脉冲光纤激光被动相干偏振合成研究
Polarized beam coherent combination of pulsed fiber
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摘要: 提出了脉冲激光被动相干偏振合成方案.利用光反馈环形腔结构实现多路激光的自组织被动锁相,利用级联偏振合柬的结构实现多路激光偏振合成,实现多路相干光束同轴输出.开展了4路脉冲激光相干偏振合成实验研究,获得了91.9%的合成效率,可获得时域、空域特性均十分稳定的合成脉冲激光.该方案为获得高功率脉冲光纤激光提供了一条可行的技术途径.Abstract: Polarized beam coherent combination of pulsed fiber laser is studied. The self-organizing passive phase lock of multilevel high power Yb-doped fiber amplifiers is achieved with optical feed-back ring cavity. Polarized beam coherent combination and multi-channel beam coaxial output are realized by using cascade polarized combining configuration. Polarized beam coherent combination of four Yb-doped fiber amplifiers is experimentally demonstrated, The efficiency of coherent combination is up to 91.9%. Stable combination pulsed fiber laser with temporal and spatial characteristic is achieved. This approach provides a feasible technique for power scaling of high-power pulsed fiber laser.
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