Optical dispersion curves of two metal-clad lightguides having double convex lens core cross sections

Using Goell's point-matching method under the weak guidance condition, moda l characteristic equations have been derived for two lightguides with doubl e convex lens-shaped core cross sections. In one ease, both of the boundari es are taken as conducting, and in the other ease, we consider only one sid e as conducting. In both cases, dispersion curves are obtained and compound . (C) 2000 John Wiley & Sons, Inc.