Chinese Optics Letters, 2007, 5 (2): 121, Published Online: Feb. 8, 2007
Fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy Download: 786次
调谐半导体激光吸收光谱 波长调制光谱 H2S传感器 开放光路 多通道 300.6260 Spectroscopy, diode lasers 300.6340 Spectroscopy, infrared 300.6380 Spectroscopy, modulation 060.2370 Fiber optics sensors
Abstract
Tunable diode laser based gas detectors are now being used in a wide variety of applications for safety and environmental interest. A fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy (TDLAS) is developed, the laser used is a telecommunication near infrared distributed feed-back (DFB) tunable diode laser, combining with wavelength modulation spectroscopy technology, a detection limit of 20 ppm.m is demonstrated. Multi-channel detection is achieved by combining optical fiber technique. An on-board reference cell provides on-line sensor calibration and almost maintenance-free operation. The sensor is suitable for large area field H2S monitoring application.
Dong Chen, Wenqing Liu, Yujun Zhang, Jianguo Liu, Ruifeng Kan, Min Wang, Xi Fang, Yiben Cui. Fiber-distributed multi-channel open-path H2S sensor based on tunable diode laser absorption spectroscopy[J]. Chinese Optics Letters, 2007, 5(2): 121.