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arXiv 1702.01965physics.optics
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类孤子laser脉冲自聚焦过程中的自压缩

Self-compression of soliton-like laser pulses in the process of self-focusing

A. A. Balakin, A. G. Litvak, V. A. Mironov, S. A. Skobelev

摘要:

研究了飞秒激光脉冲在群速度反常色散的非线性介质中,当波包的自聚焦功率大于临界自聚焦功率数倍时,实现有效自压缩的可能性.对三维波包随准孤子场分布演化的定性分析结果得到了计算机模拟的证实。模拟结果表明,对于初始持续时间约为10个光周期的高功率激光脉冲,由于非线性色散的影响,相对于压缩不稳定性,所考虑的压缩机制是稳定的。我们证明了自压缩的激光脉冲在几毫焦耳的能级和高达一个光学周期的能量效率超过50%的可能性。

英文摘要:

We study the possibility of efficient self-compression of femtosecond laser pulses in nonlinear media with anomalous dispersion of group velocity during the self-focusing of wave packets with a power several times greater than the critical self-focusing power. The results of qualitative analysis of the evolution of three-dimensional wave packets with the quasi-soliton field distribution are confirmed by the computer simulation. The simulation proves that the considered regime of compression of high-power laser pulses with initial durations of about ten optical cycles is stable relative to filamentation instability due to the influence of the nonlinear dispersion. We demonstrate the possibility of self-compression of laser pulses at a multi-millijoule energy level and up to one optical cycle with an energy efficiency of more then 50%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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