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