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Opt Lett. 2004 Mar 15;29(6):635-7.

Demonstration of coherent addition of multiple gratings for high-energy chirped-pulse-amplified lasers.

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  • 1Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA.


Petawatt solid-state lasers require meter-sized gratings to reach multiple-kilojoule energy levels without laser-induced damage. As an alternative to large single gratings, we demonstrate that smaller, coherently added (tiled) gratings can be used for subpicosecond-pulse compression. A Fourier-transform-limited, 650-fs chirped-pulse-amplified laser pulse is maintained by replacing a single compression grating with a tiled-grating assembly. Grating tiling provides a means to scale the energy and irradiance of short-pulse lasers.

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