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Femtosecond damage resistance of femtosecond multilayer and hybrid mirrors

机译:飞秒多层镜和混合镜的飞秒破坏抵抗力

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摘要

Improving the laser-induced damage threshold of optical components is a basic endeavor in femtosecond technology. By testing more than 30 different femtosecond mirrors with 42 fs laser pulses at 1 kHz repetition rate, we found that a combination of high-bandgap dielectric materials and improved design and coating techniques enable femtosecond multilayer damage thresholds exceeding 2 J/cm(2) in some cases. A significant x2.5 improvement in damage resistance can also be achieved for hybrid Ag-multilayer mirrors exhibiting more than 1 J/cm(2) threshold with a clear anticorrelation between damage resistance and peak field strength in the stack. Slight dependence on femtosecond pulse length and substantial decrease for high (megahertz) repetition rates are also observed. (C) 2016 Optical Society of America
机译:飞秒技术中的一项基本工作就是提高激光对光学组件的损坏阈值。通过以1 kHz的重复频率用42 fs的激光脉冲测试30多个不同的飞秒反射镜,我们发现高禁带电介质材料与改进的设计和涂层技术的结合使飞秒多层损伤阈值超过2 J / cm(2)。一些案例。对于显示超过1 J / cm(2)阈值的混合Ag多层反射镜,在堆叠中的抗破坏性与峰值场强之间也具有明显的反相关性,也可以实现抗破坏性的x2.5显着提高。还观察到了对飞秒脉冲长度的轻微依赖,以及高(兆赫兹)重复频率的大幅下降。 (C)2016美国眼镜学会

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