Csajbók Viktória, Bedőházi Zsolt, Nagy Benedek J, Dombi Péter
Appl Opt. 2018 Jan 10;57(2):340-343. doi: 10.1364/AO.57.000340.
Laser-induced damage threshold is a fundamental figure of merit of femtosecond optical components used in large-scale laser systems. We tested a series of ultrafast mirrors featuring high band-gap dielectric materials as well as improved design and coating techniques. In a broad range of the damage test pulse train involving between 10 and 100,000 pulses (40 fs, 800 nm), pure dielectric high reflectors exhibit around 1.5 J/cm and hybrid Ag-multilayer mirrors can exhibit well above 1.2 J/cm damage threshold. In addition, a reference antireflection coating exceeded 2 J/cm. Damage threshold dependence on the number of pulses was similar for all optics involved.
激光诱导损伤阈值是大型激光系统中使用的飞秒光学元件的一个基本品质因数。我们测试了一系列采用高带隙介电材料以及改进的设计和镀膜技术的超快反射镜。在包含10至100000个脉冲（40飞秒，800纳米）的广泛损伤测试脉冲序列中，纯介电高反射镜的损伤阈值约为1.5 J/cm²，而混合银多层反射镜的损伤阈值可远高于1.2 J/cm²。此外，一种参考增透膜的损伤阈值超过2 J/cm²。所有相关光学元件的损伤阈值对脉冲数的依赖性相似。
