Feroza BEGUM, Yoshinori NAMIHIRA, S. M. Abdur RAZZAK, Shubi F. KAIJAGE, Nguyen H. HAI, Kazuya MIYAGI, Hiroki HIGA, and Nianyu ZOU¹

Graduate School of Engineering and Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
¹Research Institute of Photonics, Dalian Polytechnic University, No. 1 Qinggongyuan, Ganjingzi Dist, Dalian 116034, China

(Received May 11, 2008; Accepted November 25, 2008; Revised November 4, 2008)

This research presents a simple index-guiding square photonic crystal fibers (SPCFs) that has a silica core surrounded by air hole with two different diameters. It is demonstrated that the designed two-different-size hole-arrayed index-guiding SPCFs has a ultra-flattened chromatic dispersion of 0± 0.9 ps/(nm⋅km) in a wavelength range of 1.34 to 1.61 μm and low confinement loss of less than 10^-7 dB/m in a wavelength range of 1.2 to 1.7 μm. It has also been shown that the proposed SPCFs show reasonable dispersion tolerance.

Key words: photonic crystal fiber, chromatic dispersion, confinement loss, splicing loss