TY - JOUR T1 - Modelling Dispersion Characteristics of Circular Optical Waveguide with Helical Winding– Comparison for Different Pitch Angles TT - JF - ijop JO - ijop VL - 5 IS - 1 UR - http://ijop.ir/article-1-69-en.html Y1 - 2011 SP - 35 EP - 40 KW - Optical fiber communication KW - fiber dispersion KW - helical winding KW - helix pitch angle KW - modal cutoff. N2 - In this Article dispersion characteristic of conventional optical waveguide with helical winding at core – cladding interface has been obtained. The model dispersion characteristics of optical waveguide with helical winding at core-cladding interface have been obtained for five different pitch angles. This paper includes dispersion characteristics of optical waveguide with helical winding, and compression of dispersion characteristics of optical waveguide with helical winding at core-cladding interface for five different pitch angles. Boundary conditions have been used to obtain the dispersion characteristics and these conditions have been utilized to get the model Eigen values equation. From these Eigen value equations dispersion curve are obtained and plotted for modified optical waveguide for particular values of the pitch angle of the winding and the result has been compared. M3 ER -