Abstract:A photonic crystal fiber (PCF) with four circular rings of air holes expanded toward the cladding region is proposed. Four circular tiny air hole rings have been used between the air holes in a regular circular PCF to achieve low dispersion (D) and confinement loss (CL). Additionally, the core region is perforated with a rectangular-shaped hole filled with an extremely nonlinear material, gallium phosphide (GaP), to achieve the desired level of nonlinearity. We achieved extremely high nonlinearity and birefrin… Show more
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