9 Optoelectonic and microelectronic components, namely diodes, laser diodes, light emitting diodes, transistors, integrated circuits, semiconductor chips, high frequency semiconductor chips, semiconductor chips for integrated circuits; optical amplifiers; photodetectors; optical switches; optical filters; optical communication systems comprised of laser transmitters, receivers and the connective media, such as optical fiber or waveguides; wavelength division multiplexing systems comprised of laser transmitters, multiplexers, connective media such as optical fiber or waveguides, demultiplexers, switches, and receivers; semiconductor wafers, silicon wafers, gallium nitride wafers, epitaxial wafers, wafers with semiconductor layers; apparatus and instruments for signal measurement, generation and control, namely mode locked lasers