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Published May 21, 2012 | public
Journal Article

Frequency-stabilized cavity ring-down spectroscopy


We describe frequency-stabilized cavity ring-down spectroscopy (FS-CRDS), an ultraprecise refinement of conventional CRDS. We review the technique and highlight some recent studies that have utilized FS-CRDS to perform precision measurements of molecular transitions in the near-infrared. We describe system enhancements that are currently under implementation, including Pound–Drever–Hall locking and optical frequency comb-stabilization, which have the potential to reduce the uncertainty in both the absorption and frequency axes of our spectra by more than an order of magnitude. Finally, we describe high impact applications of this capability that can exploit frequency axis uncertainty at the 10 kHz level and signal-to-noise ratios exceeding 200000:1.

Additional Information

© 2012 Elsevier B.V. Available online 21 March 2012. We would like to acknowledge all of those who have contributed to the development and application of FS-CRDS including: David J. Robichaud, Daniel K. Havey, Liwei Yuan, Jeremie B. Courtois, Roman Ciuryło, Katarzyna Bielska, Piotr Masłowski, Linda R. Brown, Laurence Y. Yeung, Gregory J. Rosasco, J. Patrick Looney, James R. Whetstone, Gregory E. Scace, W. Wyatt Miller, Howard P. Layer, Ryszard S. Trawiński, Szymon Wójtewicz, Jolanta Domysławska, and Mariusz Piwiński. We acknowledge continual support from the National Institute of Standards and Technology (NIST), Gaithersburg, MD, including the NIST Greenhouse Gas Measurements and Climate Research Program, which made much of the work described herein possible. Part of the research described in this Letter was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). Additional support was provided by the Orbiting Carbon Observatory (OCO) project, a NASA Earth System Science Pathfinder (ESSP) mission; the NASA Upper Atmospheric Research Program Grants NNG06GD88G and NNX09AE21G; National Science Foundation (NSF) Grant CHE-0957490, and the NASA Atmospheric Carbon Observations from Space (ACOS) Grant 104127-04.02.02. The research was partially supported by the Foundation for Polish Science TEAM Project co-financed by the EU European Regional Development Fund and is part of the program of the National Laboratory FAMO in Toruń, Poland. A. Cygan is supported by the Polish NCN Project No. N N202 2392 40. The research was also supported by the National Science Centre, Project No. DEC-2011/01/B/ST2/ 00491.

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