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US 2025/0067936 A1Published application
Photonic Waveguide Networks
AssigneePsiquantum, Corp.
InventorsHugo V. Cable, Damien Bonneau, Hsuan-Tung Peng, Bryan S. Park, Andrzej Perez Veitia, Sara Bartolucci, Eric Dudley, Mihai Vidrighin
Life of this patent
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Abstract
An example photonic integrated circuit (PIC) includes a plurality of input ports to input light, such as a quantum state of light that comprises one or more photons, into the PIC. In addition, the PIC may include a waveguide network that includes a crossing network to combine light, and optical couplers that are coupled to the crossing network. The PIC can further include output ports to output the light.
Claims19
A photonic integrated circuit (PIC) comprising:
- a plurality of input ports to input a quantum state of light into the PIC;
- a waveguide network comprising:
- a fan-in crossing network to combine the quantum state of light;
- and
- a set of power splitters that are coupled to the fan-in crossing network;
- and
- a plurality of output ports to output the quantum state of light.
4 more elements
A method comprising:
- inputting quantum light into an input interface of a photonic integrated circuit, the input interface comprising a plurality of input ports that input into a waveguide network, the waveguide network comprising a layer of directional couplers, a fan-in crossing coupler network, and a plurality of output ports of an output interface, the layer of directional couplers being coupled to the fan-in crossing coupler network and the fan-in crossing coupler network being coupled to the plurality of output ports;
- splitting the quantum light using the layer of directional couplers;
- interfering the quantum light in the fan-in crossing coupler network, the fan-in crossing coupler network comprising a set crossing coupler layers having layer sizes arranged in a decreasing order;
- and
- outputting the quantum light at the output interface of the waveguide network, the quantum light being output from one or more of the plurality of output ports based on interference in the fan-in crossing network and which input ports of the plurality of input ports receive the quantum light.
2 more elements
Dependencies are inferred from the claim text.