High-bandwidth optical magnetometer

作者：Ricardo Jiménez-Martínez, W. C. Griffith, Svenja Knappe, John Kitching, Mark Prouty · 发表于：Journal of the Optical Society of America B · 年份：2012 · DOI：10.1364/josab.29.003398 · 被引用次数：60 · 研究领域：Atomic and Subatomic Physics Research、Quantum optics and atomic interactions、Cold Atom Physics and Bose-Einstein Condensates

We demonstrate a scalar Rb87 optical magnetometer that retains magnetic-field sensitivities below 10pT/√Hzover 3 dB bandwidths of 10 kHz in an ambient field Bo=11.4 μT and using a measurement volume of 1 mm3. The magnetometer operates at high atomic densities where both the sensitivity and the bandwidth are limited by spin-exchange collisions between the alkali atoms. By operating in this regime, our measurements show that the bandwidth of the magnetometer can be increased without a significant degradation in its sensitivity.