23 December 2003 CO2 monitoring with a field-deployable NIR standoff environmental sensor
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Abstract
We report standoff open path atmospheric CO2 monitoring with a field deployable, turn key system including a continuous wave (CW)distributed feedback (DFB) laser and an erbium doped fiber amplifier (EDFA) at 1.5-μm. A sensitivity of 28-ppm was achieved over 1.5-km of open air with 200-pW of received power, a 10s acquisition time, and a peak absorption cross section of 8x10-23. This sensitivity corresponds to an error in fractional absorbance of 8x10-3. Closed cell lab sensitivities are better than 3000ppm*m, an error in fractional absorbance of 5x10-4. These results have been achieved using space qualified laser components, un-cooled InGaAs detectors, off the shelf electronics in a rugged all fiber architecture.
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Benjamin R. Neff, Michael E. Dobbs, Matthew Gypson, Jeff Pruitt, William E. Sharp, "CO2 monitoring with a field-deployable NIR standoff environmental sensor", Proc. SPIE 5154, Lidar Remote Sensing for Environmental Monitoring IV, (23 December 2003); doi: 10.1117/12.503735; https://doi.org/10.1117/12.503735
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