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Proceedings Paper

Detection of trace amount of NO2 gas using tunable blue laser diode
Author(s): Abdulaziz Aljalal; Sameh Altanany; Khaled Gasmi; Watheq Al-Basheer; Morad Hamad
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Paper Abstract

Nitrogen dioxide, one of the main air pollutants, has strong light absorption cross section in the blue region of the optical spectrum. Recent availability of blue laser diodes provides possibility of detecting NO2 in open-air paths with very low detection limits. However, in the blue region, the sharp features of the NO2 spectrum is relatively broad with typical width of tenths of nanometer. This poses a serious challenge for implementing traditional direct or wave-modulated tunable diode laser absorption spectroscopy. In this study, we report the usage of a blue laser diode with multi longitudinal modes tuned over about one nanometer in detecting trace amount of NO2 gas. Details of the setup and its optimization will be presented along with a comparison of its performance with other NO2 detection optical methods.

Paper Details

Date Published: 16 May 2017
PDF: 7 pages
Proc. SPIE 10231, Optical Sensors 2017, 102311E (16 May 2017); doi: 10.1117/12.2264513
Show Author Affiliations
Abdulaziz Aljalal, King Fahd Univ. of Petroleum & Minerals (Saudi Arabia)
Sameh Altanany, King Fahd Univ. of Petroleum & Minerals (Saudi Arabia)
Khaled Gasmi, King Fahd Univ. of Petroleum & Minerals (Saudi Arabia)
Watheq Al-Basheer, King Fahd Univ. of Petroleum & Minerals (Saudi Arabia)
Morad Hamad, King Fahd Univ. of Petroleum & Minerals (Saudi Arabia)


Published in SPIE Proceedings Vol. 10231:
Optical Sensors 2017
Francesco Baldini; Jiri Homola; Robert A. Lieberman, Editor(s)

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