Internally excited acoustic resonator for photoacoustic trace detection

Sorasak Danworaphong, Irio G. Calasso, Andrew Beveridge, Gerald J. Diebold, Claire Gmachl, Federico Capasso, Deborah L. Sivco, A. Y. Cho

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The quantum-cascade laser can be used as an infrared source for a small portable photoacoustic trace gas detector. The device that we describe uses a quantum-cascade laser without collimating optics mounted inside an acoustic resonator. The laser is positioned in the center of a longitudinal resonator at a pressure antinode and emits radiation along the length of the resonator exciting an axially symmetric longitudinal acoustic mode of an open-ended cylindrical resonator. Experiments are reported with an 8-μm, quasi-cw-modulated, room-temperature laser used to detect N2O.

Original languageEnglish (US)
Pages (from-to)5561-5565
Number of pages5
JournalApplied Optics
Volume42
Issue number27
DOIs
StatePublished - Sep 20 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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  • Cite this

    Danworaphong, S., Calasso, I. G., Beveridge, A., Diebold, G. J., Gmachl, C., Capasso, F., Sivco, D. L., & Cho, A. Y. (2003). Internally excited acoustic resonator for photoacoustic trace detection. Applied Optics, 42(27), 5561-5565. https://doi.org/10.1364/AO.42.005561