摘要
The detection accuracy of frequency shift is crucial in microwave detection based on the Rydberg atomic alternating current(AC)Stark shift effect.We design a frequency shifter system that can provide a high-precision frequency reference signal and improve the detection accuracy of frequency shift.This system utilizes acoustic-optic modulators to generate two coupling lights with a fixed frequency interval and completes double Rydberg atomic excitation.The detection accuracy of the AC Stark shift(±1.33 MHz)is 6.08 times better than that of the wavelength meter-reading scheme(±8.09 MHz),and the minimum detectable frequency shift is improved by a factor of 3.13.
基金
supported by the National Natural Science Foundation of China(Nos.52435011,51821003,62103385,and 62175219)
the Joint Funds of the National Natural Science Foundation of China(No.U21A20141)。
