ELECTRO-OPTIC, OPTICAL, PHOTONIC, MICROPHOTONIC AND NANOPHOTONIC COMPONENTS, DEVICES, AND SYSTEMS, NAMELY, ELECTRO-OPTIC AND OPTICAL SEMICONDUCTORS FOR TELECOMMUNICATIONS AND DATA COMMUNICATIONS, MULTIPLE INTEGRATED OPTICAL DEVICES ON A SINGLE CHIP, LASERS, RESONATORS, MODULATORS, SWITCHES, MULTIPLEXERS, CROSS-CONNECTS, COUPLERS, ROUTERS, FILTERS, PHASE-SHIFTERS, AMPLIFIERS, SPLITTERS, ISOLATORS, ATTENUATORS, AND WAVEGUIDES