Title :
Sensitive, multipoint gas detection using TDM and wavelength modulation spectroscopy
Author :
Ho, H.L. ; Jin, W. ; Demokan, M.S.
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Kowloon, China
fDate :
7/6/2000 12:00:00 AM
Abstract :
The authors report on the use of time division multiplexing coupled with wavelength modulation of an external cavity laser for sensitive, multipoint gas detection. A three-sensor ladder-topology acetylene system is experimentally demonstrated with a detection sensitivity of 150 ppm (25 mm gas cells) for a time constant of 300 ms and -30 dB crosstalk between the sensors
Keywords :
modulation spectroscopy; 300 ms; TDM; acetylene; crosstalk; detection sensitivity; external cavity laser; gas detection; multipoint gas detection; sensitive multipoint gas detection; three-sensor ladder-topology acetylene system; time constant; time division multiplexing; wavelength modulation; wavelength modulation spectroscopy;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000886
