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中文摘要：
在飞秒宽带激光脉冲成丝过程中，由于双光束干涉效应而形成的空间等离子体光栅，研究了空气中飞秒宽带激光脉冲成丝所产生的超连续谱增强效应，并进一步观测到泵浦光脉冲成丝产生的超连续谱能量向较弱的未成丝的探测光脉冲转移，有效拓展探测光脉冲带宽的新现象．通过基于布拉格衍射特性的理论计算较好地解释了实验结果．
英文摘要：
We experimentally investigate the plasma grating created by two intersecting ultrashort laser pulses, and its effects on the supercontinuum generated from femtosecond laser filamentation. The enhanced supercontinuum generation is observed, with a plasma grating formed. And an energy transfer of the supercontinuum is demonstrated, from one pulse to the other, due to the diffraction property of plasma grating. The theoretical calculation accords well with the experimental result.
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