Novel vertical directional couplers, consisting of graded-index planar waveguides, were realised by field-assisted K+-ion exchange in glass. Normal mode measurements of the coupling length are compared to results based on numerical simulations of the diffusion equation and the beam propagation method.

doi.org/10.1049/el:19920851
Electronics Letters
Department of Electronics

Albert, J, Noutsis, P.C., & Yip, G.L. (Gar Lam). (1992). Novel vertical directional coupler made by field-assisted ion-exchanged slab waveguides in glass. Electronics Letters. doi:10.1049/el:19920851