VCSEL frequency stabilization research for dual-cell Cs optical pumping magnetometer
In the field of geomagnetic measurement,self-exciting dual-cell optical pumping magnetometers have become an important technology for their fast response and high accuracy.Among them,self-exciting dual-cell optical pumping magnetometers excludes phase-shifting circuits,and has simple circuit.The laser frequency stabilization method included a laser temperature control circuit,a feedback circuit,and a laser current source modulation and con-trol circuit.The study applied the frequency stabilization method of injection current modulation to the dual-cell opti-cal pump magnetometer structure.The proposed method reduces the power consumption and volume,with the tempera-ture control accuracy of±0.002 ℃ and the wavelength stability of 4.36x 10-10within 10 seconds.The research ex-plores the possibility of integrating and miniaturizing self-exciting dual-cell optical pumping magnetometers.
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