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Kalashnikov, M; Risse, E; Schönnagel, H; Husakou, A; Herrmann, J; Sandner, W
Optics express, 10/2004, Letnik: 12, Številka: 21Journal Article
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.
