Abstract

In this paper, several kinds of photonic crystal flbers (PCFs) have been proposed and characterized. Two types of PCF structures have been proposed, air holes in silica or silica rods in air in a triangular lattice around the core. It has been shown that by reshaping the cladding holes, varying the diameters of the holes in one or two rows around the core or changing the refractive index of the holes, difierent types of specialty flbers, such as dispersion shifted flbers (DSFs), non-zero dispersion shifted flbers (NZ-DSFs), dispersion ∞attened flbers (DFFs), dispersion compensating flbers (DCFs), and polarization maintaining flbers (PMFs), can be designed. The PCF core is silica to support the propagation of lightwave by total internal re∞ection (TIR) in the third telecommunication window. The chromatic dispersion, conflnement loss and modal birefringence of the proposed specialty flbers have been numerically derived.

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