COMPONENTS FOR OPTICAL NETWORKING, NAMELY LASERS, TRANSMITTERS, TRANSPONDERS, TRANSCEIVERS; OPTICAL SWITCHES, OPTICAL CROSS-CONNECTS, OPTICAL ADD/DROP MULTIPLEXERS, WAVELENGTH CONVERTERS; DISPERSION COMPENSATORS; DYNAMIC GAIN EQUALIZERS; OPTICAL FILTERS, OPTICAL RECEIVERS; OPTICAL PERFORMANCE TEST AND MEASUREMENT DEVICES, NAMELY OPTICAL POWER MONITORS, OPTICAL WAVELENGTH METERS, OPTICAL SIGNAL-TO-NOISE RATIO MONITORS, OPTICAL SPECTRUM ANALYZERS, AND FAULT ISOLATION INDICATORS
Electrical and Scientific Apparatus