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Proceedings Paper

Diffraction Properties Of Laser Speckle Generated By Stimulated Rotational Raman Scattering In Long Air Paths*
Author(s): Mark A Henesian; Deanna M Pennington
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Paper Abstract

We discuss the unusual diffraction properties of laser speckle and related structures generated by stimulated rotational Raman scattering (SRRS) from nitrogen in long air paths with collimated, large aperture beams. We have obtained convincing evidence for the four-wave parametric gain suppression of SRRS and enhancement of nonlinear diffraction by Raman-induced Kerr effect in this high Fresnel number geometry. These phenomena significantly influence the beam filamentation and speckle structures observed in the near and far fields. We contrast present observations with previous SRRS experiments at Lawrence Livermore National Laboratory using the Nova Laser.

Paper Details

Date Published: 8 April 1988
PDF: 15 pages
Proc. SPIE 0874, Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation, (8 April 1988); doi: 10.1117/12.943798
Show Author Affiliations
Mark A Henesian, Lawrence Livermore National Laboratory (United States)
Deanna M Pennington, Lawrence Livermore National Laboratory (United States)


Published in SPIE Proceedings Vol. 0874:
Nonlinear Optical Beam Manipulation, Beam Combining, and Atmospheric Propagation
Robert A. Fisher, Editor(s)

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