US 12,242,143 B2
Optical device and optical communication apparatus
Yoshihiko Yoshida, Sapporo (JP); Nobuaki Mitamura, Saitama (JP); Shuntaro Makino, Kawasaki (JP); and Yoshinobu Kubota, Yokohama (JP)
Assigned to FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki (JP)
Filed by Fujitsu Optical Components Limited, Kawasaki (JP)
Filed on Mar. 21, 2022, as Appl. No. 17/699,746.
Claims priority of application No. 2021-083567 (JP), filed on May 18, 2021.
Prior Publication US 2022/0373828 A1, Nov. 24, 2022
Int. Cl. G02F 1/03 (2006.01); G02F 1/035 (2006.01); H04B 10/50 (2013.01)
CPC G02F 1/035 (2013.01) [G02F 1/0316 (2013.01); G02F 1/0327 (2013.01); G02F 2201/16 (2013.01); G02F 2202/105 (2013.01); H04B 10/501 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical device comprising:
a silicon substrate;
a ground electrode that is laminated on the silicon substrate and that has a grounding potential;
a first cladding layer that is laminated on the ground electrode;
a waveguide formed of a thin film that is laminated on the first cladding layer and that is made of a perovskite oxide with larger electro-optic effect than lithium niobate;
a second cladding layer that covers the waveguide; and
a signal electrode that is laminated on the second cladding layer and arranged at a position facing the ground electrode across the waveguide and that applies driving voltage to the waveguide.