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US 12,739,037 B2Granted
Multiplexing for photonic circuits
AssigneePsiquantum, Corp.
InventorsTerence Rudolph, Hugo Cable
Life of this patent
Estimating the term…
Abstract
Circuits and methods can implement reconfigurable spatial rearrangement (also referred to as “spatial multiplexing”) for a group of photons propagating in waveguides. For instance, two sets of small optical multiplexer circuits (such as two sets of 2×2 optical multiplexer circuits or two sets of 3×3 optical multiplexer circuits) can be used to rearrange a pattern of photons on a first set of waveguides into a usable input pattern for a downstream optical circuit.
Claims15
An optical circuit comprising:
- a first set of 2×2 muxes, each 2×2 mux in the first set having two inputs and two outputs and each output of each 2×2 mux in the first set being coupled to a first crossing network;
- a second set of 2×2 muxes, each 2×2 mux in the second set having two inputs and two outputs,
- wherein each of the 2×2 muxes in the second set has inputs coupled, through the first crossing network, to the outputs of two different ones of the 2×2 muxes in the first set;
- and
- a second crossing network comprising four output waveguides that are each respectively coupled to different outputs of the second set of 2×2 muxes.
2 more elements
An optical circuit comprising:
- a first set of 3×3 muxes, each 3×3 mux in the first set having three inputs and three outputs and each output of each 3×3 mux in the first set being coupled to a first crossing network;
- a second set of 3×3 muxes, each 3×3 mux in the second set having three inputs and three outputs,
- wherein each of the 3×3 muxes in the second set has inputs coupled, through the first crossing network, to the outputs of two different ones of the 3×3 muxes in the first set;
- and
- a second crossing network that is coupled to the three outputs of each 3×3 mux in the second set of 3×3 muxes.
2 more elements
An optical circuit comprising:
- a first set of 2×2 muxes, each 2×2 mux in the first set having two inputs and two outputs, wherein a first and last output of the first set of 2×2 muxes is coupled directly to a first routing network;
- and
- a second set of 2×2 muxes, each 2×2 mux in the second set having two inputs and two outputs, wherein each of the 2×2 muxes in the second set has its two inputs respectively coupled directly to the outputs of two different ones of the 2×2 muxes in the first set, and wherein each 2×2 mux in the second set has its two outputs coupled to the first routing network.
Dependencies are inferred from the claim text.