Optimum values of air-filling fraction for photonic crystal fibers with different configurations and fixed number of air rings

摘要

In this study, a Gaussian amp function related to the Gaussian family is employed to approximate the output intensity profile of various arrangements of air holes in photonic crystal fibers (PCFs) with a fixed number of air rings (N = 4). It is shown that d/Λ = 0.5 can be the best minimum value of air-filling fraction for all of the studied PCFs when λ = 1.35 μm, whereas, for λ = 1.55 and 1.65 μm, d/Λ = 0.6 is suitable for achieving the maximum output intensity with very low confinement loss.