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通过双波耦合实验证明在一种新的有机聚合物光折变材料中双波耦合增益系数超过吸收系数。１０５μｍ厚的样品衍射效率可达到８６％，光栅形成的响应时间达到１００ｍｓ量级，双波耦合增益系数超过了２００ｃｍ－１［１］。并引入了一种新的方法分析了其光折变机理
Two-wave coupling experiment shows that the absorption coefficient of double-wave coupling exceeds the absorption coefficient in a new organic polymer photorefractive material. The diffraction efficiency of the sample with the thickness of 105μm can reach 86%, the response time of the grating formation reaches 100ms, and the gain coefficient of the two-wave coupling exceeds 200cm-1 [1]. A new method is introduced to analyze the photorefractive mechanism