US 12,436,414 B2
Optical phase modulator
Taku Suzuki, Nisshin (JP); Tatsuya Yamashita, Nisshin (JP); Naoya Take, Nisshin (JP); and Masashige Sato, Nisshin (JP)
Assigned to DENSO CORPORATION, Kariya (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and MIRISE Technologies Corporation, Nisshin (JP)
Filed by DENSO CORPORATION, Kariya (JP); TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and MIRISE Technologies Corporation, Nisshin (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/192,791.
Claims priority of application No. 2022-065866 (JP), filed on Apr. 12, 2022; and application No. 2023-021801 (JP), filed on Feb. 15, 2023.
Prior Publication US 2023/0324723 A1, Oct. 12, 2023
Int. Cl. G02F 1/015 (2006.01); G02F 1/025 (2006.01)
CPC G02F 1/0154 (2021.01) [G02F 1/025 (2013.01); G02F 2203/50 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An optical phase modulator comprising:
a rib part extending in an extending direction, the rib part including a first rib portion of an N-type and a second rib portion of a P-type, the first rib portion and the second rib portion being arranged in a width direction that intersects the extending direction and a thickness direction of the rib part, the first rib portion and the second rib portion providing a PN junction therebetween along the extending direction;
a first slab portion being the N-type and having a thickness smaller than a thickness of the rib part, the first slab portion being disposed opposite to the second rib portion with respect to the first rib portion in the width direction, and connected to the first rib portion;
a second slab portion being the P-type and having a thickness smaller than the thickness of the rib part, the second slab portion being disposed opposite to the first rib portion with respect to the second rib portion in the width direction, and connected to the second rib portion;
a third slab portion being the P-type and having a thickness smaller than the thickness of the rib part, the third slab portion being disposed opposite to the second rib portion with respect to the first rib portion in the width direction, and connected to the first rib portion; and
a fourth slab portion being the N-type and having a thickness smaller than the thickness of the rib part, the fourth slab portion being disposed opposite to the first rib portion with respect to the second rib portion in the width direction, and connected to the second rib portion, wherein
the rib part, the first slab portion and the second slab portion provide a PN structure in a cross-section having a normal direction along the extending direction,
the rib part, the third slab portion and the fourth slab portion provide a PNPN structure in a cross-section having a normal direction along the extending direction, and
the PN structure and the PNPN structure are alternately disposed in the extending direction.