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Efficient generation of isolated attosecond pulses with high beam quality by two-color Bessel-Gauss beams

机译:两色贝塞尔-高斯光束可有效产生高光束质量的孤立阿秒脉冲

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摘要

The generation of isolated attosecond pulses with high efficiency and high beam quality is essential for attosecond spectroscopy. We numerically investigate the supercontinuum generation in a neutral rare-gas medium driven by a two-color Bessel-Gauss beam. The results show that an efficient smooth supercontinuum in the plateau is obtained after propagation and the spatial profile of the generated attosecond pulse is Gaussian-like with the divergence angle of 0.1 deg in the far-field. This bright source with high beam quality is beneficial for detecting and controlling the microscopic processes on attosecond time scale.
机译:高效率和高光束质量的孤立阿秒脉冲的产生对于阿秒光谱学至关重要。我们用数值方法研究了由双色贝塞尔高斯光束驱动的中性稀有气体介质中的超连续谱。结果表明,经过传播后,在高原地区获得了有效的光滑超连续谱,所产生的阿秒脉冲的空间分布呈高斯型,远场发散角为0.1度。这种高光束质量的亮光源有利于在亚秒级的时间范围内检测和控制微观过程。

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