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Scanning the absorption spectral line of water vapor through wavelength around 1368.597nm is successfully used to measure the value of micro-moisture content. The synchronous superposition average of original signal algorithm based on labview is innovated and applied to detecting weak spectrum absorption signal instead of low pass filter. Two data processing methods are used to get the concentration...
A Distributed feedback fiber laser (DFB-FL) wavelength shift interrogation scheme based on C2H2 absorption spectrum is demonstrated in this paper, the interrogation scheme takes advantage of the transformation the wavelength shift to intensity change of the light by gas absorption spectrum. Interrogation the wavelength shifting of the DFB-FL by C2H2 absorption line around 1535nm is taken as example...
A voice recording system based on distributed feedback fiber laser (DFB-FL) is presented in this paper. We record and recover voice signal by interrogating the DFB-FL wavelength shift, derived from the change in the external environment around the DFB-FL. Voice recording is demonstrated using both unifrequent voice signal and human voice respectively, and satisfying results have been obtained. The...
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