Chirp-matching OPCPA scheme for eliminating pre-pulse of ultrashort laser pulse
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摘要: 采用了一种利用啁啾匹配光参量啁啾脉冲放大（OPCPA）技术来消除泵浦脉冲时间窗口内的预脉冲的方法，并对该方法展开了数值模拟研究。分析了泵浦光脉冲形状、预脉冲提前时间等因素对预脉冲消除效果以及信噪比提升情况的影响。通过与传统的非共线OPCPA方案对比，发现啁啾匹配OPCPA方案可以消除掉离主脉冲更近的预脉冲，且它对预脉冲的消除效果受泵浦光脉冲形状的影响较小。Abstract: The paper proposes a method using chirp-matching optical parametric chirped pulse amplification (OPCPA) scheme to eliminate the pre-pulse within the gain time window defined by the pump duration is proposed. The effects of the pump pulse shape, as well as the delay time between main pulse and pre-pulse on the improvement of signal-to-noise ratio are analyzed. using numerical simulation Comparing the chirp-matching OPCPA scheme with the conventional noncollinear OPCPA scheme, it is shown that the chirp-matching OPCPA scheme can eliminate a pre-pulse which is much closer to the main pulse, and it depends less on the pump pulse shape.
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