Multiple-pulse damage of BK-7 glass

Kunio Yoshida; Hiroshi Yoshida; T. Noda; Sadao Nakai

doi:10.1117/12.57238

1 June 1991 Multiple-pulse damage of BK-7 glass

Kunio Yoshida, Hiroshi Yoshida, T. Noda, Sadao Nakai

Author Affiliations +

Proceedings Volume 1441, Laser-Induced Damage in Optical Materials: 1990; (1991) https://doi.org/10.1117/12.57238
Event: Laser-Induced Damage in Optical Materials: 1990, 1990, Boulder, CO, United States

Abstract

High-power glass laser systems for laser fusion use many BK-i glasses and the laser-induced damage of this glass is a serious problem. Since the BK-i glass is generally melted in platinum (Pt) crucibles the laser damage due to metallic Pt particles occurs inside the glass. The Pt particles cause fractures when irradiated at a fluence higher than 3 J/cm with 1064 nm 15 ns laser pulse. The size of the fracture increases with irradiation fluence and the damaged glass has to be replaced. In special cases BK-i glass is melted in ceramic crucibles but there is a problem of cristobalite production inside the BK-i glass. The laser damage threshold of cristobalite is about 4. 5-5. 5 JIcm with 1064 nni 15 ns laser pulse. We have found average damaged particles in BK-i glasses melted in Pt and ceramic crucibles to be 200-400 and 10 particles per liter respectively. At present laser damage in BK-i glass is being improved by changing a composition ratio of melting materials.

Citation Download Citation

Kunio Yoshida, Hiroshi Yoshida, T. Noda, and Sadao Nakai "Multiple-pulse damage of BK-7 glass", Proc. SPIE 1441, Laser-Induced Damage in Optical Materials: 1990, (1 June 1991); https://doi.org/10.1117/12.57238

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