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简单反射法是电光聚合物薄膜研究中测量线性电光系数(Pockels系数)的一种简单而常采用的方法,但文献中关于在调制电场作用下s光和p光光程差和位相差改变的计算有不尽完善之处,线性电光系数的表达结果也不尽相同.在充分考虑各种因素的情况下,对该方法给出了合理的理论处理,得出了简单反射法更为严格的线性电光系数表达式.并测量对比了几种聚合物线性电光系数的结果.讨论了简单反射法测量聚合物薄膜线性电光系数的局限性.
The simple reflection method is a simple and often used method to measure the linear electro-optic coefficient (Pockels coefficient) in the research of electro-optic polymer film. However, the literature about the change of optical path difference and phase difference between s light and p light under modulated electric field The calculation results are not perfect, and the results of linear electro-optic coefficient are also different.With all kinds of factors fully considered, this method is given a reasonable theoretical treatment, and the simple reflection method is more rigorous Linear electro-optic coefficient expression, and the results of the linear electro-optic coefficients of several polymers were measured and compared.The limitations of the simple reflection method for measuring the linear electro-optic coefficient of the polymer film were discussed.