1. Department of Physics, Faculty of Electrical Engineering, University of Zilina in Zilina, Univerzitna 1, ?ilina, Slovakia;2. Institute of Photonic Technology Jena, D-07745 Jena, Germany
Abstract:
We propose a simple almost “all-fiber” sensor based on intermodal interference of core and cladding mode in an endlessly single mode photonic crystal fiber. Sensitivity to an external refractive index is studied experimentally and theoretically.