This book provides a comprehensive treatment of the design and applications of optoelectronic devices. Optoelectronic devices such as light emitting diodes (LEDs), semiconductor lasers, photodetectors, optical fibers, and solar cells, are important components for solid state lighting systems, optical communication systems, and power generation systems. Optical fiber amplifiers and fiber lasers are also important for high power industrial applications and sensors. The applications of optoelectronic devices were first studied in the 1970's. Since then, the diversity and scope of optoelectronic device research and applications have been steadily growing.Optoelectronic Devices is self-contained and unified in presentation. It can be used as an advanced textbook by graduate students and practicing engineers. It is also suitable for non-experts who wish to have an overview of optoelectronic devices and systems. The treatments in the book are detailed enough to capture the interest of the curious reader and complete enough to provide the necessary background to explore the subject further.