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ELECTRO-OPTICAL DEVICES FOR USE IN OR WITH COMMUNICATIONS SYSTEMS, NAMELY, AUDIO, VIDEO AND DATA TRANSMITTERS, AUDIO, VIDEO AND DATA RECEIVERS, OPTICAL CONNECTORS, OPTICAL ADAPTERS, OPTICAL FILTERS, OPTICAL SWITCHES, TERMINATORS, LASER RESONATORS, LASERS NOT FOR MEDICAL USE, OPTICAL WAVEGUIDES, MULTIPLEXORS, OPTICAL FIBERS, OPTICAL SPLITTERS, OPTICAL COUPLERS, ISOLATORS, GRAPHIC EQUALIZERS, CIRCULATORS, SIGNAL REGENERATORS, OPTICAL CROSS-CONNECTS, ROUTERS, AMPLIFIERS, OPTICAL DETECTORS, OPTICAL FIBER CABLES, OPTICAL MODULATORS, WAVEGUIDE PHASE-SHIFTERS, AND ASSEMBLED COMBINATIONS THEREOF; OPTICAL PREFORMS FOR USE IN MANUFACTURING OPTICAL FIBER CABLES, OPTICAL FILMS FOR USE IN LIGHT HANDLING DEVICES, OPTICAL FIBERS, OPTICAL WAVEGUIDES; AND OPTICAL NETWORK DEVICES, NAMELY, LASERS NOT FOR MEDICAL USE, OPTICAL DETECTORS, FIBER OPTIC CABLES, LASER RESONATORS, OPTICAL MODULATORS, OPTICAL CONNECTORS, OPTICAL SWITCHES, MULTIPLEXERS, ROUTERS, OPTICAL FILTERS, WAVEGUIDE PHASE-SHIFTERS, AMPLIFIERS, OPTICAL COUPLERS, OPTICAL SPLITTERS, ISOLATORS, OPTICAL EQUALIZERS, CIRCULATORS, SIGNAL REGENERATORS, OPTICAL CROSS-CONNECTS, OPTICAL ADAPTERS, TERMINATORS, LASER RESONATORS, OPTICAL WAVEGUIDES, AND ASSEMBLED COMBINATIONS THEREOF