Comparing femtosecond laser damage in silica/hafnia nanolaminates and mixed material coatings for high-power laser optics

Emma DeAngelis; Mohamed Yaseen Noor; Maxwell Weiss; Conrad Kuz; Carmen Menoni; Enam Chowdhury

doi:10.1117/12.3030814

18 December 2024 Comparing femtosecond laser damage in silica/hafnia nanolaminates and mixed material coatings for high-power laser optics

Emma DeAngelis, Mohamed Yaseen Noor, Maxwell Weiss, Conrad Kuz, Carmen Menoni, Enam Chowdhury

Author Affiliations +

Proceedings Volume PC13190, Laser-Induced Damage in Optical Materials 2024; PC131900U (2024) https://doi.org/10.1117/12.3030814
Event: SPIE Laser Damage, 2024, San Ramon, CA, United States

Conference Poster

Abstract

As the demands of high repetition rate, high intensity laser applications rise, robust interference coatings are needed that can balance the conflicting requirements of a strong laser damage threshold, high reflectivity/transmissivity, and low group delay dispersion. Two layer anti-reflection coatings (Air/SiO2/HfSiO/substrate vs Air/SiO2/Hf-SiO2 nanolaminates/substrate) were tested with p-polarized, 77-fs 1030-nm laser pulses. Both coatings had identical refractive index at 1030-nm for the high index layers, but one coating contained a ~200-nm thick layer of mixed HfO2 and SiO2, while the other had a nanolaminate featuring 25 pairs of <5-nm HfO2 and SiO2 layers. Nanolaminate performance under femtosecond irradiation is relatively unexplored; this work aims to address that, and shows the damage threshold fluence of the nanolaminate sample was ~2/3 of that of the mixed layer sample. These results set the stage for developing stronger nanolaminates for femtosecond pulses.

Citation Download Citation

Emma DeAngelis, Mohamed Yaseen Noor, Maxwell Weiss, Conrad Kuz, Carmen Menoni, and Enam Chowdhury "Comparing femtosecond laser damage in silica/hafnia nanolaminates and mixed material coatings for high-power laser optics", Proc. SPIE PC13190, Laser-Induced Damage in Optical Materials 2024, PC131900U (18 December 2024); https://doi.org/10.1117/12.3030814

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