It is expected that ongoing advances in optics will revolutionise the 21st century as they began doing in the last quarter of the 20th. Such fields as communications, materials science, computing and medicine are leaping forward based on developments in optics. The scope includes UV, VUV and X-Ray lasers, visible, solid-state, semiconductor and infrared gas lasers, FEL and ultrashort laser pulses, visible and infrared optical materials, infrared and imaging detectors, optical fibers and fiber optic sensors, holography, laser spectroscopy and photochemistry, high resolution lithography for optoelectronics and more. This book presents leading new research in the field.