title: [Tunable diode laser absorption spectroscopy system for trace ethylene detection].
abstract: Tunable diode laser absorption spectroscopy (TDLAS) was characterized by ultra-narrow line width laser and wavelength modulation, which makes it possible to scan a single absorption line. TDLAS has an advantage in trace gas analysis for its high resolution, high sensitivity and quick response. The 1 626.8 nm absorption line of ethylene was selected for detecting by analyzing its absorption line characteristic. The TDLAS system was developed with a white type multi-pass cell, combined with wavelength modulation and harmonic detection. Ethylene concentration ranges from 20 to 1 200 ppmv were tested using this system. The estimated detection limit of the system is 10 ppmv.
authors.affiliation: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China. whispe@163.com
authors.forename: Wei-Dong
authors.initials: WD
authors.lastname: Pan
authors.forename: Jia-Wei
authors.initials: JW
authors.lastname: Zhang
authors.forename: Jing-Min
authors.initials: JM
authors.lastname: Dai
authors.forename: Kai
authors.initials: K
authors.lastname: Song