Dependence of the FBG's Bragg wavelength in PCFs

摘要

The transmission properties of a uniform Fiber Bragg Grating (FBG) in a photonic crystal fiber (PCF) with C_(6v) symmetry are studied in this article. The Bragg wavelength λ_B, increases asymptotically to a particular wavelength as the number of air-hole ring or the hole pitch Λ_f increases; on the contrary, it decreases as the relative hole size (hole-pitch ratio f) increases. The coupling coefficient between the forward and backward propagating fundamental modes decreases as Λ_f increases and increases as f increases.