hi-bi photonic crystal fiber for broadband filter realization using copper microwires

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.