When first published this text was the authoritative forerunner that defined the field. Representing the latest in the field, the new edition of Optical Electronics in Modern Communications introduces students to the first principles of phenomena and devices important in the practice of laser physics, and applications based on lasers with emphasis placed on optical fiber communications. The text features real-life examples and extensive problems, and this new edition includes sections on pulse dispersion and narrowing in fibers, high speed modulation of semiconductor lasers, vertical cavity lasers, quantum optics, holographic data storage, fibre gratings, and dfb lasers. A solutions manual is available for lecturers. This text has been widely used both in the classroom and as a working guide to professionals - this new updated edition should also be widely adopted and referred to.