Yb3+ doped tellurate glass doubly coated fiber and preparing method thereof

Abstract

It is a tellurate glass double-layer fiber mixed with Yb#+[3+] and its process method, which uses tellurate glass system as fiber core material of the fiber and uses tellurate glass system with matching refractive index, expansion index and intenerate temperature with the core material as inner layer. The method is the following: to choose matchable fiber core and inner layer glass materials; to melt them; to process pre-made bar to form core composite; finally to do fiber pulling to plastic package layer coating and fixing to make the double-layer fiber.

Description

technical field [0001] The present invention relates to double-clad optical fiber, especially a kind of Yb 3+ Doped tellurite glass double-clad optical fiber and its preparation method. Background technique [0002] A fiber laser is a laser resonator composed of an optical fiber doped with certain rare earth elements and an optical feedback element. Under the action of pump light, the doped optical fiber generates stimulated emission in the medium and emits a certain wavelength of laser light. It has low Threshold, high efficiency, narrow linewidth, tunability and other advantages. The original fiber laser directly coupled the pump light into the fiber core with a diameter of less than 10 μm, resulting in low coupling efficiency and low output power of the fiber laser, which limited its application range. In order to improve the coupling efficiency, in recent years, a double-clad fiber has been developed internationally. Because it has an inner cladding with a large cross-...

AI Technical Summary

Problems solved by technology

due to Yb 3+ Ions are prone to clustering in the quartz matrix, causing a sharp decrease in the fluorescence lifetime, which seriously affects the absorption efficiency of the pump light

[0006] (2)Yb 3+ Less gain in quartz matrix

[0007] (3) The adjustable range of the double-clad optical fiber composition of the quartz matrix is ​​small

[0008] (4) The preparation process of double-clad optical fiber with quartz matrix is ​​complicated and the cost is high

Yb 3+ Doped tellurite glass has a large emission cross-section and a wide fluorescence linewidth, making it an ideal host material for lasers, but its poor anti-devitrification ability makes fiber lasers based on tellurite glass matrix still in the development stage

Domestic for Yb 3+ Research on doped fiber lasers is in its infancy, and for Yb 3+ Doped tellurite glass fibers are less studied

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