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Proceedings Paper

Multilayer dielectric gratings for petawatt-class laser systems
Author(s): Jerald A. Britten; William A. Molander; Aleksey M. Komashko; Christopher P.J. Barty
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Paper Abstract

Existing Petawatt class lasers today based on Nd:glass architectures operating at nominally 500 J, 0.5 ps use meter-scale aperture, gold-overcoated master photoresist gratings to compress the amplified chirped pulse. Many lasers operating in the >1kJ, >1ps regime are in the planning stages around the world. These will require multilayer dielectric diffraction gratings to handle larger pulse energy than can be accommodated with gold gratings. Models of the electric field distribution in the solid material of these gratings suggest that high aspect-ratio structures used at high incidence angles will have better laser damage resistance. New tooling for transfer etching these submicron-grating patterns and for nondestructive critical-dimension measurement of these features on meter-scale substrates will be described.

Paper Details

Date Published: 10 June 2004
PDF: 7 pages
Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); doi: 10.1117/12.524015
Show Author Affiliations
Jerald A. Britten, Lawrence Livermore National Lab. (United States)
William A. Molander, Lawrence Livermore National Lab. (United States)
Aleksey M. Komashko, Lawrence Livermore National Lab. (United States)
Christopher P.J. Barty, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 5273:
Laser-Induced Damage in Optical Materials: 2003
Gregory J. Exarhos; Arthur H. Guenther; Norbert Kaiser; Keith L. Lewis; M. J. Soileau; Christopher J. Stolz, Editor(s)

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