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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 discussed first, 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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Acknowledgements

We have benefited invaluably from the collaboration with our co-workers at Picarro, and 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 over the past two decades. 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.

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Correspondence to Barbara Paldus .

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Paldus, B., Kachanov, A.A. (2023). Spectroscopic Techniques: Cavity-Enhanced Methods. In: Drake, G.W.F. (eds) Springer Handbook of Atomic, Molecular, and Optical Physics. Springer Handbooks. Springer, Cham. https://doi.org/10.1007/978-3-030-73893-8_45

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