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

doi:10.1103/PhysRevApplied.10.014002

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

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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 .

Original language	English
Article number	014002
Number of pages	10
Journal	Physical Review Applied
Issue number	10
Early online date	5 Jul 2018
DOIs	https://doi.org/10.1103/PhysRevApplied.10.014002
Publication status	E-pub ahead of print - 5 Jul 2018

Keywords

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

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10.1103/PhysRevApplied.10.014002

Hunter-etal-PRA-2018-Free-induction-decay-magnetometer-based-on-a-microfabricated-Cs-vapor-cellAccepted author manuscript, 1.39 MB

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title = "Free-induction-decay magnetometer based on a microfabricated Cs vapor cell",

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 .",

keywords = "atomic physics, optical spectroscopy, optical pumping, Zeeman effect, Larmor spin precession, metrology",

author = "D. Hunter and S. Piccolomo and Pritchard, {J. D.} and Brockie, {N. L.} and Dyer, {T. E.} and E. Riis",

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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

PY - 2018/7/5

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N2 - 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 .

AB - 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 .

KW - atomic physics

KW - optical spectroscopy

KW - optical pumping

KW - Zeeman effect

KW - Larmor spin precession

KW - metrology

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U2 - 10.1103/PhysRevApplied.10.014002

DO - 10.1103/PhysRevApplied.10.014002

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JO - Physical Review Applied

JF - Physical Review Applied

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

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

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