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Non-ambiguous Evanescent-wave Fibre Refractive Index and Temperature Sensor
Abstract:The dependence of the leakage of the LP01 mode of a polished single-mode fibre section on the refractive index of an external medium provides non-ambiguous intensity modulation of the guided wave and a single-point in situ calibration of a sensor based on this refractive index, or temperature, transducing mechanism. Refractive index and temperature resolution of 10m4 and 0·1°, has been obtained over an adjustable range of 0·02 and 80°, respectively.
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