Figure | A passive optical nonlinearity that enables neuron-like activation. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | A passive optical nonlinearity that enables neuron-like activation.

Caption

Figure | A passive optical nonlinearity that enables neuron-like activation. (a) Device images and measurement configuration. (b) The waveguide is engineered to efficiently convert light at telecom wavelengths. (c) As the input power increases, the signal shows a clear nonlinear response, closely resembling the sigmoid activation used in neural networks. (d) The second harmonic conversion efficiency approaches 80% in continuous-wave condition. (e) Modeling indicates that the nonlinear process can support extremely high operating speeds. (f) Experiments with femtosecond optical pulses confirm the same activation behavior at lower energy.

Credit

Wujie Fu et al.

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CC BY

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