LASER-INDUCED THERMAL DAMAGE OF COPPER REFLECTION M IRRORS

A physical model for laser-induced thermal damage of optical surfaces has been developed and used to study damage thresholds, cooling and accumulative effects The computed dependence of damage thresholds on laser pulse duration is in agreement with experimental and theoritical results reasonably. A concept about critical cooling thickness of mirrors has been suggested , and a scaling law of multi-pulse accumulative effects has been obtained.