Cavity ring-down spectroscopy with a pulsed distributed feedback quantum cascade laser

O. Sukhorukov; A. Lytkine; J. Manne; J. Tulip; W. Jäger

doi:10.1117/12.644378

28 February 2006 Cavity ring-down spectroscopy with a pulsed distributed feedback quantum cascade laser

O. Sukhorukov, A. Lytkine, J. Manne, J. Tulip, W. Jäger

Proceedings Volume 6127, Quantum Sensing and Nanophotonic Devices III; 61270A (2006) https://doi.org/10.1117/12.644378
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

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.

Citation Download Citation

O. Sukhorukov, A. Lytkine, J. Manne, J. Tulip, and W. Jäger "Cavity ring-down spectroscopy with a pulsed distributed feedback quantum cascade laser", Proc. SPIE 6127, Quantum Sensing and Nanophotonic Devices III, 61270A (28 February 2006); https://doi.org/10.1117/12.644378

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