CW FIBER LASER CAVITY RING DOWN SPECTROSCOPY
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Date
2005
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Application of a tunable near-infrared Erbium doped fiber laser to continuous-wave (cw) cavity ring down spectroscopy (CRDS) is reported. The laser is widely tunable in the spectral region of 1542-1600 nm by temperature tuning with a laser linewidth of $\sim$ kHz. This ultranarrow linewidth is highly desirable for efficient cw laser coupling to a high-finesse ring down cavity} \underline{\textbf{41}}, 6980 (2002).}. Cavity ring down spectra of N$_2$O and C$_2$H$_2$ have been recorded near 1.544 $\mu$m. Measurements of N$_2$O concentration have been performed as well with high dynamic range varying from 100 \% purity to some tens ppb with a minimum measurable absorption coefficient of about 10$^{-10}$ cm$^{-1}$. Preliminary results will be presented.
Description
{J. Morville, D. Romanini, M. Chenevier, A. Kachanov, \textit{Appl. Opt.
Author Institution: Laboratoire de Physicochimie de l'Atmosphere,; Universite du Littoral Cote d'Opale, 189A, Av. Maurice Schumann,; 59140 Dunkerque, France; Laboratoire de Spectrometrie Physique, Universite J. Fourier de Grenoble,; 140 rue de la Physique, 38402 St Martin d'Heres, France
Author Institution: Laboratoire de Physicochimie de l'Atmosphere,; Universite du Littoral Cote d'Opale, 189A, Av. Maurice Schumann,; 59140 Dunkerque, France; Laboratoire de Spectrometrie Physique, Universite J. Fourier de Grenoble,; 140 rue de la Physique, 38402 St Martin d'Heres, France