optics and optical communications products, namely, transmitters, receivers, switches, routers, lasers, detectors, optical fibers, light emitting diodes, optical isolators, optical circulators, compensators, polarizers, waveplates, multiplex ERS, demultiplexers, and optical filters; lightwave data links, namely receivers, transmitters, optical cables and switches; integrated circuits, computer programs for managing optical communications; electronic circuits for controlling optical communication products and lightwave data links