公开(公告)号：US20240353697A1

公开(公告)日：2024-10-24

申请号：US18626916

申请日：2024-04-04

Applicant: FUJITSU OPTICAL COMPONENTS LIMITED

Inventor： Kensuke OGAWA

IPC: G02F1/025 ,  G02F1/015 ,  H04B10/43

CPC classification number: G02F1/025 ,  G02F1/0155 ,  H04B10/43

Abstract: An optical modulator element includes a rib optical waveguide, a first thin film, a first high-concentration doped region, and a first metal electrode. The rib optical waveguide includes a rib portion having a PN junction, a P-type slab region connected to a P-type region of the rib portion, and an N-type slab region connected to an N-type region of the rib portion. The first thin film is formed on the P-type slab region and has electron affinity different from electron affinity of a material for the P-type slab region. The first high-concentration doped region is a region in the P-type slab region, the region being at a position separate from the rib portion. The first metal electrode is electrically connected to the first high-concentration doped region positioned outward in the P-type slab region having the first thin film formed over the P-type slab region.

公开(公告)号：US20220244582A1

公开(公告)日：2022-08-04

申请号：US17701201

申请日：2022-03-22

Applicant: Fujitsu Optical Components Limited

Inventor： Kensuke OGAWA

IPC: G02F1/025 ,  G02F1/00

Abstract: An optical modulation element 100 includes a rib type optical waveguide that includes a rib portion 112 that has a P-N junction, a P-type slab area 114 that continuously extends from a P type area of the rib portion 112, and an N-type slab area 116 that continuously extends from an N type area of the rib portion 112. A first thin film 130 is formed on the P-type slab area 114 and is made of a material having an electron affinity that is different from that of the P-type slab area 114.