Polarization Sagnac interferometer with a common-path local oscillator for heterodyne detection
Polarization Sagnac interferometer with a common-path local oscillator for heterodyne detection
复制标题
具有用于外差检测的共路径本地振荡器的偏振萨纳克干涉仪
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
R. Byer
中科院分区：
文献类型：
--
作者：
P. Beyersdorf;M. Fejer;R. Byer
本文描述了一种自由空间共路偏振Sagnac干涉仪。偏振Sagnac干涉仪以对称的方式使用，在干涉的暗条纹上进行检测，以避免使用高功率照明时光电检测器饱和。通过调制从干涉仪反射的载波场，我们产生用于信号场的外差检测的本振。我们计算了光学元件失调和不完美的偏振对散粒噪声限制的干涉仪的灵敏度的影响。实验验证了2米臂长的桌面偏振Sagnac干涉仪的预测。
We describe a free-space common-path polarization Sagnac interferometer. The polarization Sagnac interferometer is used in a symmetric fashion with detection on the dark fringe of the interference to avoid photodetector saturation when high-powered illumination is used. By modulating the carrier field that is reflected from the interferometer, we generate a local oscillator for heterodyne detection of the signal field. We calculate the effect of optical element misalignments and imperfect polarization on the shot-noise–limited sensitivity of the interferometer. The predictions are experimentally verified with a 2-m arm-length tabletop polarization Sagnac interferometer.