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Indexed by:期刊论文

Date of Publication:2011-12-15

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:Scopus、SCIE

Volume:160

Issue:1

Page Number:1268-1272

ISSN No.:0925-4005

Key Words:Photoacoustic spectroscopy; Multi-gas analysis; Tunable fiber laser; Wavelength modulation

Abstract: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.