1077-nm, CW mirror thin film damage competition

Raluca A. Negres; Christopher J. Stolz; Sage B. DeFrances; David M. Bernot; Joseph A. Randi; Jeffrey G. Thomas

doi:10.1117/12.2641371

2 December 2022 1077-nm, CW mirror thin film damage competition

Raluca A. Negres, Christopher J. Stolz, Sage B. DeFrances, David M. Bernot, Joseph A. Randi, Jeffrey G. Thomas

Proceedings Volume 12300, Laser-Induced Damage in Optical Materials 2022; 1230002 (2022) https://doi.org/10.1117/12.2641371
Event: SPIE Laser Damage, 2022, Rochester, New York, United States

Abstract

This year’s competition proposed to survey the damage resistance of near-IR high reflectors designed for continuous-wave (CW) laser applications. The requirements for the coatings were a minimum reflection of 99.5% at normal incidence for 1077-nm light. The participants in this effort selected the coating materials, coating design, and deposition method. Samples were damage tested at a single testing facility using a kW fiber laser source capable of delivering up to 10 MW/cm² peak irradiance on target. A double blind test assured sample and submitter anonymity. The damage performance results, sample rankings, details of the deposition processes, coating materials and substrate cleaning methods are shared. We found that multilayer coatings using tantala or hafnia as high index materials were top performers under CW laser exposure within several coating deposition groups. Namely, dense coatings by ion-beam sputtering (IBS), plasma-enhanced atomic layer deposition (PEALD) and magnetron sputtering (MS) exhibited the lowest absorption & temperature rise upon CW laser irradiation without damage onset up to the maximum power density level available in this study.

Conference Presentation

Citation Download Citation

Raluca A. Negres, Christopher J. Stolz, Sage B. DeFrances, David M. Bernot, Joseph A. Randi, and Jeffrey G. Thomas "1077-nm, CW mirror thin film damage competition", Proc. SPIE 12300, Laser-Induced Damage in Optical Materials 2022, 1230002 (2 December 2022); https://doi.org/10.1117/12.2641371

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available