Patent ID: 9435961
Filing Date: 2016-09-06
CPC Classification: G02B,H01L

Claim Text:
1. An optical coupler for coupling a photonics chip to an optical fiber, comprising: a photonic chip comprising a nano-sized photonic waveguide having a width of less than one micrometer, a photonic optical diffraction surface grating in a plane of the photonic chip, and a first cladding covering the photonic waveguide and the photonic optical diffraction surface grating; and an optical coupling chip comprising a micron-sized coupling waveguide and a coupling optical diffraction surface grating embedded in a first coupling cladding and on a second coupling cladding, wherein the first coupling cladding of the optical coupling chip is connected to the first cladding of the photonic chip, wherein the optical coupling chip is configured to couple to light transmitted between the photonic chip and an optical fiber, wherein the photonic chip and the optical coupling chip are configured such that a direction of propagation of light traveling between the coupling optical diffraction surface grating and the optical fiber is in a plane of the optical coupling chip.