US 11,719,964 B2
Optical device and optical communication device
Masaki Sugiyama, Kawasaki (JP)
Assigned to FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki (JP)
Filed by Fujitsu Optical Components Limited, Kawasaki (JP)
Filed on May 28, 2021, as Appl. No. 17/334,040.
Claims priority of application No. 2020-115650 (JP), filed on Jul. 3, 2020.
Prior Publication US 2022/0004031 A1, Jan. 6, 2022
Int. Cl. G02F 1/035 (2006.01); G02F 1/225 (2006.01); G02F 1/21 (2006.01)
CPC G02F 1/0356 (2013.01) [G02F 1/212 (2021.01); G02F 1/2255 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical device comprising:
a ground electrode having a ground potential;
a thin film optical waveguide formed by a thin film substrate stacked on the ground electrode;
a dielectric layer that is stacked on the thin film substrate, the position where the dielectric layer is in alignment with the thin film optical waveguide being formed into an opening;
a signal electrode embedded in the opening and that transmits a high frequency signal,
wherein a side surface of the signal electrode is covered with the dielectric layer, while a top surface of the signal electrode is exposed.