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Proceedings Paper

Estimation of focused laser beam SBS (stimulated Brillouin scatter) threshold dependence on beam shape and phase aberrations
Author(s): Charles W. Clendening
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Paper Abstract

In many applications it is desirable to be able to accurately predict the SBS threshold of a given laser beam. Existing physical optics computer codes which solve the problem iteratively and include pump depletion do this routinely for one dimensional cases. However, if a high spatial resolution or a large number of cases are required this approach becomes intractable for two dimensional calculations. As an alternative approach threshold scaling can be estimated with reasonable accuracy by ignoring pump depletion and integrating the intensity weighted average gain along the propagation path. This technique has been applied to several cases of interest. For one dimensional aberrations the results compare favorably with more comprehensive BRIWON code predictions and with experimental data. The effects of both beam shape and two dimensional segmented mirror aberrations have also been evaluated. The results are in reasonable agreement with experimental data. General implications for other classes of aberration have also been assessed and are reported.

Paper Details

Date Published: 1 May 1991
PDF: 7 pages
Proc. SPIE 1415, Modeling and Simulation of Laser Systems II, (1 May 1991); doi: 10.1117/12.43679
Show Author Affiliations
Charles W. Clendening, TRW Space and Technology Group (United States)

Published in SPIE Proceedings Vol. 1415:
Modeling and Simulation of Laser Systems II
Alvin D. Schnurr, Editor(s)

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