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.     

Polymeric 32-channel arrayed waveguide grating multiplexer using fluorinated poly (ether ether ketone)

In wavelength division multiplexing (WDM) systems, an arrayed waveguide grating (AWG) multiplexer is a key component. A polymeric AWG multiplexer has recently attracted much attention due to its low cost processing and a potential of integration with other devices. Fluorinated poly (ether ether ketone)(FPEEK) is excellent material for fabrication of optical waveguides due to its low absorption loss at 1.55-μm wavelength and high thermal stability. A 32-channel AWG multiplexer has been designed based on the grating diffraction theory and fabricated using newly synthesized FPEEK. During the fabrication process of the Polymer/Si AWG device, spin coating, vaporizing, photolithographic patterning and reactive ion etching (RIE) are used. The AWG multiplexer measurement system is based on a tunable semiconductor laser, infrared camera and a Peltier-type heater. The device exhibits a wavelength channel spacing of 0.8nm and a center wavelength of 1548 nm in the room temperature.     

新型极化聚合物薄膜电光调制器研究

用对硝基偶氮苯类为侧链的键合型聚合物，采用高温电晕极化的方法制作电光薄膜，设计并构造极化聚合物薄膜电光调制器。当通光方向和极化方向平行并且垂直于极化聚合物薄膜的表面时，利用法布里-帕罗（F-P）腔中多光束干涉，可以把通过的光由位相调制转化为强度调制，有利于电光调制器的小型化和高速封装。用这种聚合物薄膜电光调制器测量了锢锡氧化物共面波导上的电信号，并对系统的工作原理进行了分析。实验结果表明，薄膜调制器具有线性电光效应；当F-P腔的精细因子为20（为1.3μm的光），调制电场为1V/μm时，研制的极化聚合物电光调制器的调制深度可达到0.01%。     

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     

Polymeric 32-channel arrayed waveguide grating multiplexer using fluorinated poly (ether ether ketone)

In wavelength division multiplexing (WDM) systems, an arrayed waveguide grating (AWG) multiplexer is a key component. A polymeric AWG multiplexer has recently attracted much attention due to its low cost processing and a potential of integration with other devices. Fluorinated poly (ether ether ketone) (FPEEK) is excellent material for fabrication of optical waveguides due to its low absorption loss at 1.55-μm wavelength and high thermal stability. A 32-channel AWG multiplexer has been designed based on the grating diffraction theory and fabricated using newly synthesized FPEEK. During the fabrication process of the Polymer/Si AWG device, spin coating, vaporizing, photolithographic patterning and reactive ion etching (RIE) are used. The AWG multiplexer measurement system is based on a tunable semiconductor laser, infrared camera and a Peltier-type heater. The device exhibits a wavelength channel spacing of 0.8 nm and a center wavelength of 1548 nm in the room temperature.     

聚合物阵列波导光栅复用器关键技术的研究

介绍了阵列波导光栅(AWG)复用器的工作原理;运用光栅衍射理论和马卡提里近似法,对中心波长为1.55 μm,波长间隔为1.6 nm的聚合物AWG进行参量设计,通过数值模拟验证了设计的正确性.用甲基丙烯酸甲酯类聚合物对AWG的制备工艺进行了研究,用铝作掩模制作了聚合物光波导,测试结果表明在1.55 μm处波导实现单模传输.     

亚微米外部电光检测技术

将固浸透镜技术与电光检测技术相结合，建立了具有亚微米空间分辨率的外部电光检测系统，通过使用GaAs半球作外部电光探头，用数值孔径为0.3的显微物镜对波长为1.3μm的探测光束进行聚焦，得到了半峰全宽直径为0.7μm的聚焦光斑，成功测量了微带线上10kHz的正弦波信号，验证了系统的线性响应特性，并得到了6mV/√Hz的电压灵敏度。     

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.     

可交联的PMMA型和PS型高热稳定性二阶非线性光学材料的合成与表征

采用封管反应的方法,以较高产率(80%以上)合成了一系列含环氧基团的可交联PMMA型和PS型极化聚合物材料,该材料具有很好的成膜性.用DSC和T_gA等方法研究了聚合物固化前后的热性能,结果表明,由于聚合物在极化后期经热固化使引入的环氧基团开环交联,聚合物的玻璃化转变温度(T_g)较固化前明显提高30～50K.同时,固化后的聚合物具有较高的热分解温度(T_d>543K).对聚合物的二阶非线性光学性质的测试结果表明,在室温下放置100h后,聚合物的电光系数r₃₃值均保持在初始值的75%以上.这是由于环氧基团的开环使固化后的聚合物本身产生一定程度的交联,导致取向后的发色团被聚合物的交联网禁锢而不易弛豫,从而使这类PMMA型和PS型二阶非线性聚合物材料的热稳定性能得以提高.