公开(公告)号：US11226451B2

公开(公告)日：2022-01-18

申请号：US16750942

申请日：2020-01-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jaegyu Park ,  Gyung Ock Kim ,  Jiho Joo

IPC: G02B6/35 ,  G02B6/12 ,  G02B26/08 ,  G02B26/06

Abstract: A 3D optical switch for transferring an optical signal between a plurality of layers of an optical integrated circuit, which comprises: a first optical coupler for distributing the optical signal input to a first optical waveguide deployed in a first layer among the plurality of layers to a second optical waveguide deployed in a second layer different from the first layer; a phase shifter for changing a phase of a first optical signal in the first optical waveguide passing through the first optical coupler and a phase of a second optical signal in the second optical waveguide distributed by the first optical coupler; and a second optical coupler for combining the first optical signal of which the phase is changed and the second optical signal of which the phase is changed is provided.