Squeezed triangular photonic crystal fiber with high birefringence and low dispersion

Abstract

Photonic crystal fiber (PCF) with high birefringence and low dispersion is proposed in this work. Both two different sizes of elliptic air holes in the fiber cladding and a small elliptic air hole in the fiber core are used in our proposed PCF. The high birefringence is introduced on the combined effect of elliptical air holes and the squeezed lattice. The birefringence and the dispersion of this PCF have been numerically estimated by the supercell lattice method. The simulation results show that the high birefringence with the order of 10-3and the low dispersion of both x-polarized mode and y-polarized mode at the wavelength of 1.55μm can be obtained. The dependence of both the birefringence and the dispersion on structure parameters is analyzed. The simulation results show that flat birefringence and dispersion can be obtained.