Mid-infrared photoacoustic spectroscopy of solids using an external-cavity quantum-cascade laser

Optics Letters
Qing Wen, Kirk H Michaelian

Abstract

We describe the use of a pulsed external-cavity quantum-cascade laser (EC-QCL) for the acquisition of mid-IR photoacoustic (PA) spectra of solids. The EC-QCL employed in this work operates from 990 to 1075 cm(-1) (9.30-10.10 microm). A gas-microphone PA cell was used as the detector, and the signal was demodulated using a lock-in amplifier. PA EC-QCL spectra of solids display bands significantly narrower than those in corresponding PA Fourier transform infrared spectra.

References

Jul 11, 2006·Proceedings of the National Academy of Sciences of the United States of America·Michael PushkarskyC Kumar N Patel
Dec 14, 2006·Proceedings of the National Academy of Sciences of the United States of America·Michael B PushkarskyC Kumar N Patel
Nov 23, 2007·Optics Letters·G TotschnigA Müller

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Citations

Jul 5, 2012·The Review of Scientific Instruments·M Dehghany, K H Michaelian
Jun 25, 2016·Applied Spectroscopy·Logan S MarcusPaul M Pellegrino
Apr 12, 2017·Sensors·Joo Yong SimBong Kyu Kim
Feb 6, 2017·Applied Optics·Ellen L Holthoff, Paul M Pellegrino

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