Analysis and Dispersion Engineering for Generation of Ultra-flattened Dispersion in Photonic Crystal Fibers
We study the variation of group velocity dispersion with wavelength in photonic crystal fibers having triangular lattice air holes. The first ring of air holes of the fiber is considered to be infiltrated with water-glycerin solution as it is one of the most efficient liquid for photonic crystal fiber infiltration. Concentration of the solution, pitch and diameter of air holes are the parameters we seek to optimize to get flattest dispersion. In our investigation, almost flat and near zero dispersion characteristics is observed when glycerine concentration = 20%, the pitch = 2.3 µm and air hole diameter = 1.9 µm. Our finding will exhibit huge potential advantage in supercontinuum generation and various sensing applications.
KeywordsPhotonic crystal fiber Group velocity dispersion Full vectorial finite difference method
The authors are grateful to Prof. (Dr.) Somenath Sarkar, former UGC Emeritus Fellow, Department of Electronic Science, University of Calcutta for introducing us to such a fascinating field of photonics. We are also grateful to Dr. Dharmadas Kumbhakar, Professor at the Department of Electronics and Communication Engineering, Asansol Engineering College for continuous support and encouragement in various crucial stages during development of the finite difference method and other important discussions. The financial support under UGC Innovative Research Scheme of Vidyasagar University, Midnapore, West Bengal, India, is gratefully acknowledged by the second author.
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