Inspec keywords: optical couplers; directional couplers; refractive index; variational techniques; guided light propagation

Other keywords: coupling lengths; optoelectronics; rib directional coupler; strip-loaded directional couplers; spectral index method; transcendental equations; variational principle; polarised propagation constant; symmetric modes; antisymmetric modes

Subjects: Optical waveguides and couplers; Optical waveguides