External cavity quantum cascade laser for quartz tuning fork photoacoustic spectroscopy of broad absorption features.
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.
Phillips
Mark C
MC
Pacific Northwest National Laboratory, WA 99352, USA. mark.phillips@pnl.gov
Myers
Tanya L
TL
Wojcik
Michael D
MD
Cannon
Bret D
BD