公开(公告)号：US20200081202A1

公开(公告)日：2020-03-12

申请号：US16126841

申请日：2018-09-10

Applicant: Lumentum Operations LLC

Inventor： Lance THOMPSON ,  Shibnath PATHAK

IPC: G02B6/42

Abstract: An optical device may include an optical coupling structure to couple a silicon-germanium photodetector to an integrated optics circuit. The optical coupling structure may comprise a silicon waveguide. The silicon waveguide may be tapered such that a thickness of the silicon waveguide at a first end of the optical coupling structure is smaller than a thickness of the silicon waveguide at a second end of the optical coupling structure, and may be tapered such that a width of the silicon waveguide at the first end is smaller than a width of the silicon waveguide at the second end. The optical coupling structure may include a silicon-nitride waveguide that covers the silicon waveguide, and is tapered such that a width of the silicon-nitride waveguide at the first end is smaller than a width of the silicon-nitride waveguide at the second end. The optical coupling structure may include a silica waveguide.