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The recently discovered generation of conjugate waves in the course of observing several nonlinear optical phenomena has attracted a lot of attention in the international technical community. Much of the interest arises from a fascination with the idea of “time reversal” and with impressive, almost magical demonstrations in which severely distorted optical beams can be restored to their original, unaberrated state.
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C. R. Giuliano (1981) studied this question.
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