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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 20, Iss. 16 — Aug. 15, 1995
  • pp: 1731–1733

Optical interference fringe reduction in frequency-modulation spectroscopy experiments

Dag Roar Hjelme, Steinar Neegård, and Erling Vartdal  »View Author Affiliations


Optics Letters, Vol. 20, Issue 16, pp. 1731-1733 (1995)
http://dx.doi.org/10.1364/OL.20.001731


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Abstract

We show both theoretically and experimentally that interference fringe signals can always be suppressed to improve the signal-to-noise ratio, provided that the modulation frequency is of the order of the absorption linewidth or higher. Suppression of optical interference fringes by more than 1 order of magnitude and signal-to- noise ratio enhancement of more than 13 dB is demonstrated by use of a proper choice of laser modulation frequency. A further fringe reduction of 10 dB is possible by adjustment of the local oscillator phase.

© 1995 Optical Society of America

History
Original Manuscript: March 17, 1995
Published: August 15, 1995

Citation
Dag Roar Hjelme, Steinar Neegård, and Erling Vartdal, "Optical interference fringe reduction in frequency-modulation spectroscopy experiments," Opt. Lett. 20, 1731-1733 (1995)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-16-1731

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