US 12,111,522 B2
Isolator, light source apparatus, optical transceiver, optical switch, optical amplifier, and data center
Naoki Matsui, Tokyo (JP); Hiromichi Yoshikawa, Yokohama (JP); and Tomoya Sugita, Machida (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Appl. No. 17/296,418
Filed by KYOCERA Corporation, Kyoto (JP)
PCT Filed Nov. 1, 2019, PCT No. PCT/JP2019/043137
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2020/110612, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-222905 (JP), filed on Nov. 28, 2018.
Prior Publication US 2022/0026748 A1, Jan. 27, 2022
Int. Cl. G02F 1/095 (2006.01); G02B 6/125 (2006.01); G02B 6/27 (2006.01); G02B 6/293 (2006.01); H04B 10/40 (2013.01)
CPC G02F 1/0955 (2013.01) [G02B 6/125 (2013.01); G02B 6/2746 (2013.01); G02B 6/29338 (2013.01); H04B 10/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An isolator comprising:
a first waveguide with a linear shape positioned on a substrate surface of a substrate, and a second waveguide with an annular shape positioned adjacent the first waveguide, wherein
the first waveguide and the second waveguide each include a core and a cladding,
the first waveguide and the second waveguide each are positioned along each other at least at a portion thereof in a direction of extension as a parallel waveguide,
the second waveguide includes a straight part, at least a portion of the straight part being parallel with the first waveguide as the parallel waveguide,
the first waveguide includes a first end, a second end, and a port at each of the first end and the second end for input and output of electromagnetic waves, and
the core of the second waveguide includes, in at least a portion of parts being the parallel waveguide, a non-reciprocal member in at least a portion of a cross-section intersecting a direction in which the second waveguide extends.