Fourth-order dispersion compensation for ultra-high power femtosecond lasers
Fourth-order dispersion compensation for ultra-high power femtosecond lasers
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DOI：
10.1016/j.optcom.2015.08.047
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发表时间：
2015-12
影响因子：
2.4
通讯作者：
Zebiao Li;Cheng Wang;Shuai Li;Yi Xu;Lei Chen;Ya-ping Dai;Y. Leng
中科院分区：
文献类型：
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作者：
Zebiao Li;Cheng Wang;Shuai Li;Yi Xu;Lei Chen;Ya-ping Dai;Y. Leng
最近的拍瓦级飞秒啁啾脉冲放大激光器需要傅里叶变换极限脉冲来增加峰值功率，但这受到高阶色散残余物（例如四阶色散）的挑战。我们提出了一种稳定且经济的无源色散补偿方法，通过在展宽器和压缩器之间的标准啁啾脉冲放大系统中插入一个光栅对来完全消除静态二阶、三阶、特别是四阶色散。通过优化光栅对和压缩器可以实现最佳的色散补偿条件。与最新的无源色散补偿方法相比，实验结果表明，脉冲持续时间可以从35 fs进一步缩短至28 fs，压缩脉冲的峰值强度可以提高1.25倍，脉冲频谱上的光谱相位失真可以从12 rad降低到4 rad。
Fourier-transform-limit pulses are required by recent petawatt-class femtosecond chirped-pulse amplification lasers for increasing peak powers, but which are challenged by the residuals of the high orders of dispersion, for example the fourth-order dispersion. We propose a stable and economy passive dispersion compensation method to completely cancel out the static second-, third- and especially fourth-order dispersion by inserting a grism pair into the standard chirped-pulse amplification system between the stretcher and the compressor. The best dispersion compensation condition would be achieved by optimizing both the grism pair and the compressor. Compared with the recent passive dispersion compensation method, the experiment results show the pulse duration could be further reduced from 35 fs to 28 fs, the peak intensity of the compression pulse could be increased by 1.25 times, and the spectral phase distortion over the pulse spectrum could be reduced from 12 rad to 4 rad.