Quantum cascade lasers shape up for trace-gas sensing

Claire F. Gmachl, F. Capasso, R. Colombelli, R. Paiella, D. L. Sivco, A. Y. Cho

Research output: Contribution to specialist publicationArticle

4 Scopus citations


The use of quantum cascade (QC) lasers was investigated for its application in trace-gas sensing. Single-mode operation was achieved through integration of a Bragg grating into the laser waveguide which produces distributed feedback (DFB) lasers. The results show that the characteristic total tuning ranges per current sweep ranges between 0.3% to 0.5% of the emission wavelength which makes it suitable for scanning isolated absorption features of a trace gas.

Original languageAmerican English
Number of pages6
Specialist publicationLaser Focus World
StatePublished - Sep 2001

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Marketing
  • Electrical and Electronic Engineering


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