公开(公告)号：US11002909B2

公开(公告)日：2021-05-11

申请号：US16446010

申请日：2019-06-19

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Yusuke Saito ,  Tatsuro Kurobe ,  Tatsuya Kimoto ,  Shinichi Kamiya

IPC: G02B6/14 ,  G02B6/122 ,  G02B6/12 ,  H01S5/026 ,  G02B6/30 ,  G02B6/27 ,  H01S5/10

Abstract: An optical integrated device includes a substrate a passive waveguide region and an active region. The active region and the passive waveguide region include a first mesa structure having an upper cladding portion formed of a same material as the upper cladding layer. The passive waveguide region includes a second spot size converter having the first mesa structure, a second mesa structure having a first core portion, a lower cladding portion, and a second core portion that are formed of same materials as the first core layer, the lower cladding layer, and the second core layer, respectively. The second mesa structure has a width wider than a width of the first mesa structure, and the width of the first mesa structure continuously changes along a longitudinal direction in which light is guided through the second core portion, the width being along a direction perpendicular to the longitudinal direction.