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10 April 1995 Development of high damage threshold optics for petawatt-class short-pulse lasers
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We report laser-induced damage threshold measurements on pure and multilayer dielectrics and gold-coated optics at 1053 and 526 nm for pulse durations, (tau) , ranging from 140 fs to 1 ns. Damage thresholds of gold coatings are limited to 500 mJ/cm2 in the subpicosecond range from 1053-nm pulses. In dielectrics, qualitative differences in the morphology of damage and a departure from the diffusion-dominated (tau) 1/2 scaling indicate that damage results from plasma formation and ablation for (tau) <EQ 10 ps and from conventional melting and boiling for (tau) > 50 ps. A theoretical model based on electron production via multiphoton ionization, Joule heating, and collisional (avalanche) ionization is in quantitative agreement with both the pulsewidth and wavelength scaling of experimental results.
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Brent C. Stuart, Michael D. Perry, Robert D. Boyd, Jerald A. Britten, Bruce W. Shore, Michael D. Feit, and Alexander M. Rubenchik "Development of high damage threshold optics for petawatt-class short-pulse lasers", Proc. SPIE 2377, Generation, Amplification, and Measurement of Ultrashort Laser Pulses II, (10 April 1995);

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