Review of high frequency modulation vector atomic magnetometers
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TH89

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    Abstract:

    The objective of reducing 1 / f noise and achieving vectorized measurements by applying a modulation field is frequently used in atomic magnetometers. According to the relative magnitude of the modulation field frequency and relaxation rate, modulation atomic magnetometer (AM) can be divided into two categories, which are low frequency modulation AM and high frequency modulation AM. In this article, we summarize and classify high frequency modulation atomic magnetometers into two categories. The first is parallel modulation and the other is perpendicular modulation according to the relative position between the direction of the modulation field and that of the pump beam. Furthermore, seven different configurations are listed according to the main field direction, among which four configurations are analyzed in detail, namely perpendicular modulation X mode, perpendicular modulation zero-field mode, parallel modulation Z mode and parallel modulation zero-field mode. The measurement models for these four configurations are derived from the Bloch equation. In addition to combing and validating the theoretical analysis of the existing literature, we also obtain some measurement models that are not mentioned in the existing literatures. Numerical simulation is implemented by MATLAB Simulink module, which evaluates the rationality of some simplifications during analytical model derivation. Finally, a general Simulink model of Bloch equation is given, which can be used for numerical simulation of atomic magnetometers with different configurations.

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  • Received:
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  • Online: July 07,2023
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