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.
© 2004 Optical Society of America
Terrance J. Kessler, Joachim Bunkenburg, Hu Huang, Alexei Kozlov, and David D. Meyerhofer*, "Demonstration of coherent addition of multiple gratings for high-energy chirped-pulse-amplified lasers," Opt. Lett. 29, 635-637 (2004)