Analyze of the Dispersion Characteristics of Various Designs Photonic Crystal Fibers by Effective Index Method

Analysis of dispersion properties of photonic crystal fibers, in the development of optical communication systems is considered as one of the key points. Systematic knowledge of the special guiding properties of photonic crystal fibers (PCFs) permits the achievement of qualitatively novel dispersion curves. In this paper, by the effective index method, the dispersion characteristics of PCFs for various structures have been analyzed. Further, scalar effective index and full vector effective index methods are represented. In fact, the dispersion properties of these fibers are analyzed for third-order dispersion: zero dispersion at any wavelength, nearly zero ultra-flattened dispersion, and a very high negative chromatic dispersion for various designs of PCFs. Also, the influence of normalized air hole size and separation between them on zero dispersion wavelengths is studied.