Wang Jing, Ma Jingui, Wang Yongzhi, Yuan Peng, Xie Guoqiang, Qian Liejia
Opt Lett. 2014 Apr 15;39(8):2439-42. doi: 10.1364/OL.39.002439.
We report a method for filtering out the noises produced in optical parametric chirped-pulse amplifiers by dressing the seed beam with spatial chirp. After dechirping the amplified signal with a compressor, the noises experience a spatiotemporal coupling, making themselves highly distinguishable from the compressed signal in space, and hence supporting noise filtering effectively and expediently in the spatial domain, which would otherwise not be possible. Numerical simulations performed for the proposed method show the capabilities of an order of magnitude reduction in the noise energy and several orders of magnitude enhancement in the temporal contrast.
我们报告了一种通过用空间啁啾修饰种子光束来滤除光学参量啁啾脉冲放大器中产生的噪声的方法。在用压缩器对放大信号进行去啁啾之后，噪声经历时空耦合，使其在空间上与压缩信号高度可区分，从而在空间域中有效且便捷地支持噪声滤波，否则这是不可能实现的。对所提出方法进行的数值模拟表明，该方法能够将噪声能量降低一个数量级，并将时间对比度提高几个数量级。
