title: External cavity quantum cascade laser for quartz tuning fork photoacoustic spectroscopy of broad absorption features.
abstract: We demonstrate mid-infrared spectroscopy of large molecules with broad absorption features using a tunable external cavity quantum cascade laser. Absorption spectra for two different Freons are measured over the range 1130-1185 cm(-1) with 0.2 cm(-1) resolution via laser photoacoustic spectroscopy with quartz tuning forks as acoustic transducers. The measured spectra are in excellent agreement with published reference absorption spectra.
authors.affiliation: Pacific Northwest National Laboratory, WA 99352, USA. mark.phillips@pnl.gov
authors.forename: Mark C
authors.initials: MC
authors.lastname: Phillips
authors.forename: Tanya L
authors.initials: TL
authors.lastname: Myers
authors.forename: Michael D
authors.initials: MD
authors.lastname: Wojcik
authors.forename: Bret D
authors.initials: BD
authors.lastname: Cannon