Abstract
With the emergence of highly nonlinear materials such as liquid crystals, organic polymers, semiconductors and multiple quantum wells, and photorefractive crystals (and semiconductors), various nonlinear optical processes are currently under intense rescrutiny from both theoretical and applied standpoints. In particular, the process of beam amplification via two- and four-wave mixing has recently been reconsidered by several authors in the context of beam/image amplification applications.
© 1988 Optical Society of America
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