Title :
Optimization of power transfer in multiple-waveguide couplers
Author :
Su, Ching-Chuan ; Shih, Shyh-En
Author_Institution :
Dept. of Electr. Eng., Nat. Tsinghua Univ., Hsinchu, Taiwan
fDate :
7/1/1989 12:00:00 AM
Abstract :
The eigenvalue equations for a slab multiple-waveguide symmetric coupler were solved for the case in which the coupler has more than three guides. It is shown that equal mode spacing in such an N-guide coupler can be obtained by adjusting the widths and the separations of the guides. The optimum widths and separations were calculated by solving the resulting nonlinear simultaneous equations using the Newton-Raphson method. Maximum power-transfer efficiency from one outermost guide to the other outermost guide was found
Keywords :
eigenvalues and eigenfunctions; frequency response; optical couplers; optical filters; optical waveguide theory; Newton-Raphson method; eigenvalue equations; equal mode spacing; multiple-waveguide couplers; nonlinear simultaneous equations; optimum separations; optimum widths; power transfer; power-transfer efficiency; symmetric coupler; Couplers; Eigenvalues and eigenfunctions; Frequency; Newton method; Nonlinear equations; Optical devices; Optical waveguides; Permittivity; Propagation constant; Slabs;
Journal_Title :
Quantum Electronics, IEEE Journal of
