OPTICAL COMPONENTS FOR USE IN FIBER OPTIC COMMUNICATION NETWORKS, NAMELY, WAVE GUIDES, THIN FILM BAND PASS FILTERS, GAIN FLATTENING FILTERS, DENSE WAVELENGTH DIVISION MULTIPLEXING DEVICES, NAMELY OPTICAL SIGNAL GENERATORS, OPTICAL SIGNAL RECEIVERS, OPTICAL SIGNAL TRANSMITTERS, OPTICAL SIGNAL DISTRIBUTORS, OPTICAL SIGNAL CONVERTERS, OPTICAL ISOLATORS, OPTICAL SIGNAL AMPLIFIERS, OPTICAL CIRCULATORS, OPTICAL INTERLEAVERS, OPTICAL COUPLERS, OPTICAL LASERS, AND OPTICAL COMPONENTS WITH ANTI-REFLECTIVE COATINGS
Electrical and Scientific Apparatus