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: This paper introduces a new method combining low frequency actuation signal as test stimuli and envelope detection on the RF (radiofrequency) output signal to provide a low cost mean for ...
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