Measurements of the nonlinear refractive index of air, N2, and O2 at 10 μm using four-wave mixing

被引:41
|
作者
Pigeon, J. J. [1 ]
Tochitsky, S. Ya. [1 ]
Welch, E. C. [1 ]
Joshi, C. [1 ]
机构
[1] Univ Calif Los Angeles, Dept Elect Engn, 405 Hilgard Ave, Los Angeles, CA 90095 USA
关键词
3RD HARMONIC-GENERATION; LASER-PULSES; FILAMENTATION; PLASMA; GASES; N2; PROPAGATION; EMISSION; SINGLE; GAAS;
D O I
10.1364/OL.41.003924
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report on measurements of the nonlinear index of refraction of air, N-2, and O-2 at a wavelength close to 10 mu m by collinear four-wave mixing of a 200 MW CO2 laser beat-wave. The use of a 200 ps long beat-wave comprising radiation amplified on the 10P20 and 10R16 lines of the CO2 laser provides a sensitive method to measure the small nonlinearities characteristic of the gas phase in a spectral region where no such data exists. (C) 2016 Optical Society of America
引用
收藏
页码:3924 / 3927
页数:4
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