Dependence of NO<sub>2</sub> degenerate four-wave-mixing signals on buffer gas pressure

John D. Garman; Derek Dunn-Rankin

doi:10.1117/12.145689

24 May 1993 Dependence of NO₂ degenerate four-wave-mixing signals on buffer gas pressure

John D. Garman, Derek Dunn-Rankin

Proceedings Volume 1862, Laser Applications in Combustion and Combustion Diagnostics; (1993) https://doi.org/10.1117/12.145689
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Measurements of degenerate four-wave mixing (DFWM) from NO₂ are presented as a function of buffer gas pressure and laser power. The signal strength first decreases and then increases with increasing buffer gas pressure. This dependence on buffer gas pressure is apparently due to the onset of thermal gratings. In the regime where thermal gratings are the dominant source of DFWM signals, the DFWM signal intensity increases as the square of the laser power until saturation.

Citation Download Citation

John D. Garman and Derek Dunn-Rankin "Dependence of NO₂ degenerate four-wave-mixing signals on buffer gas pressure", Proc. SPIE 1862, Laser Applications in Combustion and Combustion Diagnostics, (24 May 1993); https://doi.org/10.1117/12.145689

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