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Proceedings Paper

Study of optical fiber carbon monoxide gas sensor with DFB LD
Author(s): Longjiang Zheng; Xinyan Huang; Genfeng Bi
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Paper Abstract

Based on the near-infrared absorption theory, a new carbon monoxide concentration measurement system is devised. The near-infrared absorption line of carbon monoxide is chosen as the measured spectrum and a distributed feed-back laser diode (DFBLD) is used as the light source. The wavelength of the light source is locked at the carbon monoxide gas absorptive peak which is chosen at 1.567μm by light source modulation technology, and the signals are processed by lock-in amplifier. The ratio of the second-harmonic to fundamental signal is used as the output of the system to eliminate optical interference. Optical fiber is used as transmission medium, instead of traditional complex optical system, so the structure of the system would become miniaturization. Proved by examinations, high measurement sensitivity of carbon monoxide gas can be achieved in this study.

Paper Details

Date Published: 19 February 2008
PDF: 7 pages
Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 66251Y (19 February 2008); doi: 10.1117/12.791236
Show Author Affiliations
Longjiang Zheng, Yanshan Univ. (China)
Xinyan Huang, Yanshan Univ. (China)
Genfeng Bi, Yanshan Univ. (China)


Published in SPIE Proceedings Vol. 6625:
International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications

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