USEFUL FORMULAS FOR MULTIMODE INTERFERENCE POWER SPLITTER COMBINER DESIGN

Simple design formulas for optical power splitters with an arbitrary n umber of output ports (1 X N) are presented. They are obtained using a model based on the interference of the confined modes of a multimode wide section. These formulas provide the correct dimensions of the dev ice, plus the output phase relations and output guides location. The a ccuracy of these formulas is further demonstrated by the design and fa brication of a buried heterostructure waveguide power splitter on InP, compatible with laser integration, that yield compact and low inserti on losses devices.