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Optical Engineering • Open Access

Sensitivity improvement of midinfrared gas sensing system using single-wavelength quantum cascade laser and hollow-waveguide gas cell
Author(s): Takashi Katagiri; Keisuke Yaegashi; Yuji Matsuura

Paper 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.

Paper Details

Date Published: 30 August 2017
PDF: 3 pages
Opt. Eng. 56(8) 080503 doi: 10.1117/1.OE.56.8.080503
Published in: Optical Engineering Volume 56, Issue 8
Show Author Affiliations
Takashi Katagiri, Tohoku Univ. (Japan)
Keisuke Yaegashi, Tohoku Univ. (Japan)
Yuji Matsuura, Tohoku Univ. (Japan)


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