title: Optimum values of air-filling fraction for photonic crystal fibers with different configurations and fixed number of air rings.
abstract: 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.
authors.forename: Akbar
authors.initials: A
authors.lastname: Zendehnam
authors.forename: Maryam
authors.initials: M
authors.lastname: Hosseinpour
authors.forename: Mahmood
authors.initials: M
authors.lastname: Mirzaei
authors.forename: Kambiz
authors.initials: K
authors.lastname: Hedayati