The Comparisons and Analysis of Octagonal and Hexagonal Photonic Crystal Fiber for Flatness Dispersion Application

Abstract

This  paper  presents  an  analysis  and comparisons  photonic  crystal  fibers  with  both  the octagonal  and  hexagonal  structures  for  flatness dispersion  managed  applications.  Management  of chromatic dispersions in photonic crystal structures is a very  important  attempt  for  optical  transmission systems,  in  both  the linear  and  nonlinear regimes,  and for  any  optical  system  supporting  ultra-short  soliton pulse  propagation.  It  has  been  shown  through numerical  simulation  results  that  using  a  four-ring octagonal lattices structure, ultra-flattened dispersion is of  0  ±  0.50  ps/(nm-km)  within  a  1.31  to  1.70  μm wavelength range (390 nm band). Confinement loss is as low as 0.001 dB/km within a 1.31 to 1.65 μm wavelength ranges.  A  four  ring  hexagonal  lattices  structure  can assume  near  zero  ultra-flattened  dispersion  of  0  ±  0.10 ps/nm/km  in  the  wavelength  range  of  1.45  µm  to  1.75 µm (300 nm)  or, 0 ± 0.51 ps/nm/km in a 1.40 to 2.0 µm (600  nm)  with  low  confinement  loss  of  less  than  10-3 dB/m below 1.70 µm.