The potential of optical interconnections used in electronic computer systems continues to be a popular area of research. The main applications of optics in interconnection are not proposed to replace electrical interconnects directly, but rather to utilize the different characteristics of the optical solution making architecture changes. In this paper, some improved schemes which can be applied to interboard optical interconnects and some physical design issues and problems are also addressed briefly.
"Architectures for interboard optical interconnections", Proc. SPIE 1774, Nonconducting Photopolymers and Applications, (14 January 1993); doi: 10.1117/12.139161; https://doi.org/10.1117/12.139161