Optical fibers offer high potential for interconnection networks (INs) for multiprocessing and multicomputing due to their ability to carry a large number of wavelengths at high transmission rates but current technology limits their use to only a few dozen wavelengths. One approach to circumvent this limitation is to arrange processing nodes (PNs) on fibers in groups and spatially separating those clusters. Grouping those clusters together in a higher level structure, or hierarchy, allows any node to communicate with any other in a large network while using only a few wavelengths. One potential hierarchy presented previously , Hierarchical Optical Ring Interconnection Network (HORN), uses a clustered hierarchical approach in which clusters consist of a set of PEs optically interconnected and these clusters are optically connected by higher level rings. As such, a highly scalable architecture is achieved, overcoming the fixed number of available wavelengths through spatial reuse of t..