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设计了级联式全光纤1018nm光源。该光源采用两级级联放大方案,实现了对低功率1018nm种子光的放大,获得了4.2W的最大输出功率,并分析了影响放大效率的因素。以获得的1018nm激光为抽运源,进行了1070nm信号光的同带抽运放大器实验研究,测量了放大器的输出特性。在纤芯抽运实验中,获得了明显的放大效果和较高的功率转换效率。进行了瓦量级包层同带抽运的实验研究,分析了导致包层抽运实验中功率转换效率偏低的原因并提出了解决方案。
The cascade all-fiber 1018nm light source is designed. The light source uses a two-stage cascaded amplification scheme to achieve the amplification of the low-power 1018nm seed light, the maximum output power of 4.2W was obtained, and the factors affecting the amplification efficiency were analyzed. Taking the obtained 1018nm laser as the pumping source, an experimental study of the same pump amplifier with 1070nm signal was carried out, and the output characteristics of the amplifier were measured. In the core pumping experiment, a significant amplification effect and a higher power conversion efficiency are obtained. An experimental study on the same level of cladding with pumping was carried out. The reasons for the low power conversion efficiency in the cladding pumping experiment were analyzed and the solutions were proposed.