This paper presents a highly birefringence (Hi-Bi) photonic crystal fiber (PCF)-based single-polarization filter, which consists of copper microwires. Copper is chemically stable and the use of microwires is benefit to fabricate than any metal-coated PCF. The filter characteristics are inspected by the full-vector finite element method (FEM). The proposed filter can filter out y-polarized mode, while the x-polarized mode can be guided. The confinement loss of the y-polarized mode at the wavelength of 1.31 μm is achieved of 696.79 dB/cm, while the x-polarized loss is only 4.34 dB/cm. According to numerical results, 20 dB bandwidth of the proposed filter with a maximum value of crosstalk of 601.37 dB is achieved of 650 nm that range from 1.1 to 1.75 μm. Furthermore, the insertion loss of the guided mode (x-polarization) is as low as 0.142 dB for 1 mm of fiber length. Moreover, by optimizing the structural parameters, it has shown that the proposed filter can be effective at any wavelength at the optical communication window.

本文提出了一种基于高双折射（Hi-Bi）光子晶体光纤（PCF）的单偏振滤光片，该滤光片由铜微丝组成。铜在化学上是稳定的，与任何金属涂层的PCF相比，使用微丝制造更有利。滤波器特性通过全矢量有限元方法（FEM）进行检查。所提出的滤波器可以滤除y偏振模式，而x偏振模式可以被引导。y偏振模在1.31μm波长处的限制损耗达到696.79 dB / cm，而x-极化损耗仅为4.34 dB / cm。根据数值结果，所提出的滤波器的20 dB带宽在650 nm处实现，串扰的最大值为601.37 dB，范围为1.1至1.75μm。此外，对于1mm的光纤长度，引导模式的插入损耗（x偏振）低至0.142dB。而且，通过优化结构参数，已经表明，所提出的滤波器可以在光通信窗口的任何波长下都有效。