Patent ID: 11966083
Assignee: KDDI CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A communication device comprising:
a transmission unit configured to transmit a transmission optical signal;
a reception unit configured to receive a reception optical signal;
a transmission port connected to a first core;
a reception port connected to a second core;
an isolator connected to the transmission unit; and
an optical coupler connected to the isolator, the reception unit, the transmission port, and the reception port, wherein
the first core and the second core allow only optical signals that propagate in mutually different directions to pass therethrough
the isolator is configured to allow the transmission optical signal transmitted from the transmission unit to pass therethrough, but block an optical signal that travels toward the transmission unit, and
the optical coupler is configured to output the transmission optical signal transmitted from the transmission unit via the isolator to each of the transmission port and the reception port, output the reception optical signal transmitted from the reception port to each of the reception unit and the isolator, and output the reception optical signal transmitted from the transmission port to each of the reception unit and the isolator.