A measurement method of transverse light-shift in atomic spin co-magnetometer

TL;DR

This paper presents a method to measure and reduce the transverse light-shift in an atomic spin co-magnetometer, enhancing its accuracy by optimizing probe light parameters.

Contribution

It introduces a novel measurement technique for transverse light-shift and demonstrates its reduction through probe light wavelength optimization.

Findings

Transverse light-shift reduced from -0.115 nT to -0.039 nT.

Calibration coefficient increased with optimization.

Method enables precise compensation of light-shift effects.

Abstract

We disclose a method to obtain the transverse light-shift along the probe light of a single-axis alkali metal-noble gas co-magnetometer. The relationship between transverse compensating field and light-shift is deduced through the steady-state solution of Bloch equations. The variety of probe light intensity is used to obtain the residual magnetic field, and step modulation tests are applied to acquire the total spin-relaxation rate of electron spins and self-compensation point. Finally, the transverse light-shift is reduced from -0.115 nT to -0.039 nT by optimizing the probe light wavelength, and the value of the calibration coefficient can be increased simultaneously.