Floquet description of Optically Pumped Magnetometers

Abstract

We present theoretical description of Voigt and Faraday effect based optically pumped magnetometers using the Floquet expansion. Our analysis describes the spin-operator dynamics of the first, $\hat{F}(t)$, and second, ${\hat{F}}^2(t)$, order moments and takes into account of different pumping profiles and decoherence effects. We find that the theoretical results are in good agreement with the experimental demonstrations over a wide range of fields and pumping conditions. Finally, the theoretical analysis presented here is generalized and can be extended to different magnetometry schemes with arbitrary pumping profiles and multiple radio-frequency fields.

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• Optical Magnetometer Array for Fetal Magnetocardiography
• Theory of double resonance magnetometers based on atomic alignment
• Orientational Effects on the Amplitude and Phase of Polarimeter Signals in Double Resonance Atomic Magnetometry
• Harmonic fine tuning and triaxial spatial anisotropy of dressed atomic spins