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High-finesse Fabry-Perot electro-optic sensors with enhanced sensitivity and high spatial resolution

机译:高灵敏度的Fabry-Perot电光传感器,具有增强的灵敏度和高空间分辨率

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摘要

We present a high-finesse optical cavity containing a LiTaO_(3) electro-optic crystal, devoted to free-space electric field characterization. Theoretical considerations will show that the modulation depth is directly related to the transversal components of the field to be measured, thus opening the way to vectorial mapping of the electric field using a single electro-optic crystal. Also, a discussion about noise and sensitivity will be given. As the latter increases with the effective cavity length, and bandwidth decreases, a trade-off is realized, allowing us to measure an electric field of 60 mV/m/(Hz)~(1/2) in a 110 MHz bandwidth. Cavity dimensions are less than 8 mm~(3), giving an inner-crystal transverse spatial resolution of 70 (mu)m and allowing pigtailed systems to integrate.
机译:我们提出了一个包含LiTaO_(3)电光晶体的高级光学腔,该腔专门用于自由空间电场表征。理论上的考虑将表明,调制深度与要测量的场的横向分量直接相关,从而为使用单个电光晶体进行电场矢量映射开辟了道路。另外,将给出关于噪声和灵敏度的讨论。随着后者随着有效腔体长度的增加而增加,带宽减小,就实现了折衷,使我们能够在110 MHz带宽下测量60 mV / m /(Hz)〜(1/2)的电场。腔体尺寸小于8 mm〜(3),内部晶体的横向空间分辨率为70μm,并且可以集成尾纤系统。

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