Patent ID: 11747559

Abstract:
Disclosed is a photonic integrated circuit (PIC) structure including: a first primary waveguide, which has a first main body and a first end portion that is tapered; at least one supplemental waveguide positioned laterally adjacent to and extending beyond the first end portion of the first primary waveguide; and a second primary waveguide, which has a second main body and a second end portion that at least partially underlays/overlays the first end portion of the first primary waveguide and the supplemental waveguide(s). The arrangement the end portions of the primary waveguides and the supplemental waveguide(s) allows for mode matching conditions to be met at multiple locations at the interface between the primary waveguides, thereby creating multiple signal paths between the primary waveguides and effectively reducing the light signal power density in any one path to prevent or at least minimize any power-induced damage.