摘要
脉冲式冷原子干涉仪应用在惯性量测量领域已有数十年的历史。一般来说,人们通过原子在空间中的运动轨迹来确定原子在不同路径下所积累的相位差,结合激光本身所携带的相位最终得到原子干涉仪输出相位的表达式,并最终给出探测信号与所测量惯性参量的关系式。但在干涉仪处在动态情况下时,这种计算方式并不能很方便地给出解算表达式。提出一种对脉冲式冷原子干涉仪敏感惯性参量物理机制的新理解,通过研究转动后原子-光子Raman作用的失谐变化率,可以很方便地给出动态情形下干涉仪输出相位的解析形式,这显著推进了冷原子干涉仪在复杂动态情形下的应用。
The Mach-Zehnder type atomic interferometer has been used in the field of inertial sensing for decades.Typically,the phase difference accumulated by the atom in different paths is determined by the motion trajectory of the atom in space.With the knowledge of the laser phase,the expression of the atomic interferometer output phase is finally obtained,the relationship between the detection signal and the measured inertial parameters is finally given.However,this explanation can not conveniently provides the analytical expressions when the system is outside the laboratory.In this paper,an explicit physical mechanism of the inertial sensing in Mach-Zehnder type atomic interferometer is revealed.The detuning change rate of the atom-photon Raman transition is responsible for the phase accumulated under rotation.With this new mechanism,the analytical relation between the output signal and the inertial parameters could be easily given,which significantly improves the application of the atomic interferometer in dynamic situations.
作者
黄晨
乐旭广
程俊
姚辉彬
毛海岑
HUANG Chen;YUE Xu-guang;CHENG Jun;YAO Hui-bin;MAO Hai-cen(Huazhong Institute of Electro-Optics,Wuhan National Laboratory for Optoelectronics,Wuhan 430223)
出处
《导航与控制》
2021年第6期77-84,76,共9页
Navigation and Control
关键词
冷原子干涉仪
惯性参量
物理机制
动态应用
cold-atom interferometer
inertial parameter
physical mechanism
dynamic application
