title: Simultaneous measurements of CO2 and CO using a single distributed-feedback (DFB) diode laser near 1.57 μm at elevated temperatures.
abstract: A sensor using a single distributed-feedback (DFB) diode laser at 1.57 μm for the simultaneous measurement of CO(2) and CO concentration at elevated temperatures is developed. A proper line pair near 6361.250 and 6361.344 cm(-1) is chosen based on absorption strength, separation of the two lines, and isolation from interference of neighboring transitions of the major combustion gases. The concentrations of CO(2) and CO are inferred from their wavelength modulation spectroscopy (WMS) 1ƒ-normalized absorption-based WMS-2ƒ signal peak heights. The CO(2) and CO concentration measurements are within 3.3% and 5% of the expected values over the full temperature range.
authors.affiliation: College of Physics and Electronic Engineering, Xuzhou Normal University, Xuzhou 221116, P.R. China. caitingdong@126.com
authors.forename: Tingdong
authors.initials: T
authors.lastname: Cai
authors.forename: Guangzhen
authors.initials: G
authors.lastname: Gao
authors.forename: Weidong
authors.initials: W
authors.lastname: Chen
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Gao