Optical bleaching kinetics of ethylene observed with pulsed infrared laser-excited photothermal lens spectroscopy

Stephen E. Bialkowski; Zhi-fang He

doi:10.1117/12.181353

27 July 1994 Optical bleaching kinetics of ethylene observed with pulsed infrared laser-excited photothermal lens spectroscopy

Stephen E. Bialkowski, Zhi-fang He

Author Affiliations +

Proceedings Volume 2138, Longer Wavelength Lasers and Applications; (1994) https://doi.org/10.1117/12.181353
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

An overview of the practice of accurate pulsed laser photothermal spectroscopy and the model relating the observed photothermal lens spectroscopy signal to the nonlinear absorption coefficients is given. Details of the assumptions used to derive the vibrational energy state model and the probable excited states involved in the kinetic saturation are discussed. Saturation irradiance and related parameters for ethylene in Ar, He, and N₂ buffer gases are given and discussed in light of vibrational relaxation rate constants.

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Stephen E. Bialkowski and Zhi-fang He "Optical bleaching kinetics of ethylene observed with pulsed infrared laser-excited photothermal lens spectroscopy", Proc. SPIE 2138, Longer Wavelength Lasers and Applications, (27 July 1994); https://doi.org/10.1117/12.181353

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