A theory of acoustic scattering of light in a Fabry-Perot resonator is described. The theory predicts the optimum acoustic scattering frequencies, the cavity geometry. The calculation is based on the formalism developed by the acoustic bandwidth, and the scattering enhancements as a function of ments are discussed which yield results in excellent agreement with the Gordon and Rigden for the Fabry-Perot Electro-optic Modulator. Experitheory. Acoustic phase velocities can be determined to 4-place accuracy.can be made to produce 100% amplitude modulation with acoustic powers lessThe experiments illustrate that narrowband modulators ( W 10 mc/s) than 50 milliwatts. Session 12: Microwave Tubes /I -Crossed Field DevicesThursday, Oct. 21, 2:OO to 5:OO p.m.

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