Cavity ringdown spectroscopic detection of nitric oxide with a continuous-wave quantum-cascade laser

Anatoliy A. Kosterev, Alexander L. Malinovsky, Frank K. Tittel, Claire F. Gmachl, Federico Capasso, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, Alfred Y. Cho

Research output: Contribution to journalArticlepeer-review

152 Scopus citations

Abstract

A spectroscopic gas sensor for nitric oxide (NO) detection based on a cavity ringdown technique was designed and evaluated. A cw quantum-cascade distributed-feedback laser operating at 5.2 μm was used as a tunable single-frequency light source. Both laser-frequency tuning and abrupt interruptions of the laser radiation were performed through manipulation of the laser current. A single ringdown event sensitivity to absorption of 2.2 × 10−8 cm−1 was achieved. Measurements of parts per billion (ppb) NO concentrations in N2 with a 0.7-ppb standard error for a data collection time of 8 s have been performed. Future improvements are discussed that would allow quantification of NO in human breath.

Original languageEnglish (US)
Pages (from-to)5522-5529
Number of pages8
JournalApplied Optics
Volume40
Issue number30
DOIs
StatePublished - Oct 10 2001

All Science Journal Classification (ASJC) codes

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

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