基于光与原子量子关联的高精度角速度测量实验研究

基于Sagnac效应的角速度测量系统在军事和国民经济领域中有重要用途。然而，随着需求的提升，不论是光纤还是原子陀螺，其精度、稳定性、成本等逐渐无法满足。结合光易于传播和原子长相干的光-原子混合陀螺仪成为新的发展方向之一。然而，光-原子混合陀螺目前的精度受非线性相互作用效率和诸多噪声的影响，仍然无法满足实际应用。因此，进一步优化光-原子相互作用，抑制噪声成为了突破传统陀螺仪技术瓶颈的关键。本项目针对这些问题，拟开展包括：1.结合相干反馈和模式操控，实现高增益的光和原子量子关联，放大信号，抵抗损耗；2.利用原子相干性抑制光纤线圈中的非线性噪声对陀螺仪精度的影响；3.利用光-原子相互作用的窄线宽特性，实现双系统差分测量，消除环境中随机抖动的影响。本项目预期成果将进一步推动光-原子混合陀螺研究，为新型陀螺仪的构建提供新原理和新技术，开拓量子关联在精密测量中的新应用。

Rotation sensing based on Sagnac effect has significant application in the military and national economy. As the most commonly used gyroscope, the fiber optic gyroscope and atomic gyroscope need to be further optimized, such as improving accuracy, stability and reducing cost. Combining the advantages of light and atoms, the atom-light hybrid gyroscope becomes one of the research highlights whose potential performance is superior to the two gyroscopes. However, the accuracy of the hybrid gyroscope has no advantage at present due to the influence of nonlinear interaction efficiency and noises. Therefore, it is necessary to further optimize the interaction between light and atom, as well as suppress the noise. In order to solve these problems, our proposal is to be carried out: 1. Combining the coherent feedback and mode manipulation method, we can achieve strong quantum correlation between light and atom which can amplify signal and resist loss. 2. By the advantage of the atomic coherence, we can suppress the influence of nonlinear noise in fiber coil and increase rotation measurement accuracy. 3. Based on the narrow linewidth of the light-atom interaction, a differential measurement system is employed to eliminate the influence of random jitter induced by environment. The expected results of this project will further promote the research of atom-light hybrid quantum gyroscope, provide new technologies for the gyroscope, and open up new applications of quantum correlation in metrology.