US 12,153,294 B2
Optical device having dual waveguides with one being an electro-optic crystal waveguide
Shuntaro Makino, Kawasaki (JP); Teruo Kurahashi, Isehara (JP); Yoshinobu Kubota, Yokohama (JP); Yoshihiko Yoshida, Sapporo (JP); Nobuaki Mitamura, Saitama (JP); and Takehito Tanaka, Yokohama (JP)
Assigned to FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki (JP)
Filed by FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki (JP)
Filed on Sep. 19, 2022, as Appl. No. 17/947,657.
Claims priority of application No. 2021-188354 (JP), filed on Nov. 19, 2021.
Prior Publication US 2023/0161184 A1, May 25, 2023
Int. Cl. G02F 1/035 (2006.01)
CPC G02F 1/035 (2013.01) 10 Claims
OG exemplary drawing
 
1. An optical device comprising:
a substrate;
a first cladding layer that is laminated on one surface of the substrate;
a first optical waveguide that is formed in the first cladding layer at a side opposite to the substrate in the first cladding layer;
an electro-optic crystal layer that is laminated on a surface of the first cladding layer at a side opposite to the substrate;
a second optical waveguide that is formed of the electro-optic crystal layer on a surface of the electro-optic crystal layer at a side opposite to the first cladding layer; and
a second cladding layer that is laminated on a surface of the electro-optic crystal layer at a side opposite to the first cladding layer.