公开(公告)号：US20240210620A1

公开(公告)日：2024-06-27

申请号：US18087792

申请日：2022-12-22

Applicant: Nokia Solutions and Networks Oy

Inventor： Jiabao Zheng ,  Alexandre Horth ,  Ruizhi Shi

IPC: G02B6/122

CPC classification number: G02B6/1228 ,  G02B2006/1204

Abstract: An optical device comprises a photonic integrated circuit having an optical mode coupler. The optical mode coupler optically couples a first planar optical waveguide having a first optical core at one horizontal plane to a second planar optical waveguide having a second optical core at a different second horizontal plane. The optical mode coupler comprises two or more intermediate optical layers stacked vertically between the horizontal planes of the optical cores, and intermediate optical layer comprises one or more optical rails. The optical mode coupler causes light received from the first planar optical waveguide to excite an optical mode and guide the light of the optical mode such that the optical mode substantially overlaps the first planar optical waveguide and the optical rails of at least two of the intermediate optical layers in a vertical cross-section of the photonic integrated circuit.

公开(公告)号：US12287538B2

公开(公告)日：2025-04-29

申请号：US17820673

申请日：2022-08-18

Applicant: Nokia Solutions and Networks Oy

Inventor： Ruizhi Shi ,  Ari Novack ,  Alexander Rylyakov ,  Eu-Jin Andy Lim

IPC: G02F1/035 ,  G02B6/12 ,  G02F1/21

Abstract: An apparatus includes a lithium niobate (LN) layer, and a planar electro-optical modulator having at least one hybrid optical core segment formed of a portion of the LN layer and an optical guiding rib. The optical guiding rib may be located in a top silicon layer of a silicon photonics (SiP) chip, to which a thin-film LN chip is flip-chip mounted, and may be coupled to optical waveguide cores in a first silicon core layer of the SiP chip. One or more drive electrodes are disposed between a substrate of the SiP chip and the LN layer. In some embodiments hybrid optical core segments may include silicon nitride core segments and may form an MZM configured to be differentially or dual-differentially driven.