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Mesures et contrôles temporels dans le domaine des lasers ultrabrefs.

Abstract : This work presents the development of a streak camera "jitter free" sweep unit synchronized on a femtosecond laser. This application of high voltage photoconductive switches ("High voltage A! uston switch") yields subpicosecond resolution for accumulated images on streak camera on a few hundreds microjoule femtosecond laser. Two others applications of these photoconductive switches are studied: - ultrafast optical commutation by a Pockels cell directly driven by a photoconductive switch (rising edge<100ps and jitter <2ps), - laser pulse energy self-stabilization experimentally proving that driving a Pockels cell by a photoconductive switch can increase the stability of the laser pulse energy from 7% to 0.7%rms. Additionally, the application of the acousto-optical programmable dispersive filter (Dazzler TM) to the self referenced spectral phase measurement is presented. As these measurements require a linear filter combined with a non linear filter, it is possible to replace the complete linear part (generally a complex optical set-up) by the Dazzler TM leading to new kind of linear filters and new measurements. Thus base-band autocorrelation and time-domain SPIDER (SPIDER by Fourier transform spectroscopy) have been demonstrated experimentally for the first time.
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Submitted on : Tuesday, July 27, 2010 - 2:32:13 PM
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Thomas Oksenhendler. Mesures et contrôles temporels dans le domaine des lasers ultrabrefs.. Optique [physics.optics]. Ecole Polytechnique X, 2004. Français. ⟨pastel-00001347⟩

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