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Described is research work aimed at the development of techniques for frequency tripling laser radiation which is incident on mixtures of metal vapors and inert gases. Principal accomplishments of the program include: the demonstration of the first nonlinear optical technique in the vacuum ultraviolet region of the spectrum; the generation of kW peak powers at 1773 A, 1520 A, and 1182 A; the development of a very general analysis for studying the potential conversion efficiency in the alkali metal-inert gas system; and most recently the proposal and demonstration of the very simple technique of third harmonic generation in mixtures of inert gases. (Author).
Nonlinear Optical Parametric Processes in Liquids and Gases focuses on the parametric processes that occur in liquids and gases. This book examines the mathematical results that are intended mainly for their usefulness in quantifying the physical interpretations of the various concepts to actual systems. Comprised of six chapters, this text starts with a discussion on the nonlinear optical processes, and then explores the basis for nonlinear optical interactions. This book describes the various third-order frequency mixing processes and the basic properties of nonlinear interactions, including phase matching and resonant enhancement. Other chapters consider the processes of frequency mixing and harmonic generation that are used as illustrations of the basic principles. The final chapter explores the applications of several nonlinear optical interactions, with a focus on the use of nonlinear optical processes to control the propagation of optical waves or to obtain information about a material system. This book is intended for researchers and readers engaged in the study of university-level mathematics, electromagnetic theory, and atomic physics.
We have carried out a series of experiments to study collisional and radiative processes in alkali metal and alkaline-earth vapors. Our principal interest has been to understand fundamental atom-atom, atom-molecule, and atom- light interactions in order to model alkali diatomic and alkaline-earth excimer systems for possible laser applications. During this funding period, we have concentrated on collisional excitation transfer, quenching and diffusion processes involving the metastable 6s5dD sub J levels of barium. We have also investigated alkali and alkaline-earth vapors as media for observing low threshold nonlinear optical processes.
This selection of papers in the field of nonlinear optics contains reprints of original research, and general reviews written since 1960 up to the present. Brief comments by the author place each paper in a historical context of the evolution of nonlinear optics. Papers are selected from a more comprehensive bibliography either on the basis of their influence on subsequent developments or because they were originally published in journals or conference proceedings which are less easily accessible.