Compression of ultrashort laser pulses via gated multiphoton intrapulse interference phase scans
Compression of ultrashort laser pulses via gated multiphoton intrapulse interference phase scans
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DOI：
10.1364/josab.31.001118
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发表时间：
2014-01
影响因子：
1.9
通讯作者：
A. Comin;R. Ciesielski;G. Piredda;Kevin Donkers;A. Hartschuh
中科院分区：
文献类型：
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作者：
A. Comin;R. Ciesielski;G. Piredda;Kevin Donkers;A. Hartschuh
尽管在超短脉冲的产生方面取得了重大进展，但在高数值孔径显微镜物镜的焦平面中提供飞秒激光仍然是一个挑战。多光子脉冲内干涉相位扫描（MIIPS）是一种最常用的技术，用于校正通过透明介质传播引起的相位失真。然而，当存在高阶相位失真时，MIIPS的精度是有限的。在这里，我们介绍了一种改进，称为G-MIIPS，它避免了MIIPS的缺点，减少了高阶相位项的影响，并可以用来更有效地压缩宽带激光脉冲，即使是一个简单的4f脉冲整形器设置。在这项工作中，我们提出了MIIPS和G-MIIPS，这是有效的啁啾高斯脉冲的解析公式，我们显示了一个近似的解析表达式G-MIIPS，这是有效的任意脉冲形状。最后，我们通过实验和数值模拟证明了G-MIIPS的精度提高。
Delivering femtosecond laser light in the focal plane of a high numerical aperture microscope objective is still a challenge, despite significant developments in the generation of ultrashort pulses. One of the most popular techniques, used to correct phase distortions resulting from propagation through transparent media, is the multiphoton intrapulse interference phase scan (MIIPS). The accuracy of MIIPS, however, is limited when higher-order phase distortions are present. Here we introduce an improvement, called G-MIIPS, which avoids the shortcomings of MIIPS, reduces the influence of higher-order phase terms, and can be used to more efficiently compress broadband laser pulses even with a simple 4f pulse shaper setup. In this work, we present analytical formulas for MIIPS and G-MIIPS, which are valid for chirped Gaussian pulses; we show an approximated analytic expression for G-MIIPS, which is valid for arbitrary pulse shapes. Finally we demonstrate the increased accuracy of G-MIIPS via experiments and numerical simulations.