The Novel Y-Branch With Two Reflectors

A novel Y-branch waveguide with two reflectors is proposed. The normalized transmitted power for the branching angle of 50°is greater than 70%, which is higher than conventional Y-branch with such wide angle.     

Low Loss S-Bend Structure With Tapered Curved Waveguides

A novel S-bend with tapered curved waveguides is proposed. The normalized transmitted power is greater than the conventional bend with weakly guided waveguides. Small size and low loss can be reached by the proposed S-bend.     

Bent waveguide with a high index reflector on LiNbO3

An abrupt bend structure with a corner reflector on LiNbO₃ is proposed. In the proposed structure, a region whose refractive index is higher than that of the substrate is placed at the corner of the bend. The interface between the substrate and the high index region is used as a reflector for the guided wave. The calculated normalized transmission power is about 94% even when the bend angle is 10.