Short length polarization splitter based on dual core photonic crystal fiber with hexagonal lattice
Abstract A short length polarization beam splitter is designed. It is based on a simple structure dual core photonic crystal fiber (DC PCF) and possesses short length. We research the effects of DC PCF structure parameters on performances of the splitter by finite element method (FEM) The results show that the extinction ratio of the 249 m m long splitter can reach 50.7 dB at the communication wavelength of 1.55 m m Furthermore, the extinction ratio of the 506 m m long splitter can reach 61.6 dB at the communication wavelength of 1.31 m m The bandwidths of extinction ratio better than 20 dB are about 17 nm and 12 nm at wavelength of 1.55 m m and 1.31 m m respectively.