ON THE POSSIBILITY OF COMBINING EXTERNAL-CAVITY DIODE-LASER WITH PHOTOACOUSTIC DETECTOR FOR HIGH-SENSITIVITY GAS MONITORING

Authors
SNEIDER J BOZOKI Z MIKLOS A BOR Z SZABO G
Citation
J. Sneider et al., ON THE POSSIBILITY OF COMBINING EXTERNAL-CAVITY DIODE-LASER WITH PHOTOACOUSTIC DETECTOR FOR HIGH-SENSITIVITY GAS MONITORING, International journal of environmental analytical chemistry, 67(1-4), 1997, pp. 253-260
Citations number
15
Categorie Soggetti
Environmental Sciences","Chemistry Analytical
Journal title
International journal of environmental analytical chemistry → ACNP
ISSN journal
03067319
Volume
67
Issue
1-4
Year of publication
1997
Pages
253 - 260
Database
ISI
SICI code
0306-7319(1997)67:1-4<253:OTPOCE>2.0.ZU;2-5
Abstract
An external cavity diode laser is constructed and demonstrated to poss ess stable, narrow linewidth operation and wide-range tunability, thus being an ideal light source for spectrally resolved detection of abso rption lines of small molecules in the gas phase. Moreover, by using t his laser in conjunction with a photoacoustic cell, detection limit fo r optical absorption coefficient about 3.5 x 10(-8) cm(-1) achieved. T he performance of the combined system was rested by measuring overtone and combination lines of water vapour, methane and acetylene around 8 50nm. Because of its cheapness, simplicity and stability, this combine d system is a promising candidate for high sensitivity gas detection a pplications.