Laser-induced damage in multilayer dielectric gratings due to ultrashort laser pulses

Bruce W. Shore; Brent C. Stuart; Michael D. Feit; Alexander M. Rubenchik; Michael D. Perry

doi:10.1117/12.228281

8 December 1995 Laser-induced damage in multilayer dielectric gratings due to ultrashort laser pulses

Bruce W. Shore, Brent C. Stuart, Michael D. Feit, Alexander M. Rubenchik, Michael D. Perry

Proceedings Volume 2633, Solid State Lasers for Application to Inertial Confinement Fusion (ICF); (1995) https://doi.org/10.1117/12.228281
Event: Solid State Lasers for Application to Inertial Confinement Fusion (ICF), 1995, Monterey, CA, United States

Abstract

Chirped pulse amplification is increasingly used to produce intense ultrashort laser pulses. When high efficiency gratings are the dispersive element, as in the LLNL Petawatt laser, their susceptibility to laser induced damage constitutes a limitation on the peak intensities that can be reached. To obtain robust gratings, it is necessary to understand the causes of short-pulse damage, and to recognize the range of design options for high efficiency gratings. Metal gratings owe their high efficiency to their high conductivity. To avoid the inevitable light absorption that accompanies conductivity, we have developed designs for high efficiency reflection gratings that use only transparent dielectric materials. These combine the reflectivity of a multilayer dielectric stack with a diffraction grating. We report here our present understanding of short-pulse laser induced damage, as it applies to dielectric gratings.

Citation Download Citation

Bruce W. Shore, Brent C. Stuart, Michael D. Feit, Alexander M. Rubenchik, and Michael D. Perry "Laser-induced damage in multilayer dielectric gratings due to ultrashort laser pulses", Proc. SPIE 2633, Solid State Lasers for Application to Inertial Confinement Fusion (ICF), (8 December 1995); https://doi.org/10.1117/12.228281

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