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利用紫外飞秒泵浦光束通过四波拉曼混频产生振动和转动发射。

Generation of vibrational and rotational emissions by four-wave Raman mixing using an ultraviolet femtosecond pump beam.

作者信息

Irie Y, Imasaka T

出版信息

Opt Lett. 1995 Oct 15;20(20):2072-4. doi: 10.1364/ol.20.002072.

DOI:10.1364/ol.20.002072
PMID:19862254
Abstract

A femtosecond KrF excimer laser is focused into molecular hydrogen to generate a multifrequency laser beam, consisting of many vibrational and rotational lines, in a transient Raman regime. The intensity distribution is unchanged from 5 to 13 atm, in contrast to the case of nanosecond laser pump. The efficiency for generation of the rotational lines is improved by increasing the peak power, especially at longer wavelengths, indicating power-dependent and wavelength-dependent behavior of this effect, as expected from theory.

摘要

飞秒KrF准分子激光聚焦到分子氢中，在瞬态拉曼区域产生由许多振动和转动谱线组成的多频激光束。与纳秒激光泵浦的情况相比，强度分布在5至13个大气压下保持不变。通过增加峰值功率，特别是在较长波长下，转动谱线的产生效率得到提高，这表明这种效应具有功率依赖性和波长依赖性，正如理论所预期的那样。

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