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A temperature sensor with two cascaded fiber Fabry-Perot interferometers (FPIs) is constructed and demonstrated, which works on envelope-based demodulation and exhibits a high temperature sensitivity. The sensor is fabricated by splicing a short segment of large mode area (LMA) fiber to a short segment of capillary tube fused with a section of single-mode fiber to form a cascaded FPI structure. Experimental...
A novel polarizer is designed by liquid filling in partial air-holes of hollow-core photonic band gap fiber (PBGF) forming an asymmetric waveguide structure, which leads to one polarization leaking out while the orthogonal polarization remains propagating along the fiber with a relatively low loss. Applied a full-vector finite-element (FEM) method, a series of polarizer structures with different water-filled...
A novel polarizer is designed by liquid filling in the partial air holes of hollow-core photonic bandgap fiber (PBGF) forming an asymmetric waveguide structure. Applied a full-vector finite-element (FEM) method, it is demonstrated that the proposed polarizer has a high polarization extinction ratio more than 35 dB.
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