The design of a prototype multichip module utilizing free-space holographic optical interconnects is discussed. This prototype incorporates GaAs laser array chips and silicon CMOS chips which are flip-chip bonded to the transparent MCM substrate. Computer generated holograms are etched onto the opposite side of the MCM substrate to form optical links between lasers and photodetectors that are integrated onto the CMOS chips. Comparisons are then performed between optical interconnects and electrical interconnects showing that for a 5cm link the dissipated power can be reduced by at least an order of magnitude, for datarates in the range of 700 MHz to 4 Ghz, by using optical interconnects.Index Terms-Multichip modules, Optical interconnects, Computer generated hologram, and CMOS photodetector.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.