We propose a method for two-stage compression of laser pulses, which makes it possible to shorten laser pulses of tens of picoseconds to an optical period with an energy efficiency of tens of percent. The method involves sequential use of the Raman compression (compression to a duration of tens of femtoseconds and the self-compression of the pulse to the field period when exciting the wake plasma wave. In this case, the seed pulse is focused to the input of the second gas jet to achieve the relativistic intensity required for the self-compression realization when exciting the plasma wave.

中文翻译：

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产生具有少量场振荡的数兆瓦激光脉冲

我们提出了一种用于激光脉冲的两阶段压缩的方法，该方法可以将数十皮秒的激光脉冲缩短到光周期，且能量效率为百分之几十。该方法涉及顺序使用拉曼压缩（压缩到数十飞秒的持续时间，并且在激发唤醒等离子波时将脉冲自压缩到场周期。在这种情况下，种子脉冲会集中到脉冲的输入）。第二个气体射流在激发等离子体波时达到实现自压缩所需的相对论强度。