This book deals with semiconductor optoelectronic devices and components that find a major application in optical fiber communication including those which find other non-telecommunication applications. The primary focus is on the basic understanding of optical communication systems and their application in modern low-loss and high-bandwidth transmission systems as an alternative to conventional electrical communication systems.Salient Features˜… A strong emphasis on the fundamental understanding of the operation of various optoelectronic devices and their applications in optical fiber communication˜… Extensive coverage of semiconductor optoelectronic devices for both telecommunication and non-telecommunication applications˜… Exposure to design and analysis involving generation, transmission, and reception of optical signals for optical fiber communication systems both for analog and digital modes˜… Introduction to advanced optical technology including integrated optics, optical networks, WDM concepts, coherent optical communication ˜… Basic exposure to practical measurement and testing of optical fiber systems˜… A comprehensive list of references to the original works related to the evolution of optical fiber communication systems ˜… Numerous solved examples on the subject for better understanding and unsolved problems for self“evaluation