A Novel Defected Elliptical Pore Photonic Crystal Fiber with Ultra-Flattened Dispersion and Low Confinement Losses

Nguyen Hoang HAI  Yoshinori NAMIHIRA  Feroza BEGUM  Shubi KAIJAGE  S.M. Abdur RAZZAK  Tatsuya KINJO  Nianyu ZOU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E90-C   No.8   pp.1627-1633
Publication Date: 2007/08/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e90-c.8.1627
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Optoelectronics
Keyword: 
photonic crystal fiber,  ultra-flattened chromatic dispersion,  confinement loss,  finite difference method,  

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Summary: 
This paper reports a novel design in Photonic Crystal Fibers (PCFs) with nearly zero ultra-flattened dispersion characteristics. We describe the chromatic dispersion controllability taking non-uniform air hole structures into consideration. Through optimizing non-uniform air hole structures, the ultra-flattened zero dispersion PCFs can be efficiently designed. We show numerically that the proposed non-uniform air cladding structures successfully archive flat dispersion characteristics as well as extremely low confinement losses. As an example, the proposed PCF with flattened dispersion of 0.27 ps/(nmkm) from 1.5 µm to 1.8 µm wavelength with confinement losses of less than 10-11 dB/m. Finally, we point out that full controllability of the chromatic dispersion and confinement losses, along with the fabrication technique, are the main advantages of the proposed PCF structure.