Sensitive, multipoint gas detection using TDM and wavelength modulation spectroscopy

H. L. Ho, Wei Jin, M. S. Demokan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)1191-1193
Number of pages3
JournalElectronics Letters
Issue number14
Publication statusPublished - 6 Jul 2000

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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