A fiber Bragg grating (FBG) sensor system based on a semiconductor optical amplifier connected in a ring cavity configuration is proposed. The proposed configuration produces high power signal with good extinction ratio for FBGs with /spl sim/1% reflectivity. A sensor system consists of four group of three FBGs of different wavelengths was constructed to demonstrate time- and wavelength-division multiplexing of FBG sensors.
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Chung et al. (2005) studied this question.
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