Title :
Three-dimensional finite difference simulation of coupling behavior and loss in multimode interference devices
Author :
Weinert, C.M. ; Agrawal, N.
Author_Institution :
Heinrich-Hertz-Inst. fur Nachrichtentech. Berlin GmbH, Germany
fDate :
5/1/1995 12:00:00 AM
Abstract :
A three-dimensional finite difference method scheme for simulation of multimode interference couplers with arbitrary waveguide cross section is presented. With this method we investigate the influence of the multimode waveguide spectrum and of the access waveguide position on 3-dB coupling. These effects, which were not considered in previous theories on multimode interference structures, are shown to be important for the design of dielectric multimode waveguide devices. Taking these effects into account, fabrication tolerant 3-dB couplers with low insertion loss can be designed.<>
Keywords :
finite difference methods; light interference; optical couplers; optical losses; optical waveguide theory; simulation; 3D finite difference simulation; access waveguide position; arbitrary waveguide cross section; coupling behavior; dielectric multimode waveguide devices; fabrication tolerant 3-dB couplers; insertion loss; interference couplers; multimode interference devices; multimode waveguide spectrum; Couplers; Dielectric devices; Fabrication; Finite difference methods; Insertion loss; Interference; Optical losses; Signal processing; Waveguide discontinuities; Waveguide theory;
Journal_Title :
Photonics Technology Letters, IEEE
