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Three proposals of large pitch (Λ=5µm) photonic crystal fibers (PCFs) are studied. The effect of air hole radius on the properties of the fundamental mode of these fibers are considered. All the parameters of the proposed structured were kept constant except the hole radius were varied 0.5, 0.8, and 1.0μm for the PCF1, PCF2 and PCF3 respectively.

The Effect of Hole Radius on The Properties of Large Pitch Photonic Crystal Fiber