A high-bandwidth atomic magnetometer

Nathanial Wilson; Rujie Li; Christopher Perrella; Philip Light; Russell Anderson; Andre Luiten

doi:10.1117/12.2541255

30 December 2019 A high-bandwidth atomic magnetometer

Nathanial Wilson, Rujie Li, Christopher Perrella, Philip Light, Russell Anderson, Andre Luiten

Proceedings Volume 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019; 112000M (2019) https://doi.org/10.1117/12.2541255
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

We have studied the bandwidth of atomic magnetometers based on nonlinear magneto-optical rotation (NMOR). We demonstrated broadband, high-bandwidth magnetic field measurements from DC up to 100kHz with two different techniques. The first technique measures the instantaneous phase evolution of the optical polarisation rotation in the temporal domain which enabled quantitative measurements of modulated magnetic fields up to 100kHz for a carrier frequency of 30kHz, while the second method employs active feedback techniques to track magnetic field fluctuations up to 100kHz, approximately 2800-fold greater than the passive bandwidth. For the latter case, a slew rate of 91.4nT/μs and a sensitivity of 200fT/Hz^1/2 around 8Hz have been achieved at a bias field of 50μT.

Citation Download Citation

Nathanial Wilson, Rujie Li, Christopher Perrella, Philip Light, Russell Anderson, and Andre Luiten "A high-bandwidth atomic magnetometer", Proc. SPIE 11200, AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019, 112000M (30 December 2019); https://doi.org/10.1117/12.2541255

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