Fiber Fourier optics.

  title={Fiber Fourier optics.},
  author={A. E. Siegman},
  journal={Optics letters},
  volume={26 16},
The Fourier transform of a coherent optical image can be evaluated physically by use of a single lens plus free-space propagation, thereby providing the basis for the field of Fourier optics. I point out that one can similarly evaluate the discrete Fourier transform of a sampled or pixelated optical array physically by passing the discrete array amplitudes through a network of single-mode fibers or optical waveguides. A passive optical network that evaluates the fast Fourier transform of a… CONTINUE READING
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