基于非线性光学参量振荡和参量放大过程有效调控光场频率和量子噪声是量子光学领域的重要内容。借助于光学参量振荡和光学参量放大过程中光子对的量子关联可制备压缩态光场，使光场某个正交分量的量子噪声可突破相应标准量子极限。可调谐至铷原子跃迁线的压缩真空态和偏振压缩态光场的制备及表征，为改善铷原子磁强计信噪比和灵敏度开辟了新途径。在本研究组已有的采用非线性光学参量过程制备压缩态光场的实验工作基础上，本项目拟围绕可调谐至铷原子795纳米D1跃迁线的压缩态光场制备及表征，及其在铷原子磁强计中的应用，拟开展以下工作：1)、可调谐至铷原子795纳米D1跃迁线的压缩真空态和偏振压缩态光场的有效制备及其光子量子统计特性表征；2)、研究影响压缩度的物理过程及机制，优化795纳米压缩态光场的压缩度和稳定度；3)、压缩光场应用于铷原子系综自旋检测中的背景噪声抑制研究；4)、探索量子增强型铷原子光学磁强计。

Manipulation of quantum noise characters of light fields using of nonlinear optical parametric oscillator (OPO) and optical parametric amplifier (OPA) is one of the important research fields in quantum optics. Based on quantum correlation between photon pairs from OPO and OPA, the squeezed state light field could be generated, in which the quantum noise level of desired quadrature component could be lower than the corresponding standard quantum limit. Especially the generation and characterization of squeezed-vacuum-state light field and polarization squeezed-state light field tuned to atomic transition lines, providing the new possibility for improving the signal-to-noise ratio and sensitivity of Rubidium atomic magnetometer. Based on our existed experimental works of squeezed-state light field's generation via OPO and OPA, focusing on preparation and characterization of the squeezed-state light fields tuned on 795nm Rubidium D1 transition, and its application for Rubidium atomic magnetometer, the following aspects will be investigated: 1). Preparation and characterization of squeezed-vacuum-state and polarization-squeezed-state light fields tuned to rubidium D1 line at 795nm; 2). Investigation on on physical processes of squeezed-state light generation and the mechanism that influence squeezing, and further optimize squeezing level and stability; 3). Evaluation of the background noise reduction in Rubidium atomic spin detection with 795nm squeezed-state light field; 4). Explore quantum-enhanced rubidium atomic magnetometer by using of the squeezed-state light field.