公开(公告)号：US11982888B2

公开(公告)日：2024-05-14

申请号：US17804261

申请日：2022-05-26

Applicant: KYOCERA Corporation

Inventor： Reona Motoji ,  Tomoya Sugita

IPC: G02F1/095 ,  G02B6/12 ,  G02B6/27 ,  G02F1/09

CPC classification number: G02F1/0955 ,  G02B6/2746 ,  G02F1/093 ,  G02B2006/12157

Abstract: A nonreciprocal waveguide includes a substrate, a light propagation path, a magnetic member, an insulating layer, and a mask. The light propagation path is positioned at the substrate along a substrate surface. The magnetic member is positioned at the substrate along part of the light propagation path in a longitudinal direction. The insulating layer is positioned at the substrate and contains the light propagation path and the magnetic member. Inside the insulating layer, the mask is positioned further away than the light propagation path from the substrate. As seen from a direction perpendicular to the substrate surface, the mask overlaps at least part of the light propagation path in a width direction from a side of the light propagation path opposite to the magnetic member in the width direction. The mask is positioned in at least a range in which the magnetic member is positioned in the longitudinal direction.