Free-induction-decay magnetometer based on a microfabricated Cs vapor cell

D. Hunter, S. Piccolomo, J. D. Pritchard, N. L. Brockie, T. E. Dyer, E. Riis

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We describe an optically pumped Cs magnetometer containing a 1.5 mm thick microfabricated vapor cell with nitrogen buffer gas operating in a free-induction-decay (FID) configuration. This allows us to monitor the free Larmor precession of the spin coherent Cs atoms by separating the pump and probe phases in the time domain. A single light pulse can sufficiently polarize the atomic sample however, synchronous modulation of the light field actively drives the precession and maximizes the induced spin coherence. Both amplitude and frequency modulation have been implemented with noise floors of 3 pT / √ Hz and 16 pT / √ Hz respectively within the Nyquist limited bandwidth of 500 Hz .
LanguageEnglish
Article number014002
Number of pages10
JournalPhysical Review Applied
Issue number10
Early online date5 Jul 2018
DOIs
Publication statusE-pub ahead of print - 5 Jul 2018

Fingerprint

magnetometers
induction
Larmor precession
vapors
decay
cells
precession
frequency modulation
buffers
pumps
bandwidth
modulation
nitrogen
probes
configurations
pulses
gases
atoms

Keywords

  • atomic physics
  • optical spectroscopy
  • optical pumping
  • Zeeman effect
  • Larmor spin precession
  • metrology

Cite this

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abstract = "We describe an optically pumped Cs magnetometer containing a 1.5 mm thick microfabricated vapor cell with nitrogen buffer gas operating in a free-induction-decay (FID) configuration. This allows us to monitor the free Larmor precession of the spin coherent Cs atoms by separating the pump and probe phases in the time domain. A single light pulse can sufficiently polarize the atomic sample however, synchronous modulation of the light field actively drives the precession and maximizes the induced spin coherence. Both amplitude and frequency modulation have been implemented with noise floors of 3 pT / √ Hz and 16 pT / √ Hz respectively within the Nyquist limited bandwidth of 500 Hz .",
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Free-induction-decay magnetometer based on a microfabricated Cs vapor cell. / Hunter, D.; Piccolomo, S.; Pritchard, J. D.; Brockie, N. L.; Dyer, T. E.; Riis, E.

In: Physical Review Applied, No. 10, 014002, 05.07.2018.

Research output: Contribution to journalArticle

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T1 - Free-induction-decay magnetometer based on a microfabricated Cs vapor cell

AU - Hunter, D.

AU - Piccolomo, S.

AU - Pritchard, J. D.

AU - Brockie, N. L.

AU - Dyer, T. E.

AU - Riis, E.

N1 - Article corrected on 6 July 2018 to include link in data statement

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KW - atomic physics

KW - optical spectroscopy

KW - optical pumping

KW - Zeeman effect

KW - Larmor spin precession

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