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Saturated-Absorption Cavity Ring-Down (SCAR) for High-Sensitivity and High-Resolution Molecular Spectroscopy in the Mid IR

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Cavity-Enhanced Spectroscopy and Sensing

Part of the book series: Springer Series in Optical Sciences ((SSOS,volume 179))

Abstract

A non-conventional cavity ring-down spectroscopic technique is described. When the light intensity is well above the saturation level for the molecular species inside a high-finesse cavity, each single cavity ring-down event simultaneously measures both the background losses from the cavity mirrors and the linear absorption from the gas. Such a differential scheme acting on very short time scales (a few tens of microseconds) can improve the sensitivity of conventional cavity ring-down by more than one order of magnitude, while achieving sub-Doppler resolution, if needed. Applications to optical detection of very rare molecular species like radiocarbon dioxide and resolved molecular hyperfine structure in 17O12C16O are presented.

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Authors and Affiliations

  1. Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Via N. Carrara 1, 50019, Sesto Fiorentino, Italy

    P. Cancio, I. Galli, S. Bartalini, G. Giusfredi, D. Mazzotti & P. De Natale

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  1. P. Cancio
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  2. I. Galli
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  3. S. Bartalini
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  4. G. Giusfredi
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  5. D. Mazzotti
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  6. P. De Natale
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Correspondence to P. Cancio .

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Editors and Affiliations

  1. CNR-Istituto Nazionale di Ottica (INO), Pozzuoli, Italy

    Gianluca Gagliardi

  2. Dept. of Chemistry, Queen's University, Kingston, Ontario, Canada

    Hans-Peter Loock

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Cancio, P., Galli, I., Bartalini, S., Giusfredi, G., Mazzotti, D., De Natale, P. (2014). Saturated-Absorption Cavity Ring-Down (SCAR) for High-Sensitivity and High-Resolution Molecular Spectroscopy in the Mid IR. In: Gagliardi, G., Loock, HP. (eds) Cavity-Enhanced Spectroscopy and Sensing. Springer Series in Optical Sciences, vol 179. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40003-2_4

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