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单词 degenerate four-wave mixing
释义 degenerate four-wave mixing
[di`jen·ǝ·rǝ·rǝt `fȯr ´wāv `mik·siŋ]
OPTICS
A method of achieving optical phase conjugation in which two strong counterpropagating pump beams, having the same frequency, set up a standing wave in a clear material whose index of refraction varies linearly with intensity, thereby providing the conditions in which a third beam, at the same frequency, incident upon the material from any direction, results in a fourth beam which precisely retraces the third one.
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