Table of Contents
ISRN Optics
Volume 2014, Article ID 545961, 7 pages
Research Article

Designing an Ultra-Negative Dispersion Photonic Crystal Fiber with Square-Lattice Geometry

Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721302, India

Received 8 February 2014; Accepted 6 March 2014; Published 1 April 2014

Academic Editors: Y. S. Kivshar and S. Shi

Copyright © 2014 Partha Sona Maji and Partha Roy Chaudhuri. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We have theoretically investigated the dispersion characteristics of dual-core PCF, based on square-lattice geometry by varying different parameters. The fiber exhibits a very large negative dispersion because of rapid slope change of the refractive indices at the coupling wavelength between the inner core and outer core. The dependence of different geometrical parameters, namely, hole-to-hole spacing ( ) and different air-hole diameter ( ), was investigated in detail. By proper adjustment of the available parameters, a high negative dispersion value of 47,500 ps/nm/km has been achieved around the wavelength of 1550 nm. Our proposed fiber will be an excellent device for dispersion compensation in long-haul data transmission as being thousand times more than the available DCFs.