飞秒Laser脉冲时空分割单次激发超快成像
Single-shot Ultrafast Imaging via Spatiotemporal Division of Femtosecond Laser Pulses
摘要：
我们已经开发出一种单次拍摄成像技术，可以捕获发生在飞秒到皮秒时间尺度上的超快事件。该技术是基于一种光学泵浦探测方法，其中多个时间延迟的飞秒脉冲同时探测泵浦激发的样品。在这里，我们使用两组2 × 2的反射镜阵列的空间/时间划分和路由的多个探测脉冲。这种单次激发方案已成功地应用于捕获空气中以光速传播的飞秒电离前沿，以及固体靶的激光诱导烧蚀。
英文摘要：
We have developed a single-shot imaging technique that can capture ultrafast events occurring on femtosecond to picosecond time scales. The technique is based on an optical pump-probe method, in which multiple time-delayed femtosecond pulses simultaneously probe a pump-excited sample. Here we use two sets of 2-by-2 mirror arrays for spatial/temporal division and routing of multiple probe pulses. This single-shot scheme is successfully applied to capture femtosecond ionization fronts propagating at the speed of light in air, as well as laser-induced ablation of solid targets.
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