Quantitative optical spectroscopy of ${}^{87}$Rb vapour in the Voigt geometry in DC magnetic fields up to 0.4T

Abstract

We present a detailed spectroscopic investigation of a thermal ${}^{87}$Rb atomic vapour in magnetic fields up to 0.4T in the Voigt geometry. We fit experimental spectra with our theoretical model \textit{ElecSus} and find excellent quantitative agreement, with RMS errors of $\sim 0.3$%. We extract the magnetic field strength and the angle between the polarisation of the light and the magnetic field from the atomic signal and find excellent agreement to within $\sim 1$% with a commercial Hall probe. Finally, we present an investigation of the relative sensitivity of this technique to variations in the field strength and angle with a view to enabling atom-based high-field vector magnetometry.

arXiv comment9 pages, 8 figures

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• Precision Measurement of the Excited State Landé g-factor and Diamagnetic Shift of the Cesium D${}_2$ Line
• Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters
• Features of Magnetically-induced atomic transitions of Rb D${}_1$ line studied by Doppler-free method based on the second derivative of the absorption spectra