Optical expanders with applications in optical computing.

@article{Reif1993OpticalEW,
  title={Optical expanders with applications in optical computing.},
  author={John H. Reif and A. Yoshida},
  journal={Applied optics},
  year={1993},
  volume={32 2},
  pages={
          159-65
        }
}
An optical system called the optical expander is described and investigated. The optical expander electro-optically expands an optical Boolean pattern encoded in d bits into an optical pattern of size N bits. It is assumed that d is equal to c log(2)N for some constant c, and each expanded pattern is orthogonal to the others. Two different architectures to implement the optical expander are described: one uses an optical matrix-vector multiplier and an array of N threshold devices; the other… 
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