Title :
A magnetometer based on coherent population beating
Author :
Li Liu ; Yigen Wang ; Xiaona Zhao ; Yuxin Zhuang ; Zhong Wang
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing, China
Abstract :
We proposed a novel magnetic field measurement method extended from the CPT method. It is based on the coherent population beating (CPB) phenomenon. CPB occurs in a typical three-level system, when the frequency difference of the two pump laser fields have a detuning from the ground states splitting, and the CPB oscillation frequency is equal to the detuning. We are able to detect the beat frequency shift with the external magnetic field changing via digital processing, thus we can acquire the Zeeman frequency shift and then calculate external magnetic field intensity accurately.
Keywords :
frequency measurement; magnetic field measurement; magnetic sensors; magnetometers; CPB oscillation frequency; CPT method; Zeeman frequency shift; beat frequency shift detection; coherent population beating phenomenon; digital processing; ground state splitting; magnetic field measurement method; magnetometer; pump laser; three-level system; Frequency measurement; Magnetic field measurement; Magnetic fields; Magnetometers; Oscillators; Sociology; Statistics; CPB; CPT; equal-precision measurement; magnetometer;
Conference_Titel :
Frequency Control Symposium & the European Frequency and Time Forum (FCS), 2015 Joint Conference of the IEEE International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4799-8865-5
DOI :
10.1109/FCS.2015.7138848
