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 language | English (US) |
|---|---|
| Pages (from-to) | 241-248 |
| Number of pages | 8 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 110 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2013 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
- General Physics and Astronomy