Seminarium Optyczne
sala 0.06, ul. Pasteura 5
2022-10-27 (10:15) 
mgr Arkadiusz Hudzikowski (Politechnika Wroclawska)
Spectral broadening and compression of ultrashort pulses of light in systems based on noble gases filled multi-pass cells
Spectral broadening and compression of ultrashort laser pulses is recently a widely investigated field dueto the availability of high power lasers. Multipass cells filled with noble gases are ideally suited for pulsebroadening in µJ and mJ energy range.This presentation shows the results of spectral broadening in a compact, Herriott multi-pass cellfilled successively with argon, xenon and krypton, and pulse compression using a dispersive mirror array.Multi-pass cell setup filled with noble gases was experimentally characterized for different pressures andenergies of the input pulses. The results of measurements were compared with simulations made with thecustom developed software based on direct ray tracing and the split-step Fourier method implemented inPyNLO library.A 280 fs, 110 µJ pulse was compressed down to 31.2 fs in a single-stage system based on the multipass cell filled with xenon at a pressure of 3.25 bar, which led to a compression ratio of 9.