This comprehensive textbook provides a detailed introduction to the basic physics and engineering aspects of lasers, as well as to the design and operational principles of a wide range of optical systems and electro-optic devices. Throughout, full details of important derivations and results are given, as are many practical examples of the design, construction and performance characteristics of different types of lasers and electro-optic devices. Covering a broad range of topics in modern optical physics and engineering, this book will be invaluable to those taking undergraduate courses in laser physics, optoelectronics, photonics and optical engineering. It will also act as a useful reference for graduate students and researchers in these fields.