We report a new technique to suppress beam-divergence fluctuations in a DC-biased KTa1-xNbxO3 (KTN) optical beam deflector. In our new configuration, we introduced a temperature gradient in the direction of the electric field applied to the KTN crystal, to produce a permittivity gradient in the direction required to cancel out the effect of the asymmetry of the electron injection. We demonstrated experimentally that this temperature gradient successfully reduced the beam-divergence fluctuation.

中文翻译：

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减小KTN光束偏转器的光束发散波动

我们报告了一种抑制直流偏置 KTa1-xNbxO3 (KTN) 光束偏转器中光束发散波动的新技术。在我们的新配置中，我们在施加到 KTN 晶体的电场方向上引入了温度梯度，以在抵消电子注入不对称效应所需的方向上产生介电常数梯度。我们通过实验证明，这种温度梯度成功地减少了光束发散波动。