Integrated circuits; integrated optical circuits; semiconductor substrates featuring epitaxial layers; integrated circuits for radio frequency signal processing; monolithic microwave integrated circuits; electro-optical components in the nature of laser modules; vertical-cavity surface-emitting lasers; electro-optical modulators; semiconductor optical diode chips; surface- and edge-emitting semiconductor diodes; semiconductor diode arrays; photodiodes, laser bars and stacks; optical pumps for lasers; pump lasers; power integrated circuits, namely integrated circuits for the control of electrical power.