Photo from Scientific Research

Charge-coupled device images demonstrating the operation of the Fourier gate as a multioutcome measurement of classical macro-pixel modes prepared in basis = 1 in dimensions d = {2, 3, 5}. Note that although the input modes have the same amplitude for a given d, they are orthogonal in phase (not seen in the intensity images). L, lens; F, filter; HWP, half-wave plate.

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