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Prediction of Modal Dispersion in Single-mode Graded Index Fibers by Chebyshev Technique

A simple method based on Chebyshev technique is reported to predict the normalised group delay and modal dispersian in single-mode optical fibers having arbitrary index profiles with examples of step and parabolic index cores. This method contains formulation of a linear relation of K 1 (W)/K 0 (W) with 1/W over a wide and practical range of W values, relevant to single-moded guidance in such fibers. Comparison with the exact numerical results shows that the proposed technique estimates the dispersion parameters excellently.