Abstract: In this study, an improved heterodyne demodulation quartz-enhanced photoacoustic spectroscopy (IHD-QEPAS) gas sensor is demonstrated, employing an erbium-doped fiber (EDF)-ring laser for the ...
Abstract: In order to solve the problems of signal attenuation and low transmission efficiency in low-orbit satellite data transmission, this paper analyzes and implements an effective modulation and ...
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