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Cavity-enhanced Faraday rotation measurement with auto-balanced photodetection

机译:带自动平衡光电检测的腔增强法拉第旋转测量

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Optical cavity enhancement for a tiny Faraday rotation is demonstrated with auto-balanced photodetection. This configuration is analyzed using the Jones matrix formalism. The resonant rotation signal is amplified, and thus, the angular sensitivity is improved. In the experiment, the air Faraday rotation is measured with an auto-balanced photoreceiver in single-pass and cavity geometries. The result shows that the measured Faraday rotation in the single-pass geometry is enhanced by a factor of 85 in the cavity geometry, and the sensitivity is improved to 7.54 x 10(-10) rad Hz(-1/2), which agrees well with the Jones matrix analysis. With this verification, we propose an AC magnetic sensor whose magnetic sensitivity is expected to achieve 10 pT Hz(-1/2). (C) 2015 Optical Society of America
机译:自动平衡的光电检测证明了法拉第旋转的光学腔增强。使用琼斯矩阵形式主义分析此配置。共振旋转信号被放大,因此,角灵敏度提高。在实验中,法拉第旋转空气是通过自动平衡的光接收器以单通道和腔体几何形状进行测量的。结果表明,在单通几何中,法拉第旋转的测量值在腔几何中提高了85倍,并且灵敏度提高到7.54 x 10(-10)rad Hz(-1/2),这表明琼斯矩阵分析效果很好。通过此验证,我们提出了一种交流磁传感器,其磁灵敏度有望达到10 pT Hz(-1/2)。 (C)2015年美国眼镜学会

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