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US 12,061,978 B2Granted
Optical neural network unit and optical neural network configuration
AssigneeBar-Ilan University
InventorsZeev Zalevsky, Eyal Cohen
Life of this patent
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Abstract
An artificial neuron unit and neural network for processing of input light are described. The artificial neuron unit comprises a modal mixing unit, such as multimode optical fiber, configured for receiving input light and applying selected mixing to light components of two or more modes within the input light and for providing exit light, and a filtering unit configured for applying preselected filter onto said exit light for selecting one or more modes of the exit light thereby providing output light of the artificial neuron unit.
Claims27
An artificial neuron unit for processing of input light, the artificial neuron unit comprising:
- a modal mixing unit configured for receiving input light and applying selected mixing to light components of two or more modes within the input light providing exit light, said modal mixing unit being configured as a multimode optical fiber (MMF) having a first end and a second end, and being configured for receiving the input light at the first end, enabling propagation of the input light through the MMF while mixing spatial modes of the input light propagating in respective velocities within the MMF to yield an exit light, and for outputting the exit light at the second end;
- an input optical arrangement, configured for coupling the input light into the first end of the MMF;
- a filtering unit configured for applying preselected filter onto said exit light for selecting one or more modes of the exit light, thereby providing output light of the artificial neuron unit, said filtering unit being configured as a spatial light modulator (SLM), configured for imposing a selected spatially varying modulation on the exit light to yield an output light;
- and
- a control unit configured and operable for operating said SLM and for determining spatial light modulation applied thereby, said control unit being configured for selecting spatial modulation to output light in accordance with training process of a neural processing network comprising said unit.
2 more elements
An artificial neuron network, comprising:
- one or more artificial neuron units for processing of input light, the artificial neuron unit comprising a modal mixing unit configured for receiving input light and applying selected mixing to light components of two or more modes within the input light providing exit light, and a filtering unit configured for applying preselected filter onto said exit light for selecting one or more modes of the exit light thereby providing output light of the artificial neuron unit;
- wherein said one or more artificial neuron units are arranged in one or more neuron layers along a path of propagation of an optical signal, such that the optical signal is configured to propagate through the one or more artificial neuron units between input ports of artificial neuron units of an input layer to output ports of artificial neuron units of a output layer providing output signal of said network.
An artificial neuron unit for processing of input light, the artificial neuron unit comprising:
- a modal mixing unit configured for receiving input light and applying selected mixing to light components of two or more modes within the input light providing exit light, said modal mixing unit being configured as a multimode optical fiber (MMF) having a first end and a second end, and being configured for receiving the input light at the first end, enabling propagation of the input light through the MMF while mixing spatial modes of the input light propagating in respective velocities within the MMF to yield an exit light, and for outputting the exit light at the second end,
- an input optical arrangement, configured for coupling the input light into the first end of the MMF;
- a filtering unit configured for applying preselected filter onto said exit light for selecting one or more modes of the exit light thereby providing output light of the artificial neuron unit, said filtering unit being configured as a spatial light modulator (SLM), configured for imposing a selected spatially varying modulation on the exit light to yield an output light;
- and
- a feedback route configured for receiving at least a portion of the exit light at said second end of the MMF and directing light components of said at least a portion of exit light toward said first end of the MMF for mixing said light components with at least a portion of input light, said feedback route being associated with an output port being associated with said spatial light modulator.
2 more elements
Dependencies are inferred from the claim text.