Author:
Chan H. P.,Chung P. S.,Pun E. Y. B.
Abstract
Although branching waveguides are essential components in integrated-optical systems, devices using Y junctions suffer from radiation losses, particularly abrupt-bend structures with relatively large branching angles. Tsutsumi et al. showed that the transmitted power will deteriorate rapidly as the branching angle increases above 1°, owing to the strong mode conversion between guided and radiation modes.