Optoelectronic technology is the application of electronic devices that source, detect and control light, usually considered a sub-field of photonics. In this context, light often includes invisible forms of radiation such as gamma rays, X-rays, ultraviolet and infrared, in addition to visible light. Optoelectronics is based on the quantum mechanical effects of light on electronic materials, especially semiconductors, sometimes in the presence of electric fields. Optoelectronic devices are electrical-to-optical or optical-to-electrical transducers, or instruments that use such devices in their operation. Electro-optics is often erroneously used as a synonym, but is a wider branch of physics that concerns all interactions between light and electric fields, whether or not they form part of an electronic device.

In the present book, thirty-five literatures about optoelectronic technology published on international authoritative journals were selected to introduce the worldwide newest progress, which contains reviews or original researches on Optoelectronic information technology, communications, optoelectronic technology, biological science and medical optoelectronic technology, military optoelectronic technology ect. We hope this book can demonstrate advances in optoelectronic technology as well as give references to the researchers, students and other related people.