Abstract

We present a simple method to measure the contribution from acoustic phonons to the linear electro-optic effect. A step voltage with a short rise time (600  ps) is applied to the sample, and the electro-optic response is measured in the time domain. For the organic salt 4-N, N-dimethylamino-4-N-methyl-stilbazolium tosylate (DAST), we obtained a negative contribution of r111a=-1.0±0.1 pm/V to the overall electro-optic coefficient of r111=48±5 pm/V λ=1535 nm. The electro-optic response was limited only by the rise time of the applied voltage, which corresponds to a frequency of 1  GHz.

© 1997 Optical Society of America

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