Dispersion compensating photonic crystal fiber using double-hole assisted core for high and uniform birefringence

A novel photonic crystal fiber design is presented. The design provides broadband high and uniform birefringence, large negative dispersion and low confinement loss. The fiber is based on double-hole assisted core in the conventional square lattice cladding. For the proposed PCF, high and uniform birefringence of 7.5 × 10−3, the negative dispersion of −150 ps/(nm km) and an extremely low confinement loss can be obtained over E+ S + C + L + U (1380 ∼ 1780 nm) wavelength bands.