Sensitivity improvement of midinfrared gas sensing system using single-wavelength quantum cascade laser and hollow-waveguide gas cell

Takashi Katagiri; Keisuke Yaegashi; Yuji Matsuura

doi:10.1117/1.OE.56.8.080503

30 August 2017 Sensitivity improvement of midinfrared gas sensing system using single-wavelength quantum cascade laser and hollow-waveguide gas cell

Takashi Katagiri, Keisuke Yaegashi, Yuji Matsuura

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Optical Engineering, Vol. 56, Issue 8, 080503 (August 2017). https://doi.org/10.1117/1.OE.56.8.080503

Abstract

The configuration of a gas analysis system using the combination of a single-wavelength quantum cascade laser and a hollow-optical-fiber gas cell was optimized to improve measurement sensitivity. On the basis of theoretical calculation, a 6-m looped fiber gas cell was introduced into the system to more sensitively measure the concentration of nitric monoxide (NO) gas. High-precision measurement is achieved by precisely scanning the wavelength of the laser around the sharp absorption peak of NO gas. Concentrations of NO gas as low as 100 ppb were successfully measured.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Takashi Katagiri, Keisuke Yaegashi, and Yuji Matsuura "Sensitivity improvement of midinfrared gas sensing system using single-wavelength quantum cascade laser and hollow-waveguide gas cell," Optical Engineering 56(8), 080503 (30 August 2017). https://doi.org/10.1117/1.OE.56.8.080503

Received: 7 June 2017; Accepted: 14 August 2017; Published: 30 August 2017

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