Pressure-dependent sensitivity of battery based methane detection system using tunable diode laser at 3270 nm

Seyed Ghasem Razavipour; James A. Gupta; Graeme Sabiston; Nicaulas Sabourin; Andrew Bezinger; Jean Lapointe; Daniel Poitras

doi:10.1117/12.2545014

31 January 2020 Pressure-dependent sensitivity of battery based methane detection system using tunable diode laser at 3270 nm

Seyed Ghasem Razavipour, James A. Gupta, Graeme Sabiston, Nicaulas Sabourin, Andrew Bezinger, Jean Lapointe, Daniel Poitras

Author Affiliations +

Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 1128822 (2020) https://doi.org/10.1117/12.2545014
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

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Seyed Ghasem Razavipour, James A. Gupta, Graeme Sabiston, Nicaulas Sabourin, Andrew Bezinger, Jean Lapointe, and Daniel Poitras "Pressure-dependent sensitivity of battery based methane detection system using tunable diode laser at 3270 nm", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 1128822 (31 January 2020); https://doi.org/10.1117/12.2545014

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