THEORY OF CW LIGHT PROPAGATION IN THREE-CORE NONLINEAR DIRECTIONAL COUPLERS

摘要

An exact analytic solution is obtained and analyzed for the problem of light propagation in a three-core nonlinear directional couplers with identical parallel fibres in the geometry of isosceles triangle for the Kerr-like dependence of the propagation constant on a light intensity. The transmission functions of three-core NDC have no abrupt switch regions, as it takes place in two-core NDC . This conclusion also is in accordance with the result of, based on numerical calculations of the set of nonlinear differential equations.