NDLI: Employing cavity ring-down spectroscopy to probe dilute species in hostile environments

Content Provider	IEEE Xplore Digital Library
Author	Spence, T.G. Paldus, B.A. Wahl, E.H. Aderhold, D.D. Xie, J.C. Owano, T.G. Laux, C.O. Kruger, C.H. Zare, R.N.
Copyright Year	1998
Description	Author affiliation: Dept. of Chem., Stanford Univ., CA, USA (Spence, T.G.)
Abstract	Summary form only given, as follows. Cavity ring-down spectroscopy (CRDS) is newly developed spectroscopic technique which may be used to determine the concentration of very dilute gas-phase species present in hostile environments. Unlike traditional absorption techniques which measure the attenuation of light passing through a sample, in CRDS light from a pulsed laser is injected into a high-finesse cavity formed by two or more high reflectivity mirrors. Light leaking from the resonator through one of the mirrors is then used to measure the rate of decay of the pulse of light within the cavity. Absorption by species present within the resonator increase the rate of decay of light in the cavity. Therefore, by measuring this ring-down rate with and without sample present within the resonator, the absorbance of the sample may be measured and its absolute concentration determined. The largest advantage of CRDS is its insensitivity to fluctuations in the intensity of the light source; these fluctuations limit the sensitivity of traditional absorption techniques. Furthermore, since the decay of coherent light from the resonator is being detected, CRDS may be used to measure species in environments with high background radiation levels such as flames and discharges. Advancements in the use of this technique to measure the concentration of species in hostile environments will be discussed as well as the application of continuous-wave laser sources to the technique.
File Size	107919
File Format	PDF
ISBN	0780347927
ISSN	07309244
DOI	10.1109/PLASMA.1998.677496
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectroscopy Probes Pulse measurements Absorption Mirrors Fluctuations Attenuation measurement Optical attenuators Optical pulses Gas lasers
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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