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Proceedings Paper

Pressure-dependent sensitivity of battery based methane detection system using tunable diode laser at 3270 nm
Author(s): Seyed Ghasem Razavipour; James A. Gupta; Graeme Sabiston; Nicaulas Sabourin; Andrew Bezinger; Jean Lapointe; Daniel Poitras
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Paper Abstract

A compact, single-pass and low-power-consumption methane sensing system is presented and its sensitivity is investigated for a set of reference cells with pressures of 7.4, 74 and 740 Torr and the same methane concentration of 1351 ppm. A single-mode GaSb-based continuous-wave (CW) distributed feedback (DFB) tunable diode laser at 3270 nm and wavelength modulation spectroscopy were employed to collect 2f spectra in the ν3,R3 band of 12CH4. A modulated Voigt line profile model was used to fit the collected 2f spectra. The best detectivity of 4 ppbm is obtained for the highest pressure cell using an Allan-Werle variance analysis.

Paper Details

Date Published: 31 January 2020
PDF: 8 pages
Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 1128822 (31 January 2020); doi: 10.1117/12.2545014
Show Author Affiliations
Seyed Ghasem Razavipour, National Research Council (Canada)
James A. Gupta, National Research Council (Canada)
Graeme Sabiston, National Research Council (Canada)
Nicaulas Sabourin, National Research Council (Canada)
Andrew Bezinger, National Research Council (Canada)
Jean Lapointe, National Research Council (Canada)
Daniel Poitras, National Research Council (Canada)

Published in SPIE Proceedings Vol. 11288:
Quantum Sensing and Nano Electronics and Photonics XVII
Manijeh Razeghi; Jay S. Lewis; Giti A. Khodaparast; Pedram Khalili, Editor(s)

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