Functional damage thresholds of hafnia/silica coating designs for the NIF laser

Jason Taniguchi; Nelson E. LeBarron; Jim Howe; Douglas J. Smith; Christopher J. Stolz; Carolyn L. Weinzapfel; James F. Kimmons

doi:10.1117/12.425071

12 April 2001 Functional damage thresholds of hafnia/silica coating designs for the NIF laser

Jason Taniguchi, Nelson E. LeBarron, Jim Howe, Douglas J. Smith, Christopher J. Stolz, Carolyn L. Weinzapfel, James F. Kimmons

Author Affiliations +

Proceedings Volume 4347, Laser-Induced Damage in Optical Materials: 2000; (2001) https://doi.org/10.1117/12.425071
Event: Laser-Induced Damage in Optical Materials: 2000, 2000, Boulder, CO, United States

Abstract

Studies into the functional damage thresholds of hafnia/silica thin film coatings for the NIF laser have been conducted on two different-sized substrates: 50-mm-diam test substrates and full-sized (412 x 412 mm) NIF mirror substrates. For both studies, the optics were raster scanned by Q-switched Nd:YAG lasers emitting 1064-nm light with 10- ns pulse lengths. The coatings tested were primarily high reflectors, although polarizing beam splitter and anti- reflective thin films were tested on the small substrates. Tests were performed to find the functional damage threshold: the minimum fluence at which a damaged optic degrades the performance of the NIF laser, or, experimentally, the minimum fluence at which a damaged site begins to grow. Thus, the concern is with finding not only the fluence that caused a pit (for example) but also the fluence at which that pit begins to grow with subsequent laser shots. After a site begins a growth phase, the growth rate is measured as a function of fluence. This provides some information for predicting the optic lifetime for given operating limits of the laser.

Citation Download Citation

Jason Taniguchi, Nelson E. LeBarron, Jim Howe, Douglas J. Smith, Christopher J. Stolz, Carolyn L. Weinzapfel, and James F. Kimmons "Functional damage thresholds of hafnia/silica coating designs for the NIF laser", Proc. SPIE 4347, Laser-Induced Damage in Optical Materials: 2000, (12 April 2001); https://doi.org/10.1117/12.425071

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