Simultaneous dual-parameter measurement based on dual-channel surface plasmon resonance in photonic crystal fiber

A PCF-based dual-parameter sensor is investigated based on dual-channel Surface Plasmon Resonance (SPR). The sensing property can be manipulated just by optimizing the cross-section and selectively infiltrating the cladding air-holes with magnetic fluids (MF). Based on the dependence of the MF refractive index (RI) on temperature and magnetic field, the sensitivity of the spectral response to these two parameters can be characterized by finite element method (FEM). The proposed structure provides a new dual-parameter measurement method to eliminate the cross sensing effect.