J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 601-605
New MLD gratings adapted for tiling in petawatt-class lasersJ. Flamand1, G. de Villèle1, A. Cotel1, B. Touzet1 and S. Kane2
1 HORIBA Jobin Yvon SAS, 16-18 rue du Canal, 91165 Longjumeau Cedex, France
2 HORIBA Jobin Yvon Inc., 3880 Park Avenue, Edison, New Jersey, 08820 USA, USA
Laser-induced damage threshold of gratings remains the main limiting factor towards generating higher-energy compressed pulses (terawatt and petawatt). HORIBA Jobin Yvon has first developed the manufacturing of large gold coated gratings, dimensions up to half a meter. Then we have developed large multilayer dielectric (MLD) gratings for working at 1.053 microns with 2 to 3 times higher damage threshold than gold coated gratings for ps pulses, and higher efficiency (up to 96% averaged over the full aperture). In addition these large MLD gratings are optimised for mosaic (tiling) configurations, in which the total useful grating length may reach 1 meter or more.
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