photonic crystal fiber (PCF) made of silicon is proposed and numerically optimized with both ultrahigh birefringence and nonlinearity. By introducing an elliptical lowindex slot in the core region, one of the orthogonally polarized fundamental mo

In contrast with conventional optical fibers, photonic crystal fibers (PCF) present a diversity of new and improved features, which provide several new applications such as nonlinear fiber optics, fiber lasers, supercontinuum generation, and fibe