学術雑誌論文 High-dynamic-range cross-correlator for shot-to-shot measurement of temporal contrast

今, 亮  ,  西内, 満美子  ,  桐山, 博光  ,  小倉, 浩一  ,  森, 道昭  ,  榊, 泰直  ,  神門, 正城  ,  近藤, 公伯

56 ( 1 )  , pp.012701-1 - 012701-6 , 2017-01 , JSAP
内容記述
The temporal contrast of an ultrahigh-intensity laser is a crucial parameter for laser plasma experiments. We have developed a multichannel crosscorrelator (MCCC) for single-shot measurements of the temporal contrast in a high-power laser system. The MCCC is based on third-order crosscorrelation, and has four channels and independent optical delay lines. We have experimentally demonstrated that the MCCC system achieves a high dynamic range of >10^12 and a large temporal window of >1 ns. Moreover, we were able to measure the shot-to-shot fluctuations of a short prepulse intensity at -26 ps and long-pulse (amplified spontaneous emission, ASE) intensities at -30, -450, and -950 ps before the arrival of the main pulse at the interaction point.

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