Laser & Optoelectronics Progress, Volume. 60, Issue 6, 0628011(2023)
Nanofiber Methane Sensor Based on TDLAS Technology
In this paper, we demonstrate a miniaturized nanofiber methane sensor based on tunable diode laser absorption spectroscopy (TDLAS). Based on the Beer-Lambert law, we chose a methane absorption line near 1.6 μm, performed a wavelength modulation on a distributed feedback diode laser (DFB-DL), used a lock-in amplifier to demodulate the second harmonic signal, and established a complete TDLAS system based on nanofiber. The system is used to examine the influence of different incident powers and pressures on the second harmonic signal at room temperature. We obtain the system’s pressure broadening and frequency shift coefficients through experiments. It is found that nanofibers with a smaller diameter can produce stronger absorption for methane. Moreover, the designed nanofiber sensor is a powerful tool for tracing gas measurements under low power conditions and has considerable application potential in gas species and quantitative analyses.
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Shuo Wang, Yuan Jiang, Shuaiwei Cui, Dianqiang Su, Zhonghua Ji, Wenxin Peng, Yanting Zhao. Nanofiber Methane Sensor Based on TDLAS Technology[J]. Laser & Optoelectronics Progress, 2023, 60(6): 0628011
Category: Remote Sensing and Sensors
Received: Jan. 17, 2022
Accepted: Jan. 24, 2022
Published Online: Mar. 16, 2023
The Author Email: Zhao Yanting (zhaoyt@sxu.edu.cn)