Chen Zhao-Dan, Yuan Chun-Hua, Ma Hong-Mei, Li Dong, Chen L Q, Ou Z Y, Zhang Weiping
Opt Express. 2016 Aug 8;24(16):17766-78. doi: 10.1364/OE.24.017766.
Collective atomic excitation can be realized by the Raman scattering. Such a photon-atom interface can form an SU(1,1)-typed atom-light hybrid interferometer, where the atomic Raman amplification processes take the place of the beam splitting elements in a traditional Mach-Zehnder interferometer. We numerically calculate the phase sensitivities and the signal-to-noise ratios (SNRs) of this interferometer with the method of homodyne detection and intensity detection, and give their differences of the optimal phase points to realize the best phase sensitivities and the maximal SNRs from these two detection methods. The difference of the effects of loss of light field and atomic decoherence on measure precision is analyzed.
集体原子激发可通过拉曼散射实现。这样的光子 - 原子界面可形成一个SU(1,1)型的原子 - 光混合干涉仪，其中原子拉曼放大过程取代了传统马赫 - 曾德尔干涉仪中的分束元件。我们采用零差检测法和强度检测法对该干涉仪的相位灵敏度和信噪比进行了数值计算，并给出了这两种检测方法在实现最佳相位灵敏度和最大信噪比时最优相位点的差异。分析了光场损耗和原子退相干对测量精度影响的差异。
