Pump and probe damage testing for investigation of transient material modifications associated with laser damage in optical materials

R. A. Negres; M. D. Feit; P. DeMange; J. D. Bude; S. G. Demos

doi:10.1117/12.750091

20 December 2007 Pump and probe damage testing for investigation of transient material modifications associated with laser damage in optical materials

R. A. Negres, M. D. Feit, P. DeMange, J. D. Bude, S. G. Demos

Author Affiliations +

Proceedings Volume 6720, Laser-Induced Damage in Optical Materials: 2007; 672019 (2007) https://doi.org/10.1117/12.750091
Event: Boulder Damage Symposium XXXIX: Annual Symposium on Optical Materials for High Power Lasers, 2007, Boulder, Colorado, United States

Abstract

Laser-induced breakdown in the bulk of transparent dielectric materials is associated with the generation of extreme localized conditions of temperatures and pressures. In this work, we perform pump and probe damage testing experiments to investigate the evolution of transient absorption by the host material arising from modifications following confined laser energy deposition in fused silica and DKDP materials. Specifically, we measure the size of the damage sites observed in the region of spatial overlap between the pump and probe pulses versus probe time delay and energy. Results of this proof-of-principle experimental work confirm that material modifications under extreme conditions created during a damage event include transient optical absorption. In addition, we found that the relaxation times of the induced absorption are very distinct for DKDP and SiO₂ even under identical excitation conditions, on the order of 100 ns and 100 μs, respectively.

Citation Download Citation

R. A. Negres, M. D. Feit, P. DeMange, J. D. Bude, and S. G. Demos "Pump and probe damage testing for investigation of transient material modifications associated with laser damage in optical materials", Proc. SPIE 6720, Laser-Induced Damage in Optical Materials: 2007, 672019 (20 December 2007); https://doi.org/10.1117/12.750091

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