顺电相KLTN晶体Kerr系数和透射率的数字全息测量

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提出一种用于顺电相晶体Kerr系数和透射率的数字全息测量方法。该方法是数字记录晶体在不同电压时的全息图,再现数字全息图,得到晶体的复振幅信息,即振幅和相位分布。由晶体的振幅分布获得晶体的透射率;由相位分布得到不同电压差时的折射率变化量,从而计算得到晶体的电光系数。对顺电相Mn0.25%KLTN晶体进行了测量,记录了不同入射光模式以及不同电压时的数字全息图,得到了晶体透射率T和电光系数R11、R12。研究结果表明,该方法可用于顺电相晶体电光系数和透射率的测量,并且对晶体形状,照明光斑大小没有要求。
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