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

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...

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