We describe a high-speed single-shot multi-frame interferometric imaging technique enabling multiple interferometric images with femtosecond exposure time over a 50 ns event window to be recorded, following a single laser-induced excitation event. The stroboscopic illumination of a framing camera is made possible through the use of a doubling cavity that produces a femtosecond pulse train that is synchronized to the gated exposure windows of the individual frames of the camera. The imaging system utilizes a Michelson interferometer to extract phase and ultimately displacement information. We demonstrate the method by monitoring laser-induced deformation and the propagation of high-amplitude acoustic waves in a silicon nitride membrane. The method is applicable to a wide range of fast irreversible phenomena such as crack branching, shock-induced material damage, cavitation, and dielectric breakdown.

中文翻译：

---

用于观察不可逆现象的飞秒频闪脉冲串多帧干涉成像

我们描述了一种高速单次多帧干涉成像技术，能够在单个激光诱导激发事件之后记录多个具有飞秒曝光时间超过 50 ns 事件窗口的干涉测量图像。分幅相机的频闪照明是通过使用倍频腔实现的，该倍腔产生飞秒脉冲序列，该脉冲序列与相机各个帧的门控曝光窗口同步。成像系统利用迈克尔逊干涉仪来提取相位和最终的位移信息。我们通过监测激光引起的变形和高振幅声波在氮化硅膜中的传播来演示该方法。该方法适用于范围广泛的快速不可逆现象，如裂纹分支、