Patent ID: 11886002
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An optical multiplexing circuit, comprising:
a plurality of branching units configured to each divide light output from a corresponding one of a plurality of input waveguides;
a multiplexing unit that is configured to multiplex a plurality of first beams of the light, each obtained by dividing the light by a corresponding one of the plurality of branching units;
an output waveguide that is configured to output the light multiplexed by the multiplexing unit;
a plurality of monitoring multiplexing units that are optical circuits identical to the multiplexing unit;
a plurality of first monitoring waveguides that are configured to output a plurality of second beams of the light, each obtained by dividing the light by a corresponding one of the plurality of branching units, to corresponding ones of the plurality of monitoring multiplexing units; and
a plurality of second monitoring waveguides configured to each output an output of a corresponding one of the plurality of monitoring multiplexing units.