基于调制射频场电磁诱导透明光谱的工频电场测量

Power Frequency Electric Field Measurement Based on Electromagnetic Induced Transparent Spectrum under Radio Frequency Field

利用双光子(852 nm和509 nm)激发方式实现了铯原子53S_(1/2)里德堡态制备,并研究了射频电场导致的交流斯塔克效应作用下53S1/2里德堡原子的电磁诱导透明光谱。通过改变射频电场幅度,得到了电磁诱导透明光谱斯塔克频移与电场幅度的关系。实验中将工频电场幅度调制到射频电场,实现了工频电场场强的可溯源测量,场强灵敏度达到0.37 V/cm,测量动态范围为37.2 dB。同时获得了工频电场频率的精确测量,频率测量的不确定度优于0.1%。

The two-photon(852 nm and 509 nm)excitation was used to achieve the preparation of the 53 S1/2 Rydberg state of cesium atoms.The electromagnetically induced transparency spectrum of Rydberg atoms in which the radio frequency electric fields in the AC Stark effect was studied.By changing the amplitude of the radio frequency electric fields,the dependance of the Stark frequency shift of Rydberg atoms on the amplitude of the electric field was investigated.In the experiments,the power frequency electric fields were modulated to the radio frequency electric fields.The traceable measurement of the field strength of the power frequency electric field was realized.The field strength sensitivity can reach 0.37 V/cm,and the amplitude measurement dynamic range can reaches 37.2 dB.Moreover,the frequency measurement of power frequency electric fields is demonstrated,and the uncertainty of frequency measurement is smaller than 0.1%.