基于配对误差补偿方法的拼接光栅压缩池理论研究

Theory of array-grating compressor based on in-pair compensation of errors

利用傅里叶光学方法,研究了一个基于配对误差补偿方法的单程拼接光栅压缩池系统,得到远场时域关于系统拼接误差的积分表达式,揭示了配对误差补偿方案下系统的群延迟、脉冲前沿倾斜、剩余啁啾效应对叠加后远场时域的影响规律.数值模拟表明:随着带宽增加,配对补偿法将导致脉冲远场时域展宽;对一个利用配对误差补偿的单程拼接光栅压缩池系统进行计算,得到该方案下各种拼接误差的容限;同时考虑所有误差的情况下得到系统的允许带宽曲线.

In terms of Fourier optics, a single-pass tiled-grating compressor based on in-pair compensation is studied and the amplitude expression of the output pulse from the compressor in the far-field is obtained, which disclose that effect of the group delay, the pulse front tilting and the residual chirping on the pulse-width in the far field. Numerical simulation shows that the pulse in the far field is broadened with increasing spectral width. For a typical single-pass tiled-grating compressor, the tolerance of each error is obtained and the allowed spectral width is obtained when all errors are considered.