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Proceedings Paper

150-ps broadband low dispersion mirror thin film damage competition
Author(s): Christopher J. Stolz; Raluca A. Negres; Kyle Kafka; Enam Chowdhury; Matt Kirchner; Kevin Shea; Meaghan Daly
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Paper Abstract

Broadband low dispersion mirrors are fluence-limiting and pulse-shape-limiting components in short pulse lasers. To better understand the current technology state of broadband low dispersion mirrors, a laser damage competition was held at the 2015 Laser Damage Conference. Participants were asked to submit mirrors that met a minimum reflection of 99.5% at 45 degrees incidence angle at “P” polarization with a Group Dispersion Delay (GDD) of <± 100 fs2 over a spectral range of 773 nm ± 50 nm. The participants selected the coating materials, design, and deposition method. Laser damage testing was performed using the raster scan method with a 150 ps pulse length on a single testing facility to enable a direct comparison among the participants. GDD measurements were performed to validate specification compliance. Unfortunately nearly half of the submitted samples were found to not meet the GDD specifications. Details of the deposition processes, cleaning method, coating materials, and layer count are also shared.

Paper Details

Date Published: 23 November 2015
PDF: 8 pages
Proc. SPIE 9632, Laser-Induced Damage in Optical Materials: 2015, 96320C (23 November 2015); doi: 10.1117/12.2195592
Show Author Affiliations
Christopher J. Stolz, Lawrence Livermore National Lab. (United States)
Raluca A. Negres, Lawrence Livermore National Lab. (United States)
Kyle Kafka, The Ohio State Univ. (United States)
Enam Chowdhury, The Ohio State Univ. (United States)
Matt Kirchner, Kapteyn-Murnane Labs., Inc. (United States)
Kevin Shea, Kapteyn-Murnane Labs., Inc. (United States)
Meaghan Daly, Kapteyn-Murnane Labs., Inc. (United States)


Published in SPIE Proceedings Vol. 9632:
Laser-Induced Damage in Optical Materials: 2015
Gregory J. Exarhos; Vitaly E. Gruzdev; Joseph A. Menapace; Detlev Ristau; MJ Soileau, Editor(s)

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