摘要:
Michelson腔技术是实现激光相干合成的有效方案.利用Michelson腔技术,实现了全光纤结构下的两路光纤激光器的相干合成,获得了功率为11.75 W,效率为95.76%的相干输出.实验研究了相干合成效率与激光腔长差的关系以及抽运对称性对相干合成效率的影响.实验表明相干合成效率极易受激光腔长差的影响,不同腔长差下相干合成效率差异可达18%以上,且存在最佳腔长差;抽运对称性对相干合成效率的影响在2%以内.
Abstract:
Michelson cavity technique provides an effective solution for coherent beam combination. In this paper, coherent beam combi- nation of two fiber lasers by using an all-fiber Michelson cavity technique is demonstrated, and 11.75 W coherent output power with a coherent combination efficiency of 95.76% is obtained. The influences of the relation of coherent combination efficiency to laser cavity length difference, and the pump symmetry on coherent combination efficiency are studied experimentally. Experimental results show that the coherent combination efficiency is highly sensitive to the influence of laser cavity length difference, that the difference in combinination efficiency, induced by laser cavity length difference, can be as large as 18%, and that there is an optimal cavity length difference. The maximal influence of pump symmetry on coherent combination efficiency is within 2%, which can be neglected.
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