Highly Nonlinear Dual Core Photonic Crystal Fiber with Low Confinement Loss at 1.55 m Wavelength

A novel design of Dual-Core Photonic Crystal Fiber (DC-PCF) with silica-air microstructures is proposed in this paper. Nonlinearity and confinement loss of DC-PCF are evaluated by using a Full-Vectorial Finite Element Method (FV-FEM) successfully. By optimizing the geometry of three ring DC-PCFs, a high nonlinearity (52w-1km-1) and low confinement loss (0.001dB/km) can be achieved at 1.55 m wavelength when diameter to pitch ratio (d/ ) is 0.70.