Title:
OPTICAL NON-RECIPROCAL DEVICE
Document Type and Number:
Japanese Patent JP2023172869
Kind Code:
A
Abstract:
To reduce the size of a Mach-Zehnder interferometer type optical non-reciprocal device.SOLUTION: An optical non-reciprocal device comprises: a 2×2 first coupler 1 and a 2×2 second coupler 2; a first waveguide 3 and a second waveguide 4 connecting two input-output ports of the first coupler 1 and the second coupler 2 to each other; and a first optical non-reciprocal phase shifter 5 and a second optical non-reciprocal phase shifter 6 respectively inserted into the first waveguide 3 and the second waveguide 4. The first optical non-reciprocal phase shifter 5 and the second optical non-reciprocal phase shifter 6 each include a lower clad layer 10, a waveguide core 11 positioned on the lower clad layer 10, a magneto-optical material layer 13 covering side and upper surfaces of the waveguide core 11, and an upper clad layer 12 covering the magneto-optical material layer 13 and the lower clad layer 10. Both sides of the waveguide core 11 of the first optical non-reciprocal phase shifter 5 and the second optical non-reciprocal phase shifter 6 include a plurality of recesses periodically provided in a line direction of the waveguide core 11, which forms irregularities 15.SELECTED DRAWING: Figure 3
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Inventors:
INOUE DAISUKE
ICHIKAWA TADASHI
ICHIKAWA TADASHI
Application Number:
JP2023015631A
Publication Date:
December 06, 2023
Filing Date:
February 03, 2023
Export Citation:
Assignee:
TOYOTA CENTRAL RES & DEV
International Classes:
G02B27/28; G02B6/12; G02B6/126
Attorney, Agent or Firm:
Patent Attorney Corporation Taiyo International Patent Office