title: Ultrabroadband polarization splitter based on three-core photonic crystal fibers.
abstract: An ultrabroadband polarization splitter based on three-core photonic crystal fiber (PCF) is proposed. Two fluorine-doped cores and an elliptical modulation core are introduced to achieve an excellent performance and an ultrawide bandwidth. Numerical results demonstrate that the polarization splitter based on three-core PCF has an extinction ratio as low as -20 dB bandwidth as great as 400 nm covering almost all communication bands (O, E, S, C, and L bands). Its Gaussian-like mode-field distributions and suitable effective mode areas make it highly compatible with the standard single-mode fibers. Due to using a uniform size of circular air holes and only one elliptical central air hole, the difficulty of fabrication can be decreased to some extent.
authors: School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China.
authors: Wenliang
authors: W
authors: Lu
authors: Shuqin
authors: S
authors: Lou
authors: Xin
authors: X
authors: Wang
authors: Liwen
authors: L
authors: Wang
authors: Ruijuan
authors: R
authors: Feng