Absorption of ultrashort laser pulses in medium with account for propagation effects

V. Astapenko
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引用次数: 0

Abstract

The absorption of short laser pulses in an optically dense medium is theoretically studied based on the total absorption coefficient over the entire duration of the pulse, taking into account the effects of propagation and reflection of pulse from vacuum/medium interface. The approach is the generalization of our previous work [1], which traced a “bridge” between the micro- and macro-description of radiation processes in a medium induced by electromagnetic pulses of arbitrary duration. The expression for the total absorption coefficient is obtained in terms the complex refractive index of the medium. Various limits of this expression are considered. Numerical calculations of the dependence of the total absorption coefficient on the parameters of the laser pulses and the thickness of the medium layer were carried out and the results obtained were discussed.
超短激光脉冲在介质中的吸收并考虑传播效应
考虑到脉冲从真空/介质界面传播和反射的影响,我们根据脉冲整个持续时间内的总吸收系数,对短激光脉冲在光学致密介质中的吸收进行了理论研究。该方法是我们之前研究成果[1]的概括,在任意持续时间的电磁脉冲诱导的介质辐射过程的微观和宏观描述之间架起了一座 "桥梁"。根据介质的复折射率可以得到总吸收系数的表达式。对该表达式的各种极限进行了考虑。对总吸收系数与激光脉冲参数和介质层厚度的关系进行了数值计算,并对计算结果进行了讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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