公开(公告)号：US20200379178A1

公开(公告)日：2020-12-03

申请号：US16889164

申请日：2020-06-01

Applicant: STMicroelectronics SA

Inventor： Frederic GIANESELLO ,  Ophelie FOISSEY ,  Cedric DURAND

IPC: G02B6/27 ,  G02B6/34

Abstract: An integrated optoelectronic or optical device is formed by a polarization-splitting grating coupler including two optical waveguides, a common optical coupler and flared optical transitions between the optical coupler and the optical waveguides. The optical coupler is configured for supporting input/output of optical waves. A first region of the optical coupler lies at a distance from the flared optical transitions. The first region includes a first recessed pattern. Second regions of the optical coupler lie between the first region and the flared optical transitions, respectively, in an adjoining relationship. The second regions include a second recessed pattern different from the first recessed pattern.