Silicon Photonics, Deep Learning, Optics, Fourier Transform, AI.
i.e., with the phases set to 0 for each multiplication unit. We choose Y​ as an array with coefficient of index (0,0)​ equal to ​1 and all the others equal to 0​. Its Fourier transform F(Y)​ is then the 5 by 5 matrix with all its coefficients equal to ​1. Let us consider the following example