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

6 Scopus citations


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
Issue number2
StatePublished - Feb 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)


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