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Proceedings Paper

Measurements of spontaneous emission redistribution phosphate glass
Author(s): R. G. Bikmatov; Alexander V. Charikov; V. M. Chernyak; V. G. Kuznetsov; Michael I. Pergament; Ruslan V. Smirnov; Victor I. Sokolov; John B. Trenholme
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Paper Abstract

This report presents results of a study of reabsorbed spontaneous emission (RSE) influence on the spatial inversion distribution in an active medium of large phosphate slab. Experimental results are also presented for a model case of active medium pumping by monopulse second harmonic of Nd-glass laser having specific profile of spatial distribution. RSE is observed for this case. A model is proposed for RSE simulation in solid bodies of arbitrary shape. It is shown that RSE influence is taken into account completely by first approximation, considering the rest fluorescence part of active medium to be an additional source of pump in order to define inversion in the arbitrary point of active medium. Fluorescence kinetics coincides with numerical results of a model experiment. Calculations are carried out of inversion redistribution due to RSE in a large aperture slab of phosphate glass demonstrating that spatial distribution distortions of inversion are small by the moment when inversion maximum is achieved, however, 10 - 12% of stored energy may relate to RSE effect at the absence of amplified spontaneous emission (ASE). Fluorescence kinetics measurements are carried out over slab cross-section demonstrating good agreement with model results.

Paper Details

Date Published: 8 December 1995
PDF: 12 pages
Proc. SPIE 2633, Solid State Lasers for Application to Inertial Confinement Fusion (ICF), (8 December 1995); doi: 10.1117/12.228276
Show Author Affiliations
R. G. Bikmatov, Troitsk Institute for Innovation and Fusion Research (Russia)
Alexander V. Charikov, Troitsk Institute for Innovation and Fusion Research (Russia)
V. M. Chernyak, Troitsk Institute for Innovation and Fusion Research (Russia)
V. G. Kuznetsov, Troitsk Institute for Innovation and Fusion Research (Russia)
Michael I. Pergament, Troitsk Institute for Innovation and Fusion Research (Russia)
Ruslan V. Smirnov, Troitsk Institute for Innovation and Fusion Research (Russia)
Victor I. Sokolov, Troitsk Institute for Innovation and Fusion Research (Russia)
John B. Trenholme, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 2633:
Solid State Lasers for Application to Inertial Confinement Fusion (ICF)
Michel Andre; Howard T. Powell, Editor(s)

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