title: Chemical sensing with pulsed QC-DFB lasers operating at 15.6 micrometers.
abstract: Pulsed thermoelectrically cooled QC-DFB lasers operating at 15.6 micrometers were characterized for spectroscopic gas sensing applications. A new method for wavelength scanning based on repetition rate modulation was developed. A non-wavelength-selective pyroelectric detector was incorporated in the sensor configuration giving the advantage of room-temperature operation and low cost. Absorption lines of CO2 and H2O were observed in ambient air, providing information about the concentration of these species.
authors.affiliation: Rice Quantum Institute, Rice University, Houston, TX 77251-1892, USA. akoster@rice.edu
authors.forename: A A
authors.initials: AA
authors.lastname: Kosterev
authors.forename: R F
authors.initials: RF
authors.lastname: Curl
authors.forename: F K
authors.initials: FK
authors.lastname: Tittel
authors.forename: M
authors.initials: M
authors.lastname: Rochat
authors.forename: M
authors.initials: M
authors.lastname: Beck
authors.forename: D
authors.initials: D
authors.lastname: Hofstetter
authors.forename: J
authors.initials: J
authors.lastname: Faist
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D002245:Carbon Dioxide / Q000032:analysis*; D004560:Electricity; D004784:Environmental Monitoring / Q000295:instrumentation*; D004867:Equipment Design; D005740:Gases / Q000032:analysis; D007834:Lasers; D011789:Quantum Theory; D013055:Spectrophotometry, Infrared / Q000295:instrumentation; D014867:Water / Q000032:analysis*
chemical_list: D005740:Gases; D014867:Water; D002245:Carbon Dioxide