Large area laser conditioning of dielectiic thin film mirrors

M. R. Kozlowski

doi:10.1117/12.2294446

1 November 1990 Large area laser conditioning of dielectiic thin film mirrors

M. R. Kozlowski

Proceedings Volume 1438, Laser-Induced Damage in Optical Materials 1989; 143811 (1990) https://doi.org/10.1117/12.2294446
Event: Laser-Induced Damage in Optical Materials 1989, 1989, Boulder, CO, United States

Abstract

The laser conditioning of dielectric thin film HR coatings has been studied as a practical method for the improvement of the damage thresholds of large area ( 1.1 m dia.) high power 1064 nm laser mirrors on the LLNL 120 kJ, 100 TW Nova laser system. Both Hf02/Si02 and ZrOJSiO2HR coatings were conditioned by rastering with a small (-0.2 mm) diameter beam from a pulsed (18 Hz, 8 ns) Nd-YAG laser (1064 nm), The samples were rastered at various fluences below the unconditioned damage threshold and subsequently damage tested. Large area conditioning studies were also performed using a large aperture beam of the Nova laser. The laser conditioning effect was found to be permanent. Improvements in damage threshold due to conditioning were as high as a factor of 2.7 and were dependent on the conditioning parameters. A model for the conditioning effect is proposed based on the emptying of electronic defect levels within the bandgap of the dielectric materials.

Citation Download Citation

M. R. Kozlowski "Large area laser conditioning of dielectiic thin film mirrors", Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 143811 (1 November 1990); https://doi.org/10.1117/12.2294446

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