Abstract
Holographic recording in photorefractive materials1 is the subject of continued interest in the areas of image enhancement, real-time spatial light modulation and amplification. One of the properties of photorefractive media where energy can be transferred from a strong "pump" beam into a weaker "signal" beam2 has come to be known as "two-wave mixing". This property holds promise as a means for providing effective energy coupling for systems where efficient use of a fixed light budget is an over-riding design requirement, such as in a spacecraft laser communications link3.
© 1988 Optical Society of America
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