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Electro-optic effect
Electro-optic effect: Any one of a number of phenomena that occur when an electromagnetic wave in the optical spectrum interacts with an electric field, or with matter under the influence of an electric field.
Note 1: Two of the most important electro-optic effects having application as modulation mechanisms in optical communication are the Kerr effect and the Pockels effect, in which birefringence is induced or modified in a liquid (Kerr effect) or solid (Pockels effect).
Note 2: The term "electro-optic" is often erroneously used as a synonym for "optoelectronic."
Source: from Federal Standard 1037C and from MIL-STD-188
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