Journal of Sol-Gel Science and Technology

, Volume 19, Issue 1–3, pp 223–226

Room-Temperature Mirror Preparation Using Sol-Gel Chemistry and Laminar-Flow Coating Technique

  • Philippe Belleville
  • Claude Bonnin
  • Jean-Jacques Priotton
Article

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 42-cm × 46-cm × 9-cm highly-reflective (HR)-coated substrates representing more than 50 m2 of coated area. Prototypes of these dielectric mirrors were prepared with interference quaterwave stacks of SiO2 and ZrO2-PVP (PolyVinylPyrrolidone) thin films starting from sol-gel colloidal suspensions (sols). Low refractive index material 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 FT-IR spectroscopy. A deposition technique so-called “Laminar Flow Coating” (LFC) 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 fulfilling.

sol-gel chemistry mirrored coating composite material room-temperature deposition 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Philippe Belleville
    • 1
  • Claude Bonnin
    • 1
  • Jean-Jacques Priotton
    • 1
  1. 1.CEA-Le RipaultMontsFrance

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