Utilization of the Tunability of the Lead-Salt Diode Laser for a Fast and Local Measurement of Specific Gas Density

Hiroya Sano, Ryuji Koga, Megumi Kosaka, Koji Shinohara

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In the optical gas monitoring method using a lead-salt diode laser, a spectral scanning operation of the diode brings an immunity against spectral interference which has limited the sensitivity of prevailing methods. Local, sensitive, and noncontacting features as well as quickness are attained simultaneously. Experiments for atmospheric methane showed a sensitivity of 0.3 ppm over a path length of only 1 m. Density data were obtained at every 4 s and the immunity for spectral interference was demonstrated. Theoretically, a sensitivity of 0.015 ppm for 1 m is expected.

Original languageEnglish
Pages (from-to)66-69
Number of pages4
JournalIEEE Transactions on Instrumentation and Measurement
VolumeIM-31
Issue number1
DOIs
Publication statusPublished - Mar 1982

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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