Cavity enhanced atomic magnetometry

Abstract

Atom sensing based on Faraday rotation is an indispensable method for precision measurements, universally suitable for both hot and cold atomic systems. Here we demonstrate an all-optical magnetometer where the optical cell for Faraday rotation spectroscopy is augmented with a low finesse cavity. Unlike in previous experiments, where specifically designed multipass cells had been employed, our scheme allows to use conventional, spherical vapour cells. Spherical shaped cells have the advantage that they can be effectively coated inside with a spin relaxation suppressing layer providing long spin coherence times without addition of a buffer gas. Cavity enhancement shows in an increase in optical polarization rotation and sensitivity compared to single-pass configurations.

6 pages, 5 figures

References in corpus (2)

• Magnetometry Based on Nonlinear Magneto-Optical Rotation with Amplitude-Modulated Light
• A large sample study of spin relaxation and magnetometric sensitivity of paraffin-coated Cs vapor cells

Cited by in corpus (10)

• Quantum limits to the energy resolution of magnetic field sensors
• Precision Magnetometers for Aerospace Applications
• Femtotesla direct magnetic gradiometer using a single multipass cell
• Laser-written vapor cells for chip-scale atomic sensing and spectroscopy
• A Multi-Pass Optically Pumped Rubidium Atomic Magnetometer with Free Induction Decay
• Alignment-based optically pumped magnetometer using a buffer gas cell
• Linear and nonlinear magneto-optical rotation on the narrow strontium intercombination line
• In-vivo biomagnetic characterisation of the American cockroach
• Cavity-enhanced detection of spin polarization in a microfabricated atomic vapor cell
• Cavity-enhanced polarization rotation measurements for low-disturbance probing of atoms