pp. 2039-2048
S&M1659 Research Paper https://doi.org/10.18494/SAM.2018.1958 Published: September 13, 2018 Fiber Optic Methane Sensing System Based on the Temperature-Tunable Distributed Feedback Laser [PDF] Shang-hui Xiao, Yi Jiang, and Jun Tang (Received April 6, 2018; Accepted June 11, 2018) Keywords: fiber optic sensors, methane measuring, absorption spectroscopy, wavelength scanning
A fiber optic methane sensing system based on the temperature-tunable distributed feedback (DFB) laser is experimentally demonstrated. Two laser diodes (LDs) with different wavelengths are used in the system. One LD operates in the wavelength scanning mode, and the other LD is used as the reference beam to eliminate the fluctuation of light intensity. By comparing the intensities of the two wavelengths during wavelength scanning, we can determine methane content. Experimental results show that a measurement resolution of 0.038% can be reached. The obtained measuring system has good properties of high precision, low cost, and high reliability.
Corresponding author: Shang-hui XiaoCite this article Shang-hui Xiao, Yi Jiang, and Jun Tang, Fiber Optic Methane Sensing System Based on the Temperature-Tunable Distributed Feedback Laser, Sens. Mater., Vol. 30, No. 9, 2018, p. 2039-2048. |