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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 6, Iss. 5 — May. 1, 1989
  • pp: 871–876

High-sensitivity frequency-modulation spectroscopy with a GaAlAs diode laser

Liang-Guo Wang, Duncan A. Tate, Haris Riris, and Thomas F. Gallagher  »View Author Affiliations


JOSA B, Vol. 6, Issue 5, pp. 871-876 (1989)
http://dx.doi.org/10.1364/JOSAB.6.000871


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Abstract

A high-sensitivity spectroscopic system has been constructed with a GaAlAs diode laser by using two-tone frequency-modulation spectroscopy. We have demonstrated an absorption sensitivity of 3 × 10−7 in a 0.84-Hz bandwidth by using the Doppler-broadened water vapor absorption line at 12 238.32 cm−1. The sensitivity is limited by laser excess noise and is approximately five times less than the sensitivity expected on the basis of detector noise.

© 1989 Optical Society of America

History
Original Manuscript: November 18, 1988
Manuscript Accepted: February 6, 1989
Published: May 1, 1989

Citation
Liang-Guo Wang, Duncan A. Tate, Haris Riris, and Thomas F. Gallagher, "High-sensitivity frequency-modulation spectroscopy with a GaAlAs diode laser," J. Opt. Soc. Am. B 6, 871-876 (1989)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-6-5-871

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