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.
Revised: July 2, 2007 |
Published: May 1, 2007
Citation
Phillips M.C., T.L. Myers, M.D. Wojcik, and B.D. Cannon. 2007.External Cavity Quantum Cascade Laser for Quartz Tuning Fork Photoacoustic Spectroscopy of Broad Absorption Features.Optics Letters 32, no. 9:1177-1179.PNNL-SA-53174.