Vol. 3, issue 01, article # 2

pdf Ivanov S. V., Panchenko V. Ya. Nonstationary absorption of radiation within a vibrational band with a random rotational structure. // Atmospheric and oceanic optics. 1990. V. 3. No. 01. P. 7-10.
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Nonlinear nonstationary absorption of infrared laser radiation within vibrational bands of molecules with dense quasirandom rotational structure, which is typical of a number of atmospheric components, is considered. An analytic expression for the probability of incoherent photoexcitation of a vibrational transition is obtained. The conditions for nonstationary rotational population effects to be strong are determined; the role of laser pulse shape and duration is analyzed. These effects are estimated for O3 molecules under laboratory and atmospheric conditions.