Frequency tripling mirror.
Frequency tripling mirror.
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三倍频镜。
DOI：
10.1364/oe.23.031594
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发表时间：
2015
期刊：
影响因子：
3.8
通讯作者：
W. Rudolph
中科院分区：
文献类型：
--
作者：
C. Rodriguez;S. Günster;D. Ristau;W. Rudolph
设计、制作并演示了一种三倍频反射镜。该反射镜由熔融二氧化硅衬底上的金属氧化层的非周期性序列组成，该衬底被量身定做以在反射中产生三次谐波。优化的25层结构预计将使反射的TH比单一的Hafnia层增加5个数量级以上，这是TH和基波的相位失配的全局补偿的结果，场增强和有利于反射的设计。在近红外、脉宽为55ps的基波波长下，用25层叠层获得了接近1%的单脉冲转换效率。FTM可扩展到更高的转换、更大的带宽和其他波长区域，使其成为一种基于光学干涉涂层的有吸引力的新型非线性光学元件。
A frequency tripling mirror (FTM) is designed, fabricated and demonstrated. The mirror consists of an aperiodic sequence of metal oxide layers on a fused silica substrate tailored to produce the third harmonic in reflection. An optimized 25-layer structure is predicted to increase the reflected TH by more than five orders of magnitude compared to a single hafnia layer, which is a result of global compensation of the phase mismatch of TH and fundamental, field enhancement and design favoring reflection. Single pulse conversion efficiencies approaching one percent have been observed with the 25-layer stack for fundamental wavelengths in the near infrared and 55 fs pulse duration. The FTM is scalable to higher conversion, larger bandwidths and other wavelength regions making it an attractive novel nonlinear optical component based on optical interference coatings.