Journal
OPTICS EXPRESS
Volume 12, Issue 21, Pages 5088-5097Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPEX.12.005088
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A nonlinear filter using rotation of the polarization ellipse in air is investigated. Scheme to enhance the temporal contrast is developed for a double-CPA multi-terawatt Ti: sapphire laser. It supports an energy level of millijoule and has a high efficiency. The method allows suppression of the ASE pedestal, pre- and post-pulses by 3 orders of magnitude and also steepens the pulse front. For the physical interpretation of the results, numerical simulation of the filtering is performed. (C) 2004 Optical Society of America.
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