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Proceedings Paper

Which optical smoothing for LMJ and NIF?
Author(s): Josselin C. Garnier; Claude Gouedard; Laurent Videau; Arnold Migus
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Paper Abstract

This paper is concerned with the statistical comparison of 2D smoothing by spectral dispersion and smoothing by optical fiber, both techniques being proposed for uniform irradiation in plasma physics. In the asymptotic framework of a large number of elements of the random phase plate or excited optical modes of the fiber, closed-form expressions for the contrast and spatial spectrum of the integrated intensity of the speckle pattern are derived so as to put into evidence performance differences between these methods. These differences essentially originate from the much longer time delay induced by the multimode fiber with respect to the one induced by the gratings and from the interplay between the nature of the delay line vs. the nature of the spectral broadening.

Paper Details

Date Published: 8 December 1997
PDF: 12 pages
Proc. SPIE 3047, Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International Conference, (8 December 1997); doi: 10.1117/12.294312
Show Author Affiliations
Josselin C. Garnier, Ecole Polytechnique (France)
Claude Gouedard, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
Laurent Videau, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
Arnold Migus, Ecole Polytechnique (France)


Published in SPIE Proceedings Vol. 3047:
Solid State Lasers for Application to Inertial Confinement Fusion: Second Annual International Conference
Michel L. Andre, Editor(s)

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