An optical-interconnect arrangement is disclosed in various embodiments. In one embodiment, an optical-interconnect node includes a an optical-link section and a processor-link section. The optical-link section includes an optical combiner and an optical splitter. The combiner combines an optical signal of a local node with optical signals from other connected nodes, and the combined signals are carried on a common waveguide. Each node has an optical splitter that splits the optical signals for local processing. The processor-link section includes a demultiplexer and a transmitter. The optical signals from a splitter are input to a demultiplexer, which separates and converts the optical signals to respective electrical signals. The transmitter converts a local electrical signal to an optical signal having a wavelength associated with the node.