High-power pulsed laser diodes are employed for determining atmospheric humidity and methane. The proposed DIAL method optimises the spectral properties of laser radiation within the molecular absorption bands of 0.86-O.9prn of these major greenhouse gases. The explicit absorption spectrum is explored by computational convolution method based on reference data on spectral linestrengths modulated by the characteristic broad laser line of the selected laser diodes. The lidar scheme is ultimately compact, of low-energy consumption and suggests a large potential for ecological monitoring.The distribution of atmospheric water vapour is very important for understanding the greenhouse effect and weather phenomena. Water cycle that maintains the process of atmospheric circulation is highly dynamic and is the main energy
Investigation of new aspects of application of pulsed quantum well (In)GaAs/AIGaAs diode lasers to atmospheric spectroscopy and lidar remote sensing is reported. The presented method utilizing these powerful multichipstack diode lasers of broad radiation line is approved theoretically and experimentally for monitoring of atmospheric humidity. Molecular absorption of gas species in the investigated spectral band 0,85-0,9 im implemented by laser technology initiates further development of prospective DIAL analysis. A mobile lidar system is realized, employing optimal photodetection based on computer-operated boxcar and adaptive digital filter processing of the lidar signal in the analytical system. Aerosol profile exhibiting cloud strata in open atmosphere by testing of the sensor is demonstrative of the efficiency and high sensitivity of long-range sounding.
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