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Proceedings Paper

Cavity ring-down spectroscopy with a pulsed distributed feedback quantum cascade laser
Author(s): O. Sukhorukov; A. Lytkine; J. Manne; J. Tulip; W. Jäger
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Paper Abstract

A pulsed distributed feedback quantum cascade laser operating near 970 cm-1 (10.3 μm) was coupled with the technique of cavity ring-down spectroscopy, as described here for the first time. The newly constructed set-up was tested by recording three relatively weak rotational lines of the 1000→0001 vibrational band of CO2 in the range from 966.75 cm-1 to 971.5 cm-1. The CO2 lines were recorded by measuring the decay time of a CO2 - N2 mixture flowing through an open sample tube placed between the cavity ring-down mirrors. The quantum cascade laser frequency was tuned at a rate of ~ 0.071 cm-1/K by changing the heat sink temperature in the range between -20 and 50 °C. The first results demonstrated the applicability and high sensitivity of the cavity ring-down spectroscopy - pulsed quantum cascade laser combination and encouraged us to extend our research to the study and detection of ammonia. We demonstrated that a detection limit of ammonia of ~ 25 ppbv can be attained with the current set-up. Basic instrument performance and optimization of the experimental parameters for sensitivity improvement are discussed.

Paper Details

Date Published: 28 February 2006
PDF: 11 pages
Proc. SPIE 6127, Quantum Sensing and Nanophotonic Devices III, 61270A (28 February 2006); doi: 10.1117/12.644378
Show Author Affiliations
O. Sukhorukov, Univ. of Alberta (Canada)
A. Lytkine, Univ. of Alberta (Canada)
J. Manne, Univ. of Alberta (Canada)
J. Tulip, Univ. of Alberta (Canada)
W. Jäger, Univ. of Alberta (Canada)

Published in SPIE Proceedings Vol. 6127:
Quantum Sensing and Nanophotonic Devices III
Manijeh Razeghi; Gail J. Brown, Editor(s)

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