Numerical Investigation of Octagonal Photonic Crystal Fibers with Strong Confinement Field

Kenta KANESHIMA  Yoshinori NAMIHIRA  Nianyu ZOU  Hiroki HIGA  Yasunori NAGATA  

IEICE TRANSACTIONS on Electronics   Vol.E89-C   No.6   pp.830-837
Publication Date: 2006/06/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.6.830
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Optoelectronics
photonic crystal fiber (PCF),  confinement loss,  mode field diameter (MFD),  chromatic dispersion,  effective area (Aeff),  

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In this paper, the confinement loss of octagonal photonic crystal fibers (PCFs) with an isosceles triangle lattice of air-holes are numerically investigated. Taking into account the confinement loss, the mode field diameter (MFD), the effective area (Aeff) and the chromatic dispersion of octagonal PCFs are calculated, compared to conventional hexagonal PCFs. It is found from confinement loss and MFD results that the octagonal PCFs can confine the field strongly than the hexagonal PCFs due to the different air filling fraction. Moreover, it is shown that the octagonal PCFs are obtained not only positive but also negative larger dispersion values and smaller Aeff values compared to the hexagonal PCFs.