中国激光, 2016, 43 (4): 0402005, 网络出版: 2016-03-29  

基于高功率窄线宽掺镱全光纤超荧光源的光谱合束

Spectral Beam Combining Based on High Power Narrow Linewidth Ytterbium-Doped All-Fiber Superfluorescent Source
作者单位
北京工业大学激光工程研究院, 北京 100124
摘要
全光纤结构超荧光光源各级均采用双包层掺镱光纤作为增益介质,中心波长为976 nm 和915 nm 的多模半导体激光器作为抽运源,利用窄线宽光纤布拉格光栅对宽带超荧光种子源进行滤波,经三级掺镱双包层光纤放大器放大,实现了中心波长分别为1060 nm 和1078 nm 的窄线宽超荧光稳定输出,输出功率分别达到57.4 W 和56.6 W,斜效率分别为66.6%和66.7%,放大后的窄线宽超荧光光源3 dB 光谱带宽均为0.05 nm。利用透射式衍射光栅对两路窄线宽超荧光进行光谱合束,实现了104.2 W 窄线宽超荧光输出,合束效率为91.3%,光束质量M2<1.7。
Abstract
We obtained stable narrow bandwidth superfluorescent sources with central wavelengths at 1060 nm and 1078 nm by using a segment of ytterbium-doped double-cladding fiber as the gain medium, multi-mode diode lasers operating at 976 nm and 915 nm as pumping sources, and fiber Bragg gratings as filters. Two three-stage high power fiber amplifier systems are used to boost the output power up to 57.4 W and 56.6 W respectively with the slope efficiencies of 66.6% and 66.7%. The superfluorescent bandwidths at 1060 nm and 1078 nm are 0.05 nm. Two output beams are spectrally combined with a transmission diffraction grating, the output beam is with the power of 104.2 W, power efficiency of 91.3% and the beam quality M2 is superior to 1.7.

魏守宇, 金东臣, 孙若愚, 曹镱, 侯玉斌, 王静, 刘江, 王璞. 基于高功率窄线宽掺镱全光纤超荧光源的光谱合束[J]. 中国激光, 2016, 43(4): 0402005. Wei Shouyu, Jin Dongchen, Sun Ruoyu, Cao Yi, Hou Yubin, Wang Jing, Liu Jiang, Wang Pu. Spectral Beam Combining Based on High Power Narrow Linewidth Ytterbium-Doped All-Fiber Superfluorescent Source[J]. Chinese Journal of Lasers, 2016, 43(4): 0402005.

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