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Proceedings Paper

Miniaturized laser magnetometers and clocks
Author(s): Robert Wynands; C. Affolderbach; Leo W. Hollberg; John E. Kitching; Svenja A. Knappe; M. Staehler
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Paper Abstract

We have experimentally investigated the potential of narrow coherent population trapping (CPT) resonances for precision applications like magnetometry or atomic frequency standards, using the D lines in thermal Cs or Rb vapor. The magnetometer operates by monitoring the position of the Zeeman-shifted outermost resonance component. The central Zeeman component is well suited for frequency standard applications because its position is shifted by magnetic fields only in second order. We derive the required pair of laser fields form a special diode laser by direct modulation of the injection current. Magneto metric sensitivity down to a picotesla and 10-12 relative instability for a finger-sized clock have been achieved in this way. Use of a magnetic gradiometer allows to cancel fluctuations of ambient magnetic fields to a large degree, making possible sensitive measurements even outside magnetically shielded rooms.

Paper Details

Date Published: 1 April 2002
PDF: 12 pages
Proc. SPIE 4750, ICONO 2001: Quantum and Atomic Optics, High-Precision Measurements in Optics, and Optical Information Processing, Transmission, and Storage, (1 April 2002); doi: 10.1117/12.464463
Show Author Affiliations
Robert Wynands, Univ. Bonn (Germany)
C. Affolderbach, Univ. Bonn (Germany)
Leo W. Hollberg, National Institute of Standards and Technology (United States)
John E. Kitching, National Institute of Standards and Technology (United States)
Svenja A. Knappe, Univ. Bonn (Germany)
M. Staehler, Univ. Bonn (Germany)


Published in SPIE Proceedings Vol. 4750:
ICONO 2001: Quantum and Atomic Optics, High-Precision Measurements in Optics, and Optical Information Processing, Transmission, and Storage

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