Optical receivers; Optical transceivers; Optical apparatus, namely, optical communication apparatus; Optical instruments, namely, optical transmitter, optical receivers, optical transceivers, optical transponders; Optical semiconductor amplifiers; Optical condensers; Optical filters; Optical fibres; Optical encoders; Optical cables; Electro-optical sensors; Optical sensors; Optical readers; Optical connectors; Optical semiconductors; Optical electronic components, namely, lasers, detectors, m...