Share Email Print

Proceedings Paper

Laser cavity mirror preparation using sol-gel chemistry and laminar-flow coating technique
Author(s): Philippe F. Belleville; Philippe M. Pegon
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The CEA/DAM megajoule-class pulsed Nd:glass laser devoted to Inertial Confinement Fusion (ICF) research will require 240 cavity-end mirrors. The approved laser design necessitates 44cm X 44cm X 6cm highly-reflective (HR)-coated substrates representing more than 50m2 of coated area. Prototypes of these dielectric mirrors were prepared with interference quarterwave stacks of SiO2 and ZrO2-PVP thin films starting from sol-gel colloidal suspensions. Low reflective index materials was based on nanosized silica particles and high refractive index coating solution was made of a composite system. The colloidal/polymeric ratio in the composite system has been optimized regarding refractive index value, laser damage threshold and chemical interactions have been studied using FTIR spectroscopy. A promising deposition technique so-called 'Laminar Flow Coating' has been associated to sol-gel chemistry for HR laser damage-resistant sol-gel coating development. This novel coating method confirmed its main advantages compared to dipping or spinning processes: coating large flat square substrates at room temperature with small solution consumption, good thickness uniformity, weak edge-effects, induced stress-free coating, good optical properties and laser damage resistance.

Paper Details

Date Published: 23 July 1999
PDF: 10 pages
Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); doi: 10.1117/12.354240
Show Author Affiliations
Philippe F. Belleville, Ctr. d'Etudes de Limeil-Valenton/CEA (France)
Philippe M. Pegon, REOSC (France)

Published in SPIE Proceedings Vol. 3492:
Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion
W. Howard Lowdermilk, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?