||Retrieval of Vacuum-Ultraviolet Waveform and Plasma Mirror Reflectivity Using Frequency-Resolved Optical Gating
ITAKURA, Ryuji ,
KUMADA, Takayuki ,
NAKANO, MotoyoshiAKAGI, Hiroshi
We demonstrate the method to measure (i) the waveform of a vacuum-ultraviolet (VUV) pulse and (ii) the time-dependent reflectivity of a plasma mirror based on the concept of frequency-resolved optical gating. Time-resolved VUV reflection spectroscopy of fused silica excited by an intense femtosecond laser pulse is performed. The measured spectrogram is analyzed using the least-square generalized projections algorithm. The present method enables us not only to retrieve a significantly chirped VUV pulse with the duration longer than 1 ps, but also to investigate the electronic excitation dynamics in laser-plasma formation.
The 5th Advanced Lasers and Photon Sources (ALPS’16)