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Pump-probe differencing technique for cavity-enhanced, noise-canceling saturation laser spectroscopy.

Authors
  • de Vine, Glenn1
  • McClelland, David E
  • Gray, Malcolm B
  • Close, John D
  • 1 Centre for Gravitational Physics, Faculty of Science, The Australian National University, Canberra, ACT 0200, Australia. [email protected] , (Australia)
Type
Published Article
Journal
Optics letters
Publication Date
May 15, 2005
Volume
30
Issue
10
Pages
1219–1221
Identifiers
PMID: 15943315
Source
Medline
License
Unknown

Abstract

We present an experimental technique that permits mechanical-noise-free, cavity-enhanced frequency measurements of an atomic transition and its hyperfine structure. We employ the 532-nm frequency-doubled output from a Nd:YAG laser and an iodine vapor cell. The cell is placed in a folded ring cavity (FRC) with counterpropagating pump and probe beams. The FRC is locked with the Pound-Drever-Hall technique. Mechanical noise is rejected by differencing the pump and probe signals. In addition, this differenced error signal provides a sensitive measure of differential nonlinearity within the FRC.

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