Development of a novel large damage site mitigation technique

Allison Browar; Eyal Feigenbaum; Isaac Bass; Jim Vickers; Gabe Guss; Wren Carr

doi:10.1117/12.2642467

2 December 2022 Development of a novel large damage site mitigation technique

Allison Browar, Eyal Feigenbaum, Isaac Bass, Jim Vickers, Gabe Guss, Wren Carr

Proceedings Volume 12300, Laser-Induced Damage in Optical Materials 2022; 1230004 (2022) https://doi.org/10.1117/12.2642467
Event: SPIE Laser Damage, 2022, Rochester, New York, United States

Abstract

We present the development of carefully tailored shape - increased size (0.9 mm diameter) input surface mitigation sites that shadow and thus supress damage growth on the exit surface of optics. Results from downstream intensification measurements and laser induced damage experiments are presented. The results show a 6X reduction in expanding wave intensification on the exit surface of an optic, being the dominant damage onset mechanism. The tailored rounded cone design can withstand over 30 J/cm² sub aperture input surface fluence. A significant decrease in laser induced damage initiation and growth was observed compared to shadow cones with linear profiles at input fluences higher than 10 J/cm².

Conference Presentation

Citation Download Citation

Allison Browar, Eyal Feigenbaum, Isaac Bass, Jim Vickers, Gabe Guss, and Wren Carr "Development of a novel large damage site mitigation technique", Proc. SPIE 12300, Laser-Induced Damage in Optical Materials 2022, 1230004 (2 December 2022); https://doi.org/10.1117/12.2642467

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