title: Tunable Diode Laser Absorption Spectroscopy of Carbon Monoxide Around 2.35 microm.
abstract: Novel GaInSbAs/GaSb multiple-quantum-well lasers operating near room temperature have been successfully used for tunable diode laser absorption spectroscopy in the vicinity of 2.35 mum. Continuous current tuning over a more than 150-GHz frequency range has been realized. Direct absorption measurements have been carried out on the R, R, R, and R lines of carbon monoxide. Traces of carbon monoxide at the level of 0.3 part in 10(6) in volume at 100 Torr could be detected by the low-frequency wavelength-modulation technique and an astigmatic multipass cell. These results show a potential use of these diode lasers in portable low-cost trace-pollutant sensors.
authors.forename: J C
authors.initials: JC
authors.lastname: Nicolas
authors.forename: A N
authors.initials: AN
authors.lastname: Baranov
authors.forename: Y
authors.initials: Y
authors.lastname: Cuminal
authors.forename: Y
authors.initials: Y
authors.lastname: Rouillard
authors.forename: C
authors.initials: C
authors.lastname: Alibert