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Spectroscopic Techniques: Cavity-Enhanced Methods

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Springer Handbook of Atomic, Molecular, and Optical Physics

Part of the book series: Springer Handbooks ((SHB))

Abstract

Cavity enhanced spectroscopy (CES) methodology provides a much higher degree of sensitivity than that available from conventional absorption spectrometers. The aim of this chapter is to present the fundamentals of the method, and the various modifications and extensions that have been developed. In order to set the stage, the limitations of traditional absorption spectrometers are first discussed, followed by a description of cavity ring-down spectroscopy (CRDS), the most popular CES embodiment. A few other well-known CES approaches are also described in detail. The chapter concludes with a discussion of recent work on extending CRDS to the study of liquids and solids.

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Abbreviations

AOM:

acoustooptic modulator

AU:

absorbance units

CEAS:

cavity enhanced absorption spectroscopy

CES:

cavity enhanced spectroscopy

CETS:

cavity enhanced transmission spectroscopy

CRDS:

cavity ring-down spectroscopy

CW-CRDS:

continuous-Wave Cavity Ring-Down Spectroscopy

CW:

continuous wave

DFB:

distributed feedback

EW-CRDS:

evanescent-wave CRDS

FM:

frequency modulation

FT:

Fourier transform

FTIR:

Fourier transform infrared spectroscopy

ICOS:

integrated cavity output spectroscopy

L-CETS:

locked cavity enhanced transmission spectroscopy

LM:

Levenberg-Marquardt

MDAL:

minimum detectable absorption loss

NDIR:

non-dispersive infrared

NICE-OHMS:

noise-immune, cavity-enhanced optical heterodyne molecular spectroscopy

P-CRDS:

pulsed-cavity ringdown spectroscopy

PZT:

piezo-electric transducer

RDC:

ring-down cavity

UV-VIS:

ultraviolet-visible

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Acknowledgements

We have benefited invaluably from the collaboration with our co-workers at Picarro, and would especially like to acknowledge Eric Crosson, Bruce Richman, Sze Tan, Bernard Fidric, Ed Wahl, and Herb Burkard. We would like to extend our gratitude to Prof. Richard N. Zare and Dr. Marc Levenson for their unwavering support in helping make CRDS a commercial reality. We would also like to express our appreciation to all of our scientific collaborators worldwide, both industrial and academic, for their friendship, openness, and help over the years. Barb would like to dedicate this chapter to her father, Prof. Josef Paldus, who has been an inspiration to her throughout her career, and with whom it is an honor to share a publication in the same book.

Author information

Authors and Affiliations

  1. Skymoon Ventures, 3045 Park Boulevard, 94306, Palo Alto, CA, USA

    Barbara Paldus

  2. Picarro, Inc., Research and Development, 480 Oakmead Parkway, 94085, Sunnyvale, CA, USA

    Alexander Kachanov

Authors
  1. Barbara Paldus
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  2. Alexander Kachanov
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Corresponding authors

Correspondence to Barbara Paldus or Alexander Kachanov .

Editor information

Editors and Affiliations

  1. Department of Physics, University of Windsor, 401 Sunset St., N9B 3P4, Windsor, ON, Canada

    Gordon Drake Prof.

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© 2006 Springer-Verlag

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Paldus, B., Kachanov, A. (2006). Spectroscopic Techniques: Cavity-Enhanced Methods. In: Drake, G. (eds) Springer Handbook of Atomic, Molecular, and Optical Physics. Springer Handbooks. Springer, New York, NY. https://doi.org/10.1007/978-0-387-26308-3_43

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