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Proceedings Paper

A high-bandwidth atomic magnetometer
Author(s): Nathanial Wilson; Rujie Li; Christopher Perrella; Philip Light; Russell Anderson; Andre Luiten
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Paper 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/Hz1/2 around 8Hz have been achieved at a bias field of 50μT.

Paper Details

Date Published: 30 December 2019
PDF: 2 pages
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); doi: 10.1117/12.2541255
Show Author Affiliations
Nathanial Wilson, The Univ. of Adelaide (Australia)
Rujie Li, The Univ. of Adelaide (Australia)
Christopher Perrella, The Univ. of Adelaide (Australia)
Philip Light, The Univ. of Adelaide (Australia)
Russell Anderson, La Trobe Univ. (Australia)
Andre Luiten, The Univ. of Adelaide (Australia)


Published in SPIE Proceedings Vol. 11200:
AOS Australian Conference on Optical Fibre Technology (ACOFT) and Australian Conference on Optics, Lasers, and Spectroscopy (ACOLS) 2019
Arnan Mitchell; Halina Rubinsztein-Dunlop, Editor(s)

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