Designing analysis of the polarization beam splitter in two communication bands based on a gold-filled dual-core photonic crystal fiber

作者：Zhenkai Fan, Shuguang Li, Yuqiu Fan, Wan Zhang, Guowen An, Yajie Bao · 发表于：Chinese Physics B · 年份：2014 · DOI：10.1088/1674-1056/23/9/094212 · 被引用次数：15 · 研究领域：Photonic Crystal and Fiber Optics、Optical Network Technologies、Advanced Fiber Optic Sensors

We design a novel kind of polarization beam splitter based on a gold-filled dual-core photonic crystal fiber (DC-PCF). Owing to filling with two gold wires in this DC-PCF, its coupling characteristics can be changed greatly by the second-order surface plasmon polariton (SPP) and the resonant coupling between the surface plasmon modes and the fiber-core guided modes can enhance the directional power transfer in the two fiber-cores. Numerical results by using the finite element method show the extinction ratio at the wavethlengths of 1.327 μm and 1.55 μm can reach −58 dB and −60 dB and the bandwidths as the extinction ratio better than −12 dB are about 54 nm and 47 nm, respectively. Compared with the gold-unfilled DC-PCF, a 1.746-mm-long gold-filled DC-PCF is better applied to the polarization beam splitter in the two communication bands of λ = 1.327 μm and 1.55 μm.