Generation of defects with diamond and silica particles inside high-reflection coatings: influence on the laser damage threshold

Marc Poulingue; Jean DiJon; B. Rafin; Herve Leplan; Michel Ignat

doi:10.1117/12.360096

7 September 1999 Generation of defects with diamond and silica particles inside high-reflection coatings: influence on the laser damage threshold

Marc Poulingue, Jean DiJon, B. Rafin, Herve Leplan, Michel Ignat

Author Affiliations +

Proceedings Volume 3738, Advances in Optical Interference Coatings; (1999) https://doi.org/10.1117/12.360096
Event: Optical Systems Design and Production, 1999, Berlin, Germany

Abstract

High power lasers at 1.06 micrometers wavelength like the French 'Megajoule' program require large area mirrors made of alternative layers of HfO₂ and SiO₂ with high damage threshold. It has ben already identified that nodular defects have a significant role in the activation of laser damage. The purpose of this paper is to study experimentally the role played by the size and the nature of the seed on the critical behavior of the nodular defects under laser irradiation. Artificial nodules have been grown with careful control of location and seed size. these nodules have been generated with diamond and silica seeds. Silica seeds of four different sizes have been used. A method which minimizes clusters of particles has been successfully used. With this method, we have obtained defects with a sharp size distribution. These samples have been tested on our automatic damage test bench in various modes. The thresholds between polluted and unpolluted mirrors are discussed according to the size and the nature of the seeds. The damage sites are observed with a scanning electron microscope. These experimental results are compared with a damage model.

Citation Download Citation

Marc Poulingue, Jean DiJon, B. Rafin, Herve Leplan, and Michel Ignat "Generation of defects with diamond and silica particles inside high-reflection coatings: influence on the laser damage threshold", Proc. SPIE 3738, Advances in Optical Interference Coatings, (7 September 1999); https://doi.org/10.1117/12.360096

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