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Femtosecond laser damage in dielectric coatings
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2001
Year
Optical MaterialsEngineeringLaser PhysicsLaser ApplicationsLaser AblationHigh-power LasersLaser ControlLaser OpticsAblation BehaviorLaser Micro-processingOptical PropertiesPulse DurationMulti-shot InvestigationsLaser ManufacturingMaterials SciencePhotonicsFemtosecond Laser DamageLaser Processing TechnologyLaser DesignLaser-assisted DepositionAdvanced Laser ProcessingLaser-induced BreakdownApplied PhysicsLaser SafetyLaser-surface InteractionsLaser Damage
Multi-shot investigations of Ti:sapphire laser (wavelength (lambda) approximately equals 800 nm) induced damage were performed in three different laboratories (BAM, Berlin; LZH, Hannover; UNM, Albuquerque). The ablation behavior of a high reflecting mirror consisting of alternating (lambda) /4- layers of Ta<SUB>2</SUB>O<SUB>5</SUB> and SiO<SUB>2</SUB> was studied. Fused silica served as substrate. The influence of the pulse duration ((tau) equals 13 - 130 fs), the pulse number (30 - (infinity) ) and the repetition rate (10 Hz - 100 MHz) on the damage threshold will be discussed.