公开(公告)号：US20210318588A1

公开(公告)日：2021-10-14

申请号：US17158445

申请日：2021-01-26

Applicant: Fujitsu Optical Components Limited

Inventor： Kazuyuki WAKABAYASHI ,  Tamotsu AKASHI ,  Toshihiro OHTANI

IPC: G02F1/225 ,  G02F1/03

Abstract: An optical modulator includes an optical waveguide, a first slab and a second slab. The optical waveguide is formed by filling polymer in a slot portion formed between a first rail and a second rail disposed in parallel to the first rail. The first slab includes a first partial slab electrically connected to a first electrode and a second partial slab that electrically connects the first rail and the first partial slab. In the first slab, a thickness dimension of the second partial slab is set small compared with that of the first rail. The second slab includes a third partial slab electrically connected to a second electrode and a fourth partial slab that electrically connects the second rail and the third partial slab. In the second slab, a thickness dimension of the fourth partial slab is set small compared with that of the second rail.