Ying Wan, Jianxiang Wen, Chen Jiang, Fengzai Tang, Jing Wen, Sujuan Huang, Fufei Pang, Tingyun Wang. Over 255 mW single-frequency fiber laser with high slope efficiency and power stability based on an ultrashort Yb-doped crystal-derived silica fiber[J]. Photonics Research, 2021, 9(5): 649