Investigation of high birefringence and negative dispersion photonic crystal fiber with hybrid crystal lattice

Abstract

Aiming at the requirements of high birefringence and negative dispersion in fiber-optic communication and sensing systems, a novel type of photonic crystal fiber (PCF) is proposed. In this structure, rectangular holes are arranged as hybrid lattice in the core and two bigger air holes symmetrical in the first cladding layer are added to gain high birefringence. Simulation results show that this kind of PCF exhibits high birefringence with a level of 10−2, which will obtain better polarization. The negative dispersion is obtained over a wide wavelength range simultaneously, which has important applications in designing of dispersion compensation fibers.