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公开(公告)号：US12189220B2
公开(公告)日：2025-01-07
申请号：US17701201
申请日：2022-03-22
Applicant: Fujitsu Optical Components Limited
Inventor： Kensuke Ogawa
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.
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