ELLIPTICAL AND CIRCULAR STEP-INDEX FIBERS WITH CONDUCTING HELICAL WINDINGS ON THE CORE-CLADDING BOUNDARIES FOR DIFFERENT WINDING PITCH ANGLES - A COMPARATIVE MODAL DISPERSION ANALYSIS

The propagation characteristics of an elliptical step-index fiber with a conducting helical winding on the core-cladding boundary are investigated analytically and compared with those of a circular step index fiber with a conducting radial winding. Our op