Thermoelectrically cooled quantum–cascade–laser–based sensor for the continuous monitoring of ambient atmospheric carbon monoxide

Anatoliy A. Kosterev, Frank K. Tittel, Rüdeger Köhler, Claire Gmachl, Federico Capasso, Deborah L. Sivco, Alfred Y. Cho, Shawn Wehe, Mark G. Allen

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

We report the first application of a thermoelectrically cooled, distributed–feedback quantum–cascade laser for continuous spectroscopic monitoring of CO in ambient air at a wavelength of 4.6 μm. A noiseequivalent detection limit of 12 parts per billion was demonstrated experimentally with a 102–cm optical pathlength and a 2.5–min data acquisition time at a 10–kHz pulsed–laser repetition rate. This sensitivity corresponds to a standard error in fractional absorbance of 3 × 10-5.

Original languageEnglish (US)
Pages (from-to)1169-1173
Number of pages5
JournalApplied Optics
Volume41
Issue number6
DOIs
StatePublished - Feb 20 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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