Pressure Dependence of Degenerate Four-Wave Mixing in SO2: Effect of the Thermal Gratings
Author(s) -
Shiming Shi,
Deying Chen,
Zheng Qi-Ke,
Maria D. Person,
QiZong Qin
Publication year - 2000
Publication title -
laser chemistry
Language(s) - English
Resource type - Journals
eISSN - 1026-8014
pISSN - 0278-6273
DOI - 10.1155/2000/94548
Subject(s) - mixing (physics) , degenerate energy levels , thermal , chemistry , four wave mixing , pressure wave , optics , physics , mechanics , thermodynamics , quantum mechanics , nonlinear optics , laser
The degenerate four wave mixing (DFWM) spectrum of the A(1A2)← X(1A1) and B(1B1)← X(1A1) transitions of SO2 in the 299.5–305 nm region is presented. It has been found that the DFWM signal intensities are proportional to the cube of laser intensity and the square of SO2 pressure. The DFWM signal increases dramatically with the pressure of N2 as a buffer gas. The enhancement of the DFWM signal can be mainly attributed to the thermal grating contribution.
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