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12 October 2021 Development of large area input “shadowers” with intricate geometries for growth-suppression of exit surface damage on fused silica
Eyal Feigenbaum, Isaac Bass, James L. Vickers, Gabe Guss, Wren Carr
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Proceedings Volume 11910, Laser-Induced Damage in Optical Materials 2021; 119100J (2021) https://doi.org/10.1117/12.2600480
Event: SPIE Laser Damage, 2021, Online Only
Abstract
We present the development of large aperture fabricated input surface sites (~1-2 mm size) designed to “shadow” damage sites on the exit surface and arrest their further growth. The inherent expanding wave which leads to exit surface damage, motivates our diversion from a conic shape and development of more intricate geometries. We discuss the design considerations, the fabrication and resulting geometries, the optical modeling of light propagation through these geometries, the imaging of the shadowed region as well as the damage-inducing expanding wave intensification they lead to, and the large beam damage testing and their analysis.
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Eyal Feigenbaum, Isaac Bass, James L. Vickers, Gabe Guss, and Wren Carr "Development of large area input “shadowers” with intricate geometries for growth-suppression of exit surface damage on fused silica", Proc. SPIE 11910, Laser-Induced Damage in Optical Materials 2021, 119100J (12 October 2021); https://doi.org/10.1117/12.2600480
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KEYWORDS
Silica
Optics manufacturing
Laser induced damage
Amplifiers
Optical fabrication
Laser damage threshold
National Ignition Facility
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