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

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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 ... continued below

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Negres, R A; Feit, M D; DeMange, P; Bude, J D & Demos, S G October 18, 2007.

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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 SiO{sub 2} even under identical excitation conditions, on the order of 100 ns and 100 {micro}s, respectively.

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PDF-file: 7 pages; size: 1 Mbytes

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  • Presented at: Boulder Damage Symposium XXXIX, Boulder, CO, United States, Sep 24 - Sep 26, 2007

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  • Report No.: UCRL-PROC-235690
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 922322
  • Archival Resource Key: ark:/67531/metadc901093

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  • October 18, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 30, 2016, 7:03 p.m.

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Negres, R A; Feit, M D; DeMange, P; Bude, J D & Demos, S G. Pump and probe damage testing for investigation of transient material modifications associated with laser damage in optical materials, article, October 18, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc901093/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.