Design and fabrication of ＞20 KW 5?×?1 pump combiner with high efficiency

作者：Li Yuwei; Liu Yu; Li Fengyun; Liu Nian; Li Yue; Wu Wenjie; Huang Shan; Deng Anqi; He Honglei; Li Fang; Sun Shihao; Gao Cong; Zhang Haoyu; Wang Jianjun; Lin Honghuan; Zhao Longbiao; Jing Feng

来源：Optics and Laser Technology, 2023, 163: 109453.

DOI：10.1016/j.optlastec.2023.109453

• Pump combiner
• Fiber combiner
• High power fiber lasers

Design considerations and fabrication details of a high-efficiency 5?×?1 pump combiner with a brightness ratio of 1.05 are presented. Using five 135/155?μm NA?=?0.22 input fibers and a 310/341?μm NA?=?0.22 output fiber, the average efficiency of this 5?×?1 combiner is 98.71%, tested by a 915?nm laser diode (LD). In the case of using 1018?nm tandem-pumping laser as the test source, the combiner has been proved to have a transmission efficiency of not less than 99.95% for all 5 ports. Up to 20.91?kW combined power has been reached, and the temperature rise of the combiner is less than 10?°C at the highest output power, which demonstrates further power scaling ability by using pump source with higher power.(#br)OCIS codes: 140.3510,220.4610

• 单位
  中国工程物理研究院