Effect of temperature on methane gas concentration by tunable diode laser absorption spectroscopy

Yanjie Zhao; Yanfang Li; Tingting Zhang; Chang Wang; Tongyu Liu

doi:10.1117/12.968601

7 November 2012 Effect of temperature on methane gas concentration by tunable diode laser absorption spectroscopy

Yanjie Zhao, Yanfang Li, Tingting Zhang, Chang Wang, Tongyu Liu

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421AP (2012) https://doi.org/10.1117/12.968601
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

The effect of temperature on gas absorption characteristics is obvious. When the tunable diode laser absorption spectroscopy (TDLAS) technique is applied to monitor the methane gas concentration, the influence of temperature must be correction in order to measure the gas concentration accurately. Based on HITRAN database, the absorption characteristics of methane near infrared spectrum with temperature have been researched. Then a multiplexed fiber optic methane monitoring system is designed and the distributed feedback (DFB) laser is employed as laser source. The effect of the temperature on the system is emphasized. The results show that it obviously improved concentration precision by compensating retrieval concentration. It is valuable references for the gas detection in practical applications.

Citation Download Citation

Yanjie Zhao, Yanfang Li, Tingting Zhang, Chang Wang, and Tongyu Liu "Effect of temperature on methane gas concentration by tunable diode laser absorption spectroscopy", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421AP (7 November 2012); https://doi.org/10.1117/12.968601

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