高功率线性偏振单频掺铥光纤主振荡功率放大器

High-power linearly-polarized single-frequency thulium-doped fiber Master-Oscillator Power-Amplifier.

作者信息

Pearson L, Kim J W, Zhang Z, Ibsen M, Sahu J K, Clarkson W A

机构信息

Optoelectronics Research Centre, University of Southampton, Southampton, UK.

出版信息

Opt Express. 2010 Jan 18;18(2):1607-12. doi: 10.1364/OE.18.001607.

DOI:10.1364/OE.18.001607

PMID:20173987

Abstract

We report a high power narrow-linewidth source at approximately 2 microm based on a Tm-doped fiber distributed-feedback master-oscillator and three Tm fiber amplifier stages. The master-oscillator and first two amplifier stages were in-band pumped by Er,Yb fiber lasers operating at 1565 nm, and the final stage amplifier was cladding-pumped at 795 nm by two spatially-combined diode-stacks. The MOPA yielded 100 W of single frequency output at 1943 nm with a beam propagation factor (M(2)) of 1.25 and with a polarization extinction ratio of >94%. The output power was limited by thermally-induced damage in the final amplifier stage. The prospects for further power scaling are considered.

摘要

我们报道了一种基于掺铥光纤分布反馈主振荡器和三级铥光纤放大器的高功率窄线宽光源，其波长约为2微米。主振荡器和前两级放大器由工作在1565纳米的铒镱光纤激光器进行带内泵浦，末级放大器由两个空间组合的二极管堆栈在795纳米进行包层泵浦。该主振荡功率放大器（MOPA）在1943纳米处产生了100瓦的单频输出，光束传输因子（M²）为1.25，偏振消光比大于94%。输出功率受到末级放大器中热致损伤的限制。文中还考虑了进一步功率扩展的前景。