Optical arithmetic/logic unit based on residue arithmetic and symbolic substitution
C. David Capps, R. Aaron Falk, Theodore L. Houk · Applied Optics · 1988
There has been difficulty in achieving a fully parallel, digital optical adder or multiplier. The primary obstacle is the carry operation inherent in any fixed-radix number system. The concepts of residue number representation and symbolic substitution can be combined to produce a parallel optical arithmetic/logic unit.