Introduction - If you have any usage issues, please Google them yourself
A current approach in applying photonics to digital computing is to interconnect arrays of
optical logic gates in free space with regular patterns, such as perfect shuffles or crossovers.
Circuit depths and breadths are only slightly worse than when irregular optical interconnects are
used, but the optics are significantly simplified by using regular interconnects. Problems relating
to the design of digital circuits are summarized as well as approaches to solving the problems.