Figure 1 | Scientific Reports

Figure 1

From: Information transfer via temporal convolution in nonlinear optics

Figure 1

FSHG optical system. (a) The field is projected into the Fourier plane using a grating and a focusing lens separated by the focal distance. Through the χ(2) interaction with the nonlinear crystal located in the Fourier plane (green line), a field at the second harmonic is generated. The total field is recombined after the second lens and grating. (b) The fundamental field entering the 4f-setup consists of a pair of pulses having a relative delay \(\Delta t=2\tau \). (c) From the temporal convolution of the fundamental pulse pair, three second harmonic pulses are generated at the output, separated by \(\Delta t=\tau \). (de) In frequency, the corresponding spectra are characterized by interference modulations with twice the period at the central frequency \(2{\omega }_{0}.\)

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