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Proceedings Paper

Measurement of the stimulated thermal Rayleigh scattering instability
Author(s): Thomas J. Karr; Michael C. Rushford; John R. Murray; James R. Morris
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Paper Abstract

We report the first clear experimental demonstration of large amplification of smallscale spatial perturbations by stimulated thermal Rayleigh scattering (STRS) of a CW laser beam propagating through an absorbing medium in a context normally associated with thermal blooming. A single-mode argon-ion laser beam with = 488 nm was propagated vertically downward through a 1 .2 m cell filled with CC14 that was doped with an absorber to have optical depths in the range 0.5-2.3 . A shear-plate interlerometer near the cell input generated the perturbation. Fringe growth was rapid and visually obvious, as was competing growth from dust specks, etc. The measured growth rate is in good agreement with the asymptotic rate from analytic STRS theory.

Paper Details

Date Published: 1 May 1990
PDF: 13 pages
Proc. SPIE 1221, Propagation of High-Energy Laser Beams Through the Earth's Atmosphere, (1 May 1990); doi: 10.1117/12.18351
Show Author Affiliations
Thomas J. Karr, Lawrence Livermore National Lab. (United States)
Michael C. Rushford, Lawrence Livermore National Lab. (United States)
John R. Murray, Lawrence Livermore National Lab. (United States)
James R. Morris, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 1221:
Propagation of High-Energy Laser Beams Through the Earth's Atmosphere
Peter B. Ulrich; LeRoy E. Wilson, Editor(s)

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