Heading-error-free optical atomic magnetometry in the Earth-field range

Abstract

Alkali-metal atomic magnetometry is widely used due to its high sensitivity and cryogen-free operation. However, when operating in geomagnetic field, it suffers from heading errors originating from nonlinear Zeeman (NLZ) splittings and magnetic resonance asymmetries, which lead to difficulties in mobile-platform measurements. We demonstrate an alignment based ${}^{87}$Rb magnetometer, which, with only a single magnetic resonance peak and well-separated hyperfine transition frequencies, is insensitive or even immune to NLZ-related heading errors. It is shown that the magnetometer can be implemented for practical measurements in the geomagnetic environments and the photon-shot-noise-limited sensitivity reaches $9\mathrm{fT}/\sqrt{\mathrm{Hz}}$ at room temperature.

arXiv comment8 pages, 5 figures

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Cited by in corpus (7)

• Optical pumping enhancement of a free-induction-decay magnetometer
• Correcting heading errors in optically pumped magnetometers through microwave interrogation
• All-optical atomic magnetometry using an elliptically polarized amplitude-modulated light wave
• Investigating the hyperfine systematic error and relative phase in low spin-polarization alkali FID magnetometers
• Characterizing current noise of commercial constant-current sources by using of an optically-pumped rubidium atomic magnetometer
• Anomalous suppression of spin-exchange relaxation in alignment signals in cesium in ultra-weak magnetic fields
• Bistability of optical properties of cesium vapor due to collective interaction of alignment and orientation under strong spin exchange conditions