一种光交联电光聚合物的合成及其外部电光测量

合成了一种新的带有光交联基团的电光聚合物,其高分子基体是双酚A环氧树脂,二阶非线性生色团对硝基苯胺和光交联基团肉桂酰氯都键接在高分子链上.将聚合物溶解后旋涂成膜,对薄膜进行电晕极化.极化的后阶段用紫外光照射,使聚合物体系交联成网络结构,形成生色团取向长时间稳定的聚合物电光薄膜.用这种聚合物电光薄膜构成外部电光调制系统,测量了共面波导上的电信号.     

High Cost Performance Organic-Inorganic Hybrid Material for Electro-optic Devices

We report a low-cost electro-optic （EO） sol-gel material with large EO coefficient and excellent poling stability for EO devices. Disperse red i （DRI） chromophore is doped in the three-dimensional silicon dioxide/titanium dioxide network possessing a high γ33 （88pm/V at 1300 nm wavelength and 71 pm/V at 1550 nm wavelength）. Favourable poled stability （less than 5% relaxed after 2500 hours at 80℃） and low absorption are demonstrated. Strip-loaded waveguide Mach-Zehnder （M-Z） modulators are implemented based on this synthesized EO material, showing 7 V half-wave voltage and less than 9 dB insertion loss at 1550 nm wavelength.     

基于F-P腔的极化聚合物的纵向电光调制

利用Fabry-Perot腔实现了置于腔内的极化聚合物电光薄膜的纵向电光调制,此模型中极化电场方向、调制电场方向均与通光方向平行.腔的精细因子大约为18(对1.3μm的光),膜厚度为1μm.实验所得调制深度在调制电场为1V/μm时为0.012%.其结果证实了利用Fabry-Perot腔实现纵向电光调制并利用其研究极化聚合物薄膜的可能. 关键词： 电光效应 激光束调制 光学聚合物 光学设备     

用不对称法布里-珀罗薄膜测量极化聚合物的电光效应

报道用不对称的法布里－珀罗（AFP）多光束干涉膜测量极化聚合物的线性电光效应。将聚合物在有高反射膜的载体上旋涂成膜后进行电晕极化,利用聚合物自身的反射率和高反射膜构成不对称的法布里－珀罗膜,用这种聚合物电光薄膜的自由放置方法和反射式光路构造电光检测系统,测量了铟锡氧化物共同波导上的电信号,并对系统的工作原理进行了理论分析。结果表明,不对称的法布里－珀罗薄膜具有线性电光效应,在1kHz正弦波时系统得到了5mV/√Hz的电压灵敏度。     

Poled Silica/DR1 Films with Thermally Stability and Large Electro-Optic Coefficient Applying in External Probe Tip

Sol-gel-processed silica films doped with Disperse Red 1（DR1） were prepared at 80℃ aging temperature and 120℃ baking temperature with corona poling to obtain stable and large electro-optic （EO） coefficient and film strength. A large EO coefficient of γ33 = 56 pm/V was measured for the film of 05μm thickness at the wavelength of 1300nm, and the value was unvaried at room temperature. Moreover, an external EO probe tip using the film was fabricated for the first time, and a signal voltage level corresponding to the EO signal was calibrated successfully.