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 journalArticlepeer-review

8 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

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

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