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Proceedings Paper

Pure amplitude and wavelength modulation spectroscopy for detection of N2O using a three-section quantum cascade laser
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Paper Abstract

We report on a novel quantum cascade laser (QCL) capable of operating in pure amplitude or wavelength modulation configuration thereby allowing the acquisition of background-free gas absorption-line profiles using quartz-enhanced photoacoustic spectroscopy (QEPAS). The QCL is composed of three electrically independent sections: Gain, Phase (PS) and Master Oscillator (MO). The non-uniform pumping of these three QCL sections allows laser wavelength tuning with constant optical power and vice-versa. Pure QEPAS amplitude modulation operating conditions were obtained by modulating the PS current, while pure wavelength modulation was obtained by modulating the MO section and slowly scanning the PS current.

Paper Details

Date Published: 27 January 2017
PDF: 8 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 1011109 (27 January 2017); doi: 10.1117/12.2252352
Show Author Affiliations
Pietro Patimisco, Politecnico di Bari, CNR (Italy)
Rice Univ. (United States)
Angelo Sampaolo, Politecnico di Bari, CNR (Italy)
Rice Univ. (United States)
Yves Bidaux, Alpes Lasers SA (Switzerland)
Alfredo Bismuto, Alpes Lasers SA (Switzerland)
Marshall Scott, Thorlabs, Inc. (United States)
James Jiang, Thorlabs, Inc. (United States)
Frank K. Tittel, Rice Univ. (United States)
Vincenzo Spagnolo, Politecnico di Bari, CNR (Italy)

Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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