Highly birefringent photonic crystal fiber with a squeezed core and small modal area

Abstract

An index guiding photonic crystal fiber with a squeezed core is proposed and properties, including birefringence and effective modal area, are numerically analyzed using the multipole method. Numerical results show that high birefringence of 1.544×10−2 and a small modal area of 2.39μm2 are achieved at 1.55μm simultaneously. Moreover, impacts of hole spacing and hole size on birefringence and effective modal area are also investigated in detail.