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End-pumped 300 W continuous-wave ytterbium-doped all-fiber laser with master oscillator multi-stage power amplifiers
Shupeng Yin1, Ping Yan, Mali Gong
1Department of Precision Instruments, State Key Laboratory of Tribology, Center for Photonics and Electronics, Tsinghua University, Beijing, China. pyan@mail.tsinghua.edu.cn
Abstract:
An end-pumped ytterbium-doped all-fiber laser with 300 W output in continuous regime was reported, which was based on master oscillator multi-stage power amplifiers configuration. Monolithic fiber laser system consisted of an oscillator stage and two amplifier stages. Total optical-optical efficiency of monolithic fiber laser was approximately 65%, corresponding to 462 W of pump power coupled into laser system. We proposed a new method to connect power amplifier stage, which was crucial for the application of end-pumped combiner in high power MOPAs all-fiber laser.
