Elliptically polarized laser-pumped $M_x$ magnetometer towards applications at room temperature

Abstract

An atomic magnetometer operated with elliptically polarized light is investigated theoretically and experimentally. To explore the potential of this magnetometric configuration, the analytical form of the outgoing signal is derived. Parameters that significantly influence the performance are optimized, which lead to a sensitivity of 300 $fT/\sqrt{\mathrm{Hz}}$ at 45 ${}^{\circ }$C with a 2$\times$2$\times 2$ cm uncoated Rb vapor cell. It is remarkable that a sensitivity of 690 $fT/\sqrt{\mathrm{Hz}}$ is achieved at room temperature of 24 ${}^{\circ }$C, which is improved by an order of magnitude compared with the conventional $M_x$ magnetometer under its own optimized condition. The elliptically polarized approach offers attractive features for developing compact, low-power magnetometers, which are available without heating the uncoated vapor cell.

References in corpus (5)

• Optical Magnetometry
• Ultra-high sensitivity magnetic field and magnetization measurements with an atomic magnetometer
• Sub-femtotesla scalar atomic magnetometer using multipass cells
• A 20-Channel Magnetoencephalography System Based on Optically Pumped Magnetometers
• Optimization and performance of an optical cardio-magnetometer

Cited by in corpus (3)

• A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay
• All-optical atomic magnetometry using an elliptically polarized amplitude-modulated light wave
• Characterizing current noise of commercial constant-current sources by using of an optically-pumped rubidium atomic magnetometer