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Proceedings Paper

Influence of fluorination on the lasing efficiency of laser active media
Author(s): Irina V. Sokolova; Nina Vasil'eva
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Paper Abstract

Theoretical and experimental results of studies on the fluorosubstituted derivatives of coumarines are presented. The emission properties have been investigated under XeCl*- laser excitation ((lambda) equals 308 nm). The quantum chemical algorithms and programs are based on the semiempirical method with intermediate neglect of differential overlapping involving particular spectroscopic parametrization. The intermolecular donor-acceptor interactions have been researched using molecular electrostatic potential method. It is shown that the fluorination leads to longer lasting lifetime (E1/2) both due to high strength of CF-bond and to absence of the absorption of the final photoproducts in the lasing region. The introducing of F atoms at the photochemically active positions to the molecules reduces the rate of formation of the secondary photodecomposition products. The radiative and nonradiative relaxation constants of the excitation energy are calculated.

Paper Details

Date Published: 29 June 1998
PDF: 6 pages
Proc. SPIE 3403, International Conference on Atomic and Molecular Pulsed Lasers II, (29 June 1998); doi: 10.1117/12.311940
Show Author Affiliations
Irina V. Sokolova, Siberian Physical Technical Institute (Russia)
Nina Vasil'eva, Siberian Physical Technical Institute (Russia)

Published in SPIE Proceedings Vol. 3403:
International Conference on Atomic and Molecular Pulsed Lasers II
Victor F. Tarasenko; Georgy V. Mayer; Gueorgii G. Petrash, Editor(s)

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