Abstract
Spectroscopic detection of carbon dioxide (CO2) in ambient air was performed using a continuous-wave mid-infrared spectrometer based on difference-frequency generation in an AgGaS2 crystal. Significant improvement in nonlinear optical frequency conversion efficiency was achieved by Gaussian beam optical design consideration. CO2 concentration was determined from direct-absorption spectral measurement.
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More From: International Journal of Infrared and Millimeter Waves
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