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

Pietro Patimisco; Angelo Sampaolo; Yves Bidaux; Alfredo Bismuto; Marshall Scott; James Jiang; Frank K. Tittel; Vincenzo Spagnolo

doi:10.1117/12.2252352

27 January 2017 Pure amplitude and wavelength modulation spectroscopy for detection of N₂O using a three-section quantum cascade laser

Pietro Patimisco, Angelo Sampaolo, Yves Bidaux, Alfredo Bismuto, Marshall Scott, James Jiang, Frank K. Tittel, Vincenzo Spagnolo

Author Affiliations +

Proceedings Volume 10111, Quantum Sensing and Nano Electronics and Photonics XIV; 1011109 (2017) https://doi.org/10.1117/12.2252352
Event: SPIE OPTO, 2017, San Francisco, California, United States

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.

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Pietro Patimisco, Angelo Sampaolo, Yves Bidaux, Alfredo Bismuto, Marshall Scott, James Jiang, Frank K. Tittel, and Vincenzo Spagnolo "Pure amplitude and wavelength modulation spectroscopy for detection of N₂O using a three-section quantum cascade laser", Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 1011109 (27 January 2017); https://doi.org/10.1117/12.2252352

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