Wireless laser spectroscopic sensor node for atmospheric CO2 monitoring - Laboratory and field test

  • C. J. Smith
  • , S. So
  • , L. Xia
  • , S. Pitz
  • , K. Szlavecz
  • , D. Carlson
  • , A. Terzis
  • , Gerard Wysocki

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We developed a low-power, portable, wireless laser spectroscopic sensor for atmospheric CO2 monitoring. The sensor is based on tunable diode laser absorption spectroscopy with a 2-μm wavelength VCSEL as a source and wavelength modulation technique for spectroscopic signal detection. The sensor allows measurement of CO2 concentration changes with a 1σ sensitivity of 0.14 ppmv Hz-1/2. This sensor was both laboratory and field tested under varying environmental conditions. It was used to measure a soil respiration rate of topsoil in the lab and of forest floors in the field. Measurement results are compared with those of commercial non-dispersive infrared sensors and very good agreement is found.

Original languageEnglish (US)
Pages (from-to)241-248
Number of pages8
JournalApplied Physics B: Lasers and Optics
Volume110
Issue number2
DOIs
StatePublished - Feb 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • General Physics and Astronomy

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