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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 36, Iss. 4 — Feb. 15, 2011
  • pp: 460–462

Modulation cancellation method for measurements of small temperature differences in a gas

Vincenzo Spagnolo, Lei Dong, Anatoliy A. Kosterev, David Thomazy, James H. Doty, III, and Frank K. Tittel  »View Author Affiliations


Optics Letters, Vol. 36, Issue 4, pp. 460-462 (2011)
http://dx.doi.org/10.1364/OL.36.000460


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Abstract

An innovative spectroscopic technique based on balancing and cancellation of modulated signals induced by two excitation sources is reported. For its practical implementation, we used quartz-enhanced photoacoustic spectroscopy as an absorption-sensing technique and applied the new approach to measure small temperature differences between two gas samples. The achieved sensitivity was 30 mK in 17 s. A theoretical sensitivity analysis is presented, and the applicability of this method to isotopic measurements is discussed.

© 2011 Optical Society of America

OCIS Codes
(140.5960) Lasers and laser optics : Semiconductor lasers
(280.3420) Remote sensing and sensors : Laser sensors

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: October 25, 2010
Revised Manuscript: December 21, 2010
Manuscript Accepted: January 5, 2011
Published: February 3, 2011

Citation
Vincenzo Spagnolo, Lei Dong, Anatoliy A. Kosterev, David Thomazy, James H. Doty, III, and Frank K. Tittel, "Modulation cancellation method for measurements of small temperature differences in a gas," Opt. Lett. 36, 460-462 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-4-460


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References

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