Communication cables, namely fiber optic cable and hybrid cables incorporating fiber optic cable, and connectors therefor; optical fiber, dispersion-compensating modules, metallized pigtails, optical connectors, optical amplifiers, optical modulators, sensors, lasers for non-medical use, optical attenuators, optical multiplexers, optical adaptors, optical terminators, jumpers, and fiber management frames, optical distribution and termination boxes, splitters, fiber optic splice closures; and telecommunications systems, comprising optical fiber and/or optical fiber cable, optical amplifiers, optical transmitters and optical receivers.