Numerical Study of Spatial Chirp Distortion in Quasi-parametric Chirped-pulse Amplification
Numerical Study of Spatial Chirp Distortion in Quasi-parametric Chirped-pulse Amplification
复制标题
准参量啁啾脉冲放大中空间啁啾失真的数值研究
DOI:
10.1017/hpl.2022.10
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发表时间:
2022-05
期刊:
影响因子:
--
通讯作者:
Liejia Qian
中科院分区:
文献类型:
--
作者:
Yirui Wang;Jing Wang;Peng Yuan;Peng Yuan;Liejia Qian
Optical parametric chirped-pulse amplification is inevitably subject to high-order spatial chirp, particularly under the condition of saturated amplification and a Gaussian pump; this corresponds to an irreversible spatiotemporal distortion and consequently degrades the maximum attainable focused intensity. In this paper, we reveal that such spatial chirp distortion can be significantly mitigated in quasi-parametric chirped-pulse amplification (QPCPA) with idler absorption. Simulation results show that the quality of focused intensity in saturated QPCPA is nearly ideal, with a spatiotemporal Strehl ratio higher than 0.98. As the seed bandwidth increases, the idler absorption spectrum may not be uniform, but the Strehl ratio in QPCPA can be still high enough due to stronger idler absorption.
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