the fiber core glass is doped with rare earth ions, and the doped rare earth ions comprises single-doped Tm<3+>, or single-doped Ho<3+>, or co-doped Tm<3+> / Ho<3+>, or co-doped Tm<3+> / Yb<3+>, or co-doped Ho<3+> / Yb<3+>, or triple-doped Tm<3+> / Ho<3+> / Yb<3+>. The optical fiber is single-cladding optical fiber, double-cladding optical fiber or a photonic crystal fiber. The optical fiber has the advantages of higher rare earth ions doping concentration, better mechanical property, better chemical stability and higher gain. The optical fiber emits 1.5-2.2mum light under the excitation of pumping light with a certain wavelength and can be used for manufacturing 1.5-2.2mum fiber lasers or 1.5-2.2mum optical fiber amplifiers.

Description

technical field [0001] The invention relates to an optical fiber, in particular to a germanate glass optical fiber which can obtain luminescence of 1.5-2.2 μm under the excitation of a pump light of a certain wavelength. Background technique [0002] Fiber lasers have the advantages of small size, high beam quality, high energy conversion efficiency, and easy integration, and have now become the main research direction of solid-state lasers. Lasers with output wavelengths in the 1.5-2.2 μm band are eye-safe lasers and have broad application prospects in laser ranging, satellite remote sensing, tracer gas tracking, material processing, military scientific research, and surgery. In addition, 1.5-2.2μm fiber is expected to be used as a fiber amplifier for ultra-low loss long-distance communication in the future. Therefore, in recent years, glass fiber materials with luminescence of 1.5-2.2 μm have become a research hotspot. [0003] At present, the matrix materials of 1.5-2.2...

Claims

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Application Information

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IPC IPC(8): G02B6/02G02B1/02
Inventor 杨中民于胜磊徐善辉
Owner SOUTH CHINA UNIV OF TECH
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