TIGER：时间门控电场重建
TIGER: TIme-Gated Electric field Reconstruction
摘要：
提出了一种新的自参考方法，用于超短光脉冲的时间特性（相位和振幅）。该技术称为时间门控电场重建（TIGER），测量由输入脉冲的四个时间延迟副本产生的二阶非线性信号（即，二次谐波产生或双光子吸收）。延迟空间编码的光束轮廓使用四面体的类光学元件。所提出的技术使Single Shot测量，不需要任何光谱测量，与众所周知的自参考表征方法。根据所选择的几何形状，记录的TIGER信号可以是干涉测量的（即，载波频率解析）或强度测量。本文介绍了该装置的工作原理，并进行了详细的理论分析。TIGER测量的各种激光脉冲的形状与他们的重建，然后展示了这种原始方法的相关性。
英文摘要：
We present a novel self-referenced method for the complete temporal characterization (phase and amplitude) of ultrashort optical laser pulses. The technique, called TIme-Gated Electric field Reconstruction (TIGER), measures a second-order nonlinear signal (namely, second harmonic generation or two-photon absorption) produced by four time-delayed replicas of the input pulse. The delays are spatially encoded in the beam profile using a four-faced pyramid-like optical element. The presented technique enables single shot measurement and does not require any spectral measurements, in contrast with well-known self-referenced characterization methods. Depending on the chosen geometry, the recorded TIGER signal can be either interferometric (i.e., carrier frequency resolved) or intensimetric. This paper describes the principle operation of the device together with a detailed theoretical analysis. TIGER measurements of various laser pulse shapes with their reconstructions are then presented demonstrating the relevance of this original approach.
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