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Fiber Optic Sensors IV
This paper is devoted to the description of a prototype Emission/Detection Unit, the ACCORD® Module, developed for the accurate demodulation of fiber optic sensors using spectral modulation encoding techniques. This prototype contains a static polarimetric interferometer with 4 ports to provide the four phase signals needed by the passive homodyne scheme, and uses a dual-wavelength arrangement to extend the measurement range by removing the 2ic ambiguity in the phase determination. Resolutiondoi:10.1117/12.20316 fatcat:wzmvcdw5yfhclfoz77ksjlckti