同带泵浦高功率超荧光光源

Tandem pumped powerful superfluorescent fiber source

报道了一台基于同带泵浦技术的主振荡功率放大(MOPA)结构超荧光光纤光源。首先利用自行搭建的超荧光种子源获得了半高全宽(FWHM)线宽10.3 nm的宽谱超荧光种子,经光谱滤波得到FWHM线宽1.8 nm的窄谱种子光;种子光经二级预放大器放大至104.4 W后注入主放大器;主放大器最高输出功率3.14 k W,最高输出功率时光光转换效率80.74%,光谱FWHM线宽4.68 nm,光束质量因子为1.59。进一步提高系统泵浦功率有望获得更高功率输出。

This paper presents the high-power master-oscillator-main-amplifier（MOPA） structured superfluorescent fiber source（SFS） based on tandem pumping technology for high output power. Firstly, broadband seed source is generated from the home-made superfluorescent source with a full-width at half-maximum （FWHM） linewidth of 10.3 nm. Then, narrowband seed source with a FWHM linewidth of 1.8 nm is obtained by employing spectral filter. The narrowband seed light is enhanced to 104. 4 W with the aid of two pre-amplifiers. As to the main amplification stage, the ultimate output power is 3.14 kW with an optical- to-optical conversion efficiency of 80.74%. The corresponding FWHM linewidth and/V/z values of the amplified light are 4.68 nm and 1.59, respectively. Furthermore, the output power is only limited by the pump power, and further power scaling of this SFS system is available.