Magnetometry Based on Nonlinear Magneto-Optical Rotation with Amplitude-Modulated Light

Abstract

We report on an all-optical magnetometric technique based on nonlinear magneto-optical rotation with amplitude-modulated light. The method enables sensitive magnetic-field measurements in a broad dynamic range. We demonstrate the sensitivity of $4.3\times 10^{-9}$ G/$\sqrt{\text{Hz}}$ at 10 mG and the magnetic field tracking in a range of 40 mG. The fundamental limits of the method sensitivity and factors determining current performance of the magnetometer are discussed.

Submitted to Journal of Applied Physics 8 pages, 8 figures

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