点击次数：

论文类型：期刊论文

发表时间：2011-12-15

发表刊物：SENSORS AND ACTUATORS B-CHEMICAL

收录刊物：Scopus、SCIE

卷号：160

期号：1

页面范围：1268-1272

ISSN号：0925-4005

关键字：Photoacoustic spectroscopy; Multi-gas analysis; Tunable fiber laser; Wavelength modulation

摘要：A tunable fiber laser based multi-gas photoacoustic spectrometer has been developed. The spectrometer consists of a near infrared tunable fiber laser combining with a fiber amplifier, a first order longitudinal resonant photoacoustic cell and wavelength modulation mechanism. Simultaneous and continuous measurement of trace water vapor, acetylene, carbon dioxide, and carbon monoxide (H(2)O, C(2)H(2), CO and CO(2)) in gas mixtures are achieved. The gas detection limits (signal-to-noise ratio = 1) of 70 ppm at 1524.57 nm for H(2)O. 2 ppb at 1529.18 nm for C(2)H(2). 4 ppm at 1565.35 nm for CO and 4 ppm at 1572.66 nm for CO(2) were demonstrated with the spectrometer. (C) 2011 Elsevier B.V. All rights reserved.