This volume presents information on the exciting breakthroughs and the very quickly evolving fields of research in laser science and applications.The book provides state-of-the-art knowledge of lasers and their applications, with contributions from scientists and technologists from Egyptian and international universities, institutes, ministries and industries in this highly advanced field of science and technology.The book covers topics related to laser development and applications in the following fields of research: fiber optics; remote sensing; ultra-fast phenomena; laser spectroscopy; laser photobiology; laser photochemistry; laser applications in agriculture; laser applications in engineering; laser applications in medicine; laser applications in photochemistry and photobiology; and laser basic sciences.