
Abstract It is shown in this paper through simulation that the confinement loss of a down-doped solid-core photonic bandgap (PBG) fiber can be reduced to the level of 0.01 dB/km by only 84 air holes, with an air hole diameter to pitch ratio d / Λ =0.8 and air-filling fraction=35%. The practicality of solid-core PBG fibers is thus enhanced.
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