The design of an ultrafast double-pulse stretcher–compressor, which can be utilized in applications like Raman chirped adiabatic passage experiments, is presented. Experimental PG FROG traces obtained for a single-pulse output of such a stretcher–compressor support the design. However, the FROG traces of a double-pulse output are not intuitive and not fully retrievable. Therefore, a code was developed to simulate these FROG traces and investigate their dependence on the delay between the two slices of the double-pulse. The results are presented here and can be employed as a diagnostic tool in different applications where ultrafast laser double-pulses are used. The simulations reveal that the FROG traces strongly depend on the delay between the two slices of the double-pulse when this delay is comparable to the pulse duration. The simulations also suggest that using a transform-limited single-pulse as the gate in the PG FROG instrument leads to simpler FROG traces.

中文翻译：

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迈向超快双脉冲展宽器-压缩机

介绍了可用于拉曼啁啾绝热通道实验等应用的超快双脉冲展宽器-压缩机的设计。为这种展宽器 - 压缩机的单脉冲输出获得的实验 PG FROG 迹线支持该设计。然而，双脉冲输出的 FROG 轨迹并不直观且无法完全检索。因此，开发了一个代码来模拟这些 FROG 轨迹并研究它们对双脉冲两个切片之间延迟的依赖性。此处提供了结果，可在使用超快激光双脉冲的不同应用中用作诊断工具。模拟表明，当这种延迟与脉冲持续时间相当时，FROG 轨迹强烈依赖于双脉冲的两个切片之间的延迟。