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基于国产光纤构建了直接抽运全光纤化主控振荡器功率放大器结构光纤激光器,放大级分别采用武汉烽火锐光科技有限公司和中国电子科技集团公司第四十六研究所提供的国产20/400μm掺镱双包层光纤作为增益光纤,通过全国产化放大级实现了3050和3092 W的1080 nm激光输出.放大级提取效率分别为67.3%和68.2%,光-光效率分别为63.0%和63.9%.据可查询资料,这是公开报道的直接抽运全光纤激光输出的最高水平,同时由于采用了国产光纤作为放大级增益光纤,表明国产光纤具备了3 k W级光纤激光器输出能力.通过国产光纤横截端面以及光纤熔接显微镜图像实验分析知,光纤制造工艺的不足是导致国产光纤激光器效率低的主要原因.继续改进光纤工艺,提升抽运功率,优化光纤长度,有望实现更高功率的全国产化光纤激光器输出.
Based on the domestic optical fiber, a direct pumping full-fiber main control oscillator power amplifier structure fiber laser was constructed. The amplification stages were respectively made by Wuhan Beacon Ruiguang Technology Co., Ltd. and China Electronics Technology Group Corporation No. 46 Research Institute. Ytterbium-doped double-clad fiber is used as gain fiber, and the output of 1080 nm laser at 3050 and 3092 W is achieved through the nationalized amplification stage.The extraction efficiency of amplification stage is 67.3% and 68.2% respectively, and the light-optical efficiency is 63.0% and 63.9% respectively According to the available information, this is the highest level of publicly-reported direct pumping full fiber laser output, meanwhile, the domestic optical fiber is used as the amplification gain fiber, indicating that the domestic optical fiber has the output capability of 3 k W fiber laser, Domestic fiber cross-section end face and fiber splicing microscope image analysis shows that the lack of fiber manufacturing process is the main reason leading to the low efficiency of domestic fiber laser. Continued to improve the fiber technology to enhance the pumping power, optimize the fiber length, is expected to achieve higher power The national production of fiber laser output.