摘要
对一种交联型非线性光学聚合物的电光特性及其稳定性进行了研究。通过交联反应将生色团分散红DR19连接到高聚物纤维素二醋酸酯(CDA)可合成得到该交联电光聚合物,交联反应温度为164℃。采用带栅极偏置的电晕极化系统对旋涂制备的聚合物薄膜样品进行极化处理,极化电压为8kV。极化处理后的样品具有较好的电光特性,采用Mach-Zehnder干涉仪测量系统测得样品在1550nm处电光系数为4.80pm/V。通过电光系数和介电驰豫测量研究了交联体系的稳定性,与掺杂型电光聚合物相比,该交联电光聚合物具有很好的长期稳定性,平均驰豫时间达到5.3years,二阶非线性驰豫遵循KWW规律。介电分析结果显示驰豫时间的温度特性满足Arrhenius规律。
The electro-optic properties and the stability of a cross-linked second order nonlinear optical polymer were reported. This polymer was synthesized via the crosslinking reaction by doping Disperse Red19 moieties into the cellulose diacetate system. The crosslinking temperature is 164℃. The spin-coated thin film samples were poled by a corona poling system with a bias-controlled grid at 8 kV. After poling,the electro-optic coeffident was measured to be 4.80 pm/V at 1550 nm by a Mach-Zehnder interferometer. The stability characteristic was researched by a combination of electro-optic coefficient and dielectric relaxation measurement. The cross-linked electro-optic polymer possesses a good long-time stability. The average relaxation time is 5.3 years and the relaxation was modeled by KWW equation. The dielectric analyses show that the temperature dependence of the relaxation time satisfies the Arrhenius law.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2007年第3期338-341,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(60377013
60507013)
武汉理工大学自然科学基金资助项目(ID:XJJ2005175)
关键词
电光聚合物
交联
电光系数
介电驰豫
稳定性
electro-optic polymer
crosslinking
electro-optic coefficient
dielectric relaxation
stability
