| CPC G02F 1/212 (2021.01) [G02F 1/225 (2013.01)] | 11 Claims |
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1. A circuit comprising:
a plurality of input ports to receive photons, the plurality of input ports including a first set of input ports and a second set of input ports;
a plurality of output ports to output photons, the plurality of output ports including a first set of output ports and a second set of output ports; and
a plurality of optical components including a plurality of active phase shifters, the plurality of optical components interconnected to form a generalized Mach Zehnder interferometer (GMZI) configured to selectably establish a first optical path between one of the input ports of the first set of input ports and one of the output ports of the first set of output ports and a second optical path between one of the input ports of the second set of input ports and one of the output ports of the second set of output ports,
wherein the first optical path and the second optical path include an overlapping portion that includes at least one of the active phase shifters and wherein a propagation direction through the overlapping portion along the first optical path is counter to a propagation direction through the overlapping portion along the second optical path.
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