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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 7, Iss. 2 — Feb. 1, 1990
  • pp: 164–171

Two-tone frequency-modulation spectroscopy with a CO2 laser

David E. Cooper and Clinton B. Carlisle  »View Author Affiliations


JOSA B, Vol. 7, Issue 2, pp. 164-171 (1990)
http://dx.doi.org/10.1364/JOSAB.7.000164


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Abstract

We report the laboratory demonstration of two-tone frequency-modulation spectroscopy with a continuous-wave (cw) CO2 laser. Using a resonant-cavity electro-optic phase modulator operating at 1 GHz, we obtained sensitivities to absorptions of 2 × 10−5 in a 1-Hz bandwidth from an étalon resonance and from calibrated mixtures of NH3. This sensitivity was within a factor of 3 of the quantum noise limit for our apparatus and was limited by baseline drift and fluctuations due to residual amplitude modulation and optical fringes.

© 1990 Optical Society of America

History
Original Manuscript: July 24, 1989
Manuscript Accepted: October 31, 1989
Published: February 1, 1990

Citation
David E. Cooper and Clinton B. Carlisle, "Two-tone frequency-modulation spectroscopy with a CO2 laser," J. Opt. Soc. Am. B 7, 164-171 (1990)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-7-2-164


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References

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