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Proceedings Paper

Optical orientation in gases
Author(s): Zdzislaw Blaszczak
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Paper Abstract

The paper reports results of investigation of the phenomenon of optical orientation induced by a strong laser beam (optical field) in optically isotropic media. The mechanisms of the phenomenon are indicated and its statistical -- molecular theory is given. Investigation of the phenomenon of optical orientation can provide important information on transparent media allowing a determination of their local structure and microscopic parameters of molecules. This method is particularly useful in the studies of the character and strength of interactions in the gas phase in which these parameters can be easily controlled by changing the gas temperature and pressure. The apparatus used for measuring the effect is briefly described but the main attention has been paid to optical Kerr effect measurements in gases, in particular in carbon dioxide, which is highly suitable for these kinds of measurements as it is easy to study it in different phases and moreover in the vicinity of the critical point. Investigation of carbon dioxide in gas phase was performed in the nanosecond time domain and in a wide range of pressures and temperatures. A detailed interpretation of the results presented in tables and figures is given, and a new method for determination of the orientational relaxation time on optical Kerr effect measurements in the nanosecond time range, is proposed.

Paper Details

Date Published: 14 August 1997
PDF: 12 pages
Proc. SPIE 3186, Laser Technology V: Physics and Research and Development Trends, (14 August 1997); doi: 10.1117/12.280481
Show Author Affiliations
Zdzislaw Blaszczak, Adam Mickiewicz Univ. (Poland)

Published in SPIE Proceedings Vol. 3186:
Laser Technology V: Physics and Research and Development Trends
Wieslaw L. Wolinski; Michal Malinowski, Editor(s)

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