Surface Plasmon Resonance on the V-Type Microstructured Optical Fiber Embedded with Dual Copper Wires

Microstructured optical fibercan be used as polarized filtersby filling the metal into the air holes in cladding to generate surface plasmon resonance. In this paper, we present a V-type birefringence microstructure optical fiberwith embedded dual copper wires that were made by the stack-drawing method, and the dual copper wires were aligned in the vertical directionsymmetrically. Through adjusting the fiber structure parameters, we found the fiber can be easily excited strong surface plasmon resonancein the S and L waveband. Then the core mode is completely coupled into the copper wires and generates the surface plasmon resonancein the y-polarized direction, to achieve the purpose of directional filtering. The experimental results are consistent with the theory.