THEORETICAL ANALYSIS AND DISPERSION CURVES OF AN ANNULAR LIGHT GUIDE WITH A CROSS-SECTION BOUNDED BY TWO PIET-HEIN CURVES

Abstract We theoretically investigate the modal dispersion characteristics of a new annular lightguide with a coordinates (ρ,ξ,η) for this unconventional structure and impose the boundary conditions under the weak guidance condition. The modal eigen value equation has been derived analytically. After this, we show numerical results in the form of dispersion curves. Keywords: