10(-10) temporal contrast for femtosecond ultraintense lasers by cross-polarized wave generation.
10(-10) temporal contrast for femtosecond ultraintense lasers by cross-polarized wave generation.
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DOI：
10.1364/ol.30.000920
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发表时间：
2005-04
期刊：
影响因子：
3.6
通讯作者：
A. Jullien;O. Albert;F. Burgy;G. Hamoniaux;J. Rousseau;J. Chambaret;F. Augé-Rochereau;G. Chériaux-G.-Ché
中科院分区：
文献类型：
--
作者：
A. Jullien;O. Albert;F. Burgy;G. Hamoniaux;J. Rousseau;J. Chambaret;F. Augé-Rochereau;G. Chériaux-G.-Ché
我们利用BaF 2立方晶体中与chi（3）张量元相关的非线性特性来提高飞秒激光脉冲的时间对比度。提出的技术是基于交叉极化波（XPW）的产生。在毫焦耳范围内，我们获得了10%的透射效率和10（-10）的对比度。该滤波器不影响光谱形状或经清洁的脉冲的相位。它也是一种有效的空间滤波器。在这种方法中，对比度增强仅受偏振鉴别器件消光比的限制。
We take advantage of nonlinear properties associated with chi(3) tensor elements in BaF2 cubic crystal to improve the temporal contrast of femtosecond laser pulses. The technique presented is based on cross-polarized wave (XPW) generation. We have obtained a transmission efficiency of 10% and 10(-10) contrast with an input pulse in the millijoule range. This filter does not affect the spectral shape or the phase of the cleaned pulse. It also acts as an efficient spatial filter. In this method the contrast enhancement is limited only by the extinction ratio of the polarization discrimination device.