Miniaturized laser magnetometers and clocks

Robert Wynands; C. Affolderbach; Leo W. Hollberg; John E. Kitching; Svenja A. Knappe; M. Staehler

doi:10.1117/12.464463

1 April 2002 Miniaturized laser magnetometers and clocks

Robert Wynands, C. Affolderbach, Leo W. Hollberg, John E. Kitching, Svenja A. Knappe, M. Staehler

Proceedings Volume 4750, ICONO 2001: Quantum and Atomic Optics, High-Precision Measurements in Optics, and Optical Information Processing, Transmission, and Storage; (2002) https://doi.org/10.1117/12.464463
Event: XVII International Conference on Coherent and Nonlinear Optics (ICONO 2001), 2001, Minsk, Belarus

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.

Citation Download Citation

Robert Wynands, C. Affolderbach, Leo W. Hollberg, John E. Kitching, Svenja A. Knappe, and M. Staehler "Miniaturized laser magnetometers and clocks", Proc. SPIE 4750, ICONO 2001: Quantum and Atomic Optics, High-Precision Measurements in Optics, and Optical Information Processing, Transmission, and Storage, (1 April 2002); https://doi.org/10.1117/12.464463

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