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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 7 — Apr. 1, 2014
  • pp: 1795–1798

Very high finesse optical-feedback cavity-enhanced absorption spectrometer for low concentration water vapor isotope analyses

J. Landsberg, D. Romanini, and E. Kerstel  »View Author Affiliations


Optics Letters, Vol. 39, Issue 7, pp. 1795-1798 (2014)
http://dx.doi.org/10.1364/OL.39.001795


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Abstract

So far, cavity-enhanced absorption spectroscopy (CEAS) has been based on optical cavities with a high finesse F that, however, has been limited by mirror reflectivity and by cavity transmission considerations to a few times 10,000. Here, we demonstrate a compact near-infrared optical-feedback CEAS instrument for water vapor isotope ratio measurements, with F>140,000. We show that this very high finesse can be effectively exploited to improve the detection sensitivity to the full extent predicted by the increased effective path length to reach a noise equivalent absorption sensitivity of 5.7×1011cm1Hz1/2 for a full spectrum registration (including possible effects of interference fringes and fit model inadequacies).

© 2014 Optical Society of America

OCIS Codes
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(300.6190) Spectroscopy : Spectrometers
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Spectroscopy

History
Original Manuscript: November 8, 2013
Revised Manuscript: February 18, 2014
Manuscript Accepted: February 18, 2014
Published: March 19, 2014

Citation
J. Landsberg, D. Romanini, and E. Kerstel, "Very high finesse optical-feedback cavity-enhanced absorption spectrometer for low concentration water vapor isotope analyses," Opt. Lett. 39, 1795-1798 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-7-1795

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