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arXiv 2201.05836physics.optics
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大压缩因子下后压缩脉冲的时间质量

Temporal quality of post-compressed pulses at large compression factors

Esmerando Escoto, Anne-Lise Viotti, Skirmantas Alisauskas, Henrik Tünnermann, Ingmar Hartl, Christoph M. Heyl

摘要:

通过自相位调制对超短激光脉冲进行后压缩通常用于产生具有远远超过激光增益限制的光学带宽的激光脉冲。虽然可以常规地实现高压缩因子,但是压缩的脉冲通常遭受时间质量劣化。我们的数值和实验分析的时间质量的不同措施的恶化与压缩因子的增加,并显示如何适当的分散管理和级联的压缩后的过程可以限制这种效果的影响。在大的压缩因子下,脉冲质量下降的饱和度使基于后压缩皮秒甚至纳秒激光系统的新型飞秒激光器架构成为可能。

英文摘要:

Post-compression of ultra-short laser pulses via self-phase modulation is routinely employed for the generation of laser pulses with optical bandwidths reaching far beyond the laser gain limitations. While high compression factors can be routinely achieved, the compressed pulses typically suffer from temporal quality degradation. We numerically and experimentally analyze the deterioration of different measures of temporal quality with increasing compression factor and show how appropriate dispersion management and cascading of the post-compression process can be employed to limit the impact of this effect. The demonstrated saturation of pulse quality degradation at large compression factors puts novel femtosecond laser architectures based on post-compressed pico- or even nanosecond laser systems in sight.

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