We revisit some fundamental laws of physics governing the light propagation in linear media in order to have a better understanding of the roles of optics for parallel interconnection of digital processors. The degree-of-freedom obtainable using optical techniques can be derived from the domains of space, spatial frequency, time, temporal frequency. We pinpoint various fundamental barriers and practical limits of optics for handling interconnections. Various schemes of using optical techniques to maximize the information transmission capacity while minimizing the channel complexity are also discussed.
Yao Li, Yao Li,
"Perspectives of optics for interconnection", Proc. SPIE 2321, Second International Conference on Optoelectronic Science and Engineering '94, (5 August 1994); doi: 10.1117/12.182091; https://doi.org/10.1117/12.182091