Dorrer C, Bahk S-W
Opt Express. 2018 Dec 10;26(25):33387-33399. doi: 10.1364/OE.26.033387.
Spatio-temporal coupling in the field of ultrashort optical pulses is a technical enabler for applications but can result in detrimental effects such as increased on-target pulse duration and decreased intensity. Spectrally resolved spatial-phase measurements of a broadband field are demonstrated using a custom multispectral camera combined with two different wavefront sensors: a multilateral spatial shearing interferometer based on an amplitude checkerboard mask and an apodized imaged Hartmann sensor. The spatially and spectrally resolved phase is processed to quantify the commonly occurring pulse-front tilt and radial group delay, which are experimentally found to be in good agreement with models.
超短光脉冲领域中的时空耦合是应用的一项技术支撑，但可能会导致有害影响，如目标脉冲持续时间增加和强度降低。利用定制的多光谱相机结合两种不同的波前传感器，演示了宽带场的光谱分辨空间相位测量：一种基于振幅棋盘掩模的多边空间剪切干涉仪和一种变迹成像哈特曼传感器。对空间和光谱分辨的相位进行处理，以量化常见的脉冲前沿倾斜和径向群延迟，实验发现它们与模型吻合良好。
