This practical, comprehensive book introduces both semiconductors and integrated optics at a fundamental level, and provides in-depth derivations and analysis of key integrated optical components for more advanced study. Written from an engineer's point of view, the book emphasizes practical application; the author develops and explains the concepts and techniques needed to solve real-world problems and to understand the engineering issues involved. The book first discusses semiconductor optical material systems and then addresses the waveguide in depth. Next, it covers active devices such as lasers, modulators and detectors. Finally, there is a survey of integration and hybridization, plus the development of photonic integrated circuits. With its clear explanations and design examples, the book provides both experienced and budding engineers with the information necessary to design both the structure and fabrication process of a semiconductor integrated optical device.