Self-focusing and surface damage in fused-silica windows of variable thickness with UV nanosecond pulses

Herve Bercegol; Alain C. L. Boscheron; C. Lepage; Elizabeth Mazataud; Thierry Donval; Laurent Lamaignère; Marc Loiseau; Gerard Raze; Caroline Sudre

doi:10.1117/12.524841

10 June 2004 Self-focusing and surface damage in fused-silica windows of variable thickness with UV nanosecond pulses

Herve Bercegol, Alain C. L. Boscheron, C. Lepage, Elizabeth Mazataud, Thierry Donval, Laurent Lamaignère, Marc Loiseau, Gerard Raze, Caroline Sudre

Author Affiliations +

Proceedings Volume 5273, Laser-Induced Damage in Optical Materials: 2003; (2004) https://doi.org/10.1117/12.524841
Event: XXXV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, 2003, Boulder, Colorado, United States

Abstract

Variable experimental conditions were used to measure the occurrence of front surface, rear surface and filamentation damage in synthetic fused silica windows. Experiments were performed at 355 nm with a table-top beam of mm-size, and at 351 nm with ALISE laser, a 100 J installation. The 351 nm beam was about 3 cm wide at the entrance surface; it was single-mode temporally, with or without a frequency modulation which has the function of widening the spectrum to decrease Stimulated Brillouin Scattering. The 355 nm was single-mode temporally. Thin windows showed very scarce front damage and no filament damage at intensities which cause a high density of rear surface damage. Without any spectral widening, the thicker windows (4.3 cm) showed appreciable amount of front surface damage; filaments were observed and but no filaments. When a spectral modulation was added, front surface damage vanished, filaments and rear surface damage were observed.

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Herve Bercegol, Alain C. L. Boscheron, C. Lepage, Elizabeth Mazataud, Thierry Donval, Laurent Lamaignère, Marc Loiseau, Gerard Raze, and Caroline Sudre "Self-focusing and surface damage in fused-silica windows of variable thickness with UV nanosecond pulses", Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); https://doi.org/10.1117/12.524841

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