Qiuhui Chu, Chun Zhang, Q. Shu, Chao Guo, Haoyu Zhang, Rumao Tao, Hong-huan Lin
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引用次数: 0
摘要
我们在后向泵浦结构的 2 kW 级偏振维持（PM）光纤激光器系统中研究了模式不稳定性（MI）对偏振消光比（PER）的影响。在实验过程中，随着 MI 的出现，PER 并没有下降，这表明 MI 效应对后向 PM 光纤放大器的 PER 影响不大。对泵浦配置引起的差异进行了理论分析，其原因在于 MI 效应引起的高阶模式纵向分布差异。
Impact of mode instability on polarization extinction ratio in backward pumped fiber amplifiers
The influence of mode instability (MI) on polarization extinction ratio (PER) has been investigated in a 2 kW level polarization-maintained (PM) fiber laser system with backward-pumped configuration, and the phenomena is different from the existing observation in forward-pumped PM fiber amplifiers. During the experiment, with the onset of MI, none decrease of PER has been observed, revealing that the MI effect has little impact on PER in backward PM fiber amplifiers. The discrepancy induced by the pump configuration has been theoretically analyzed, and the origin is attributed to the longitudinally-distribution difference of high order mode induced by the MI effect.
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