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We report an experiment in which interaction between an optical wave at frequency f0 and a microwave signal at fm was used to generate a coherent optical beam at f0 + fm. The interaction was provided by lossless electro-optic modulation of the dielectric constant within a laser resonator and can thus be viewed as a demonstration of parametric(3-5) interaction at optical frequencies.
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Peterson et al. (1964) studied this question.
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