Abstract

We present a novel and robust design for a photonic crystal fiber with flattened dispersion, a highly nonlinear coefficient, and low confinement loss for its dual concentric core structure. The proposed fiber has a modest number of design parameters. Analysis results show that the proposed eight-ring photonic crystal fiber is obtained with a nonlinear coefficient greater than 33W1km1 and a near-zero dispersion slope of 7.828×104ps/nm2/km at 1550nm. Ultraflat dispersion with a value between 1.380 and +0.9860ps/nm/km and a superlow-order confinement loss of 104dB/km are simultaneously obtained ranging from 1400 to 1625nm. For practical fabrication, the influence of random imperfections of airhole diameters on dispersion and nonlinearity is discussed to verify the robustness of our design.

© 2010 Optical Society of America

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