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文章利用光折变晶体中非简并双光束耦合的有关理论，提出一种能同时确定光折变晶体中光束耦合强度和响应时间常数的方法，并以有关ＳＢＮ晶体的实验结果为例，说明了该方法的应用．
Based on the theory of non-degenerate two-beam coupling in photorefractive crystal, a method for simultaneous determination of beam coupling strength and response time constant in photorefractive crystal is proposed. The experimental results of SBN crystal are taken as examples The application of this method.