High-Acquisition-Rate Single-Shot Pump-Probe Measurement using Chirped-Fiber Bragg Gratings

Multi-timescale dynamics, from femtoseconds to milliseconds, for irreversible phenomena have been of fundamental importance in understanding mechanisms of chaotic phenomena, electronic bunch evaluation of an accelerator, photoinduced phase transitions, laser ablation, etc. Recently, several groups reported high acquisition rate single-shot methods using chirped-pulse single-shot detections and photonic time-stretching [1-3]. In these works, however, the long fiber with the length of several km was used to temporally stretch the time-encoded spectrum by the group velocity dispersion, but his long distance degrades the signal-to-noise ratio due to propagation losses of the probe pulses through the fiber, thus limiting the observable phenomena.