在国际单位制（SI）迈进量子化时代的背景下，建立可直接溯源至SI基本量的精密测量体系，是探索新物理机制和提高测量精度的重要基础和必要手段。本项目采取相干布居囚禁和拉比共振谱结合的原创性方案，通过相位调制微波场破坏原子暗态，解决将拉比共振谱直接移植至光频段的科学技术难点，开展直接溯源至原子共振频率的量子化光强精密测量新方法的研究。项目主要研究包括囚禁在暗态原子与相位调制微波场相互作用的物理机理；微波和光场的拉比频率的相位相干关系研究；光频段拉比共振谱的展宽和频移机制分析；原子气室的参数结构优化设计。预期构建利用拉比共振谱对光强进行精密测量的实验系统，实现量子光强精密测量新方法。并进一步对实验系统进行闭环锁定，为下一代量子计量标准的建立奠定理论和实验基础。

The conventional optical intensity measurement are generally based on thermocouple effect, which is not direct International System of Units (SI) traceable. To exploring novel physical principles and improving measurement accuracy, we should develop the direct SI traceable technique which could associate the measurement value via the SI units. This project intends to combine coherent population trapping with Rabi resonance technique to realize a SI traceable optical power precision measurement. Through the interaction between the atoms trapped in the dark state and the phase-modulated microwave field, the Rabi frequency of light field could be associated with the microwave field, then we could obtain easily the optical power by plot the Rabi resonance lineshape of microwave field. A detailed characterization of the experimental parameters will be also performed in this project. With locking the experimental system, the system holds potential to develop the SI traceable atomic optical power standard in the future, and would be widely applied in the field of precision measurement physics.