Generation of high-order rotational lines in hydrogen by four-wave Raman mixing in the femtosecond regime

被引：76

作者：

Kawano, H ^{[1
]}

Hirakawa, Y ^{[1
]}

Imasaka, T ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Chem Sci & Technol, Fukuoka 812, Japan

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 1998年 / 34卷 / 02期

关键词：

frequency conversion; nonlinear optics; optical mixing; Raman scattering; ultrafast optics;

D O I：

10.1109/3.658704

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

More than 40 rotational Raman lines are generated using an 800-fs Ti:sapphire laser. The spectral region extends from the near-infrared to the far-ultraviolet with a considerably flat intensity distribution. The effects of laser polarization, pulsewidth, hydrogen pressure, and focusing conditions on the efficiencies of stimulated Raman scattering, four-wave Raman mixing, self-phase modulation, self-focusing, and harmonic generation are investigated. A white light continuum, generated by self-phase modulation, acts as a seed beam for the generation of high-order rotational lines through four-wave Raman mixing, Strong self-phase modulation, however, suppresses the generation of the Raman emission, due to a line broadening of the pump beam. Thus, optimization of experimental conditions is necessary for the efficient generation of high-order rotational lines.

引用

页码：260 / 268

页数：9

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