Kalashnikov M, Risse E, Schönnagel H, Husakou A, Herrmann J, Sandner W
Opt Express. 2004 Oct 18;12(21):5088-97. doi: 10.1364/opex.12.005088.
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.
研究了一种利用空气中偏振椭圆旋转的非线性滤波器。针对双啁啾脉冲放大（CPA）多太瓦钛宝石激光器，开发了增强时间对比度的方案。该激光器支持毫焦耳级的能量水平且效率很高。该方法可将放大自发辐射（ASE）基座、预脉冲和后脉冲抑制3个数量级，并且还能使脉冲前沿变陡。为了对结果进行物理解释，对滤波过程进行了数值模拟。
