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A simultaneous relative humidity (RH) and temperature sensor based on an optical fiber Fabry–Perot interferometer is proposed and experimentally demonstrated. This sensor is constructed by splicing a short length of photonic crystal fiber (PCF) to single mode fiber and coating an ultrathin polyvinyl alcohol film to the PCFs cleaved surface. The total length of this sensing head is only $\sim 110~\mu $ ...
A hybrid fiber interferometer sensing configuration for ambient refractive index (RI) and high temperature measurements is proposed and experimentally demonstrated, which is constructed by splicing a short section of photonic crystal fiber to one output port of a 22 50:50 fiber-optics coupler with controllable offset. The reflected spectrum pattern of the proposed interferometer presents...
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