The vacuum effect of femtosecond LIDT measurements on dielectric films

D. N. Nguyen; L. A. Emmert; W. Rudolph; D. Patel; C. S. Menoni

doi:10.1117/12.867996

2 December 2010 The vacuum effect of femtosecond LIDT measurements on dielectric films

D. N. Nguyen, L. A. Emmert, W. Rudolph, D. Patel, C. S. Menoni

Proceedings Volume 7842, Laser-Induced Damage in Optical Materials: 2010; 78420V (2010) https://doi.org/10.1117/12.867996
Event: Laser Damage Symposium XLII: Annual Symposium on Optical Materials for High Power Lasers, 2010, Boulder, Colorado, United States

Abstract

At ~10^-7 Torr, the multiple femtosecond pulse LIDT, F(∞), is about 10% of the single pulse damage fluence for hafnia and silica films compared to ~75% at 630 Torr. The 1-on-1 LIDT is pressure independent. The decrease of F(∞) is related to the water vapor and oxygen content of the ambient gas with the former having the largest effect. The decrease of F(∞) is associated with a change in damage morphology. In air, the damage "crater" starts at the center of the beam and grow in diameter as the fluence increases. In contrast, the damage starts at random "sites" within the exposed area under vacuum. Absorbing centers are created by the removal of oxygen from predisposed sites (for example grain boundaries) on the film surfaces, producing absorbing states.

Citation Download Citation

D. N. Nguyen, L. A. Emmert, W. Rudolph, D. Patel, and C. S. Menoni "The vacuum effect of femtosecond LIDT measurements on dielectric films", Proc. SPIE 7842, Laser-Induced Damage in Optical Materials: 2010, 78420V (2 December 2010); https://doi.org/10.1117/12.867996

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