US 12,007,632 B2
Optical isolator and light source device
Hiromichi Yoshikawa, Yokohama (JP); Naoki Matsui, Tokyo (JP); and Tomoya Sugita, Machida (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 17/594,582
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Apr. 1, 2020, PCT No. PCT/JP2020/015016
§ 371(c)(1), (2) Date Oct. 22, 2021,
PCT Pub. No. WO2020/217896, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-084610 (JP), filed on Apr. 25, 2019.
Prior Publication US 2022/0206325 A1, Jun. 30, 2022
Int. Cl. G02F 1/095 (2006.01); G02B 6/27 (2006.01); H01S 5/0239 (2021.01); H01S 5/026 (2006.01)
CPC G02F 1/0955 (2013.01) [G02B 6/2746 (2013.01); H01S 5/0239 (2021.01); H01S 5/026 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical isolator comprising:
a substrate; and
an optical waveguide provided on the substrate,
the optical waveguide including:
a first end part,
a plurality of second end parts arranged in an array,
at least one branching part located between the first end part and the plurality of second end parts, and
a portion having non-reciprocity that provides different non-reciprocal phase shift amounts between the first end part and at least two second end parts of the plurality of second end parts,
wherein the plurality of second end parts are arranged at a predetermined pitch, and the different non-reciprocal phase shift amounts regularly differ between adjacent second end parts of the plurality of second end parts.