40-fs broadband low dispersion mirror thin film damage competition

Raluca A. Negres; Christopher J. Stolz; Kyle R. P. Kafka; Enam A. Chowdhury; Matt Kirchner; Kevin Shea; Meaghan Daly

doi:10.1117/12.2244758

6 December 2016 40-fs broadband low dispersion mirror thin film damage competition

Raluca A. Negres, Christopher J. Stolz, Kyle R. P. Kafka, Enam A. Chowdhury, Matt Kirchner, Kevin Shea, Meaghan Daly

Proceedings Volume 10014, Laser-Induced Damage in Optical Materials 2016; 100140E (2016) https://doi.org/10.1117/12.2244758
Event: SPIE Laser Damage, 2016, Boulder, Colorado, United States

Abstract

This broadband, low dispersion mirror damage competition is a continuation of last year's test with 150 ps pulse length results published in 2015 and 40 fs pulse length results in this study. This competition allows a direct laser resistance comparison between pulse durations because the samples were laser damage tested under identical conditions. The requirements of the coatings are a minimum reflection of 99.5% at 45 degrees incidence angle at "P" polarization with a Group Delay Dispersion (GDD) of < ± 100 fs² over a spectral range of 773 nm ± 50 nm. The choice of coating materials, design, and deposition method were left to the participant. Laser damage testing was performed using the raster scan method with a 40 fs pulse length on a single testing facility to enable a direct comparison among the participants. GDD measurements were performed to validate specification compliance. A double blind test assured sample and submitter anonymity. In addition to the laser resistance results and GDD measurements, details of the deposition processes, cleaning method, coating materials and layer count are also shared.

Citation Download Citation

Raluca A. Negres, Christopher J. Stolz, Kyle R. P. Kafka, Enam A. Chowdhury, Matt Kirchner, Kevin Shea, and Meaghan Daly "40-fs broadband low dispersion mirror thin film damage competition", Proc. SPIE 10014, Laser-Induced Damage in Optical Materials 2016, 100140E (6 December 2016); https://doi.org/10.1117/12.2244758

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