几种新型吡啶腙类Schiff碱配体的合成

分别以6-溴吡啶-2-甲酸和3-腈基-4-甲基-2,6-二氯吡啶为原料,经过酰胺化、肼取代、缩合等反应合成4种新型吡啶腙类Schiff碱有机配体:N-苯基-2-甲酰胺-6-肼吡啶缩水杨醛;N-苯基-2-甲酰胺-6-肼吡啶缩香草醛;N-苯基-2-甲酰胺-6-肼吡啶缩对羟基苯甲醛;3-腈基-4-甲基-2,6-二肼吡啶二缩水杨醛。通过红外光谱、核磁共振谱对其结构进行了表征。     

光敏性杂化SiO2波导薄膜的制备、表征及应用

利用有机/无机杂化方法制备了光敏性溶胶-凝胶（sol-gel）SiO2材料，在预生长了18μm厚的SiO2上包层的硅基片上旋涂成膜。经前烘、紫外曝光、后烘的薄膜在5μm×5μm的扫描范围内的表面粗糙度只有0．266nm，表面起伏度只有0．336nm。利用紫外光直写技术，制作出条形波导器件。SEM照片表明波导端面形状较好，侧壁陡直。对1×4多模干涉型分束器进行初步的通光测试，观察到分光效果较好的近场输出图像。     

紫外光直写杂化溶胶-凝胶SiO2光波导器件

利用有机/无机杂化方法制备了光敏性溶胶-凝胶(sol-gel)SiO2材料,在硅基片上旋涂成膜.研究了薄膜折射率和厚度随紫外曝光时间、后烘温度及时间等外界工艺条件的变化关系.利用紫外光直写技术,制作出1×2,1×4多模干涉(MMI)型分束器,并且观测到了分光效果较好的近场输出图像.     

A 45-channel 100 GHz AWG based on Si nanowire waveguides

A 45-channel 100 GHz arrayed waveguide grating (AWG) based on Si nanowire waveguides is designed, simulated and fabricated. Transfer function method is used in the spectrum simulation. The simulated results show that the central wavelength and channel spacing are 1 562.1 nm and 0.8 nm, respectively, which are in accord with the designed values, and the crosstalk is about ?23 dB. The device is fabricated on silicon-on-insulator (SOI) substrate by deep ultraviolet lithography (DUV) and inductively coupled plasma (ICP) etching technologies. The 45-channel 100 GHz AWG exhibits insertion loss of 6.5 dB and crosstalk of ?8 dB. This work has been supported by the National High Technology Research and Development Program of China (No.2015AA016902), and the National Natural Science Foundation of China (Nos.61435013 and 61405188). E-mail:zhangjiashun@semi.ac.cn      

基于GRNN-MC的变压器振动信号预测

变压器振动信号是评估其工作状态的重要参数之一,与绕组松动或变形等隐患密切相关,为揭示变压器振动信号的变化趋势,本文提出了一种基于广义回归神经网络和马尔科夫链修正的变压器振动信号预测方法。即分别以变压器运行电压、负载电流和振动信号归一化特征频率为输入和输出建立变压器振动信号广义回归神经网络预测模型,然后引入马尔科夫链并结合负载电流的变化对振动信号计算结果进行修正以获得最终的预测结果。对某500 kV变压器振动在线监测信号的分析结果表明：经马尔科夫链修正后的变压器广义回归神经网络振动信号预测模型预测精度高,可为变压器绕组运行状态的振动监测技术提供重要参考。     

基于二氧化硅平面光波导的强度均衡的光脉冲对的产生

提出了一种基于平面光波导工艺的带有可调定向耦合器的非对称MZI结构.模拟结果显示,当定向耦合器的两个耦合臂的折射率独立改变时,定向耦合器的调制效果较好;当调制电极与耦合区的波导间距为0时,两个耦合臂的温度差达到最大.测试得到,AMZI的插入损耗为2.05 dB,延迟时间为151.4 ps,脉冲对的功率比近似为1.该器件有助于提高集成QKD器件的性能.     

紫外光直写杂化溶胶-凝胶SiO2光波导器件

利用有机/无机杂化方法制备了光敏性溶胶-凝胶(sol-gel)SiO2材料,在硅基片上旋涂成膜.研究了薄膜折射率和厚度随紫外曝光时间、后烘温度及时间等外界工艺条件的变化关系.利用紫外光直写技术,制作出1×2,1×4多模干涉(MMI)型分束器,并且观测到了分光效果较好的近场输出图像.     

基于SOI纳米线AWG超紧凑三向滤波器

本文针对FTTH,设计并制备了基于SOI纳米线AWG的三向滤波器。利用传输函数法模拟了器件的传输谱,模拟结果表明器件能很好的实现三向滤波的功能。通过深紫外光刻和感应耦合等离子刻蚀设备,制备了所设计的器件。输出光谱分析表明,器件的通道间串扰为-15 dB,3 dB带宽为11.04 nm,三个通道的输出波长分别为1455 nm、1510 nm和1300 nm,偏离了设计值,波长的偏移主要是由制造过程中阵列波导宽度的偏移设计宽度45 nm引起的,材料色散也是导致波长偏移设计值的一方面原因。     

Ultra compact triplexing filters based on SOI nanowire AWGs

An ultra compact triplexing filter was designed based on a silicon on insulator(SOI) nanowire arrayed waveguide grating(AWG) for fiber-to-the-home FTTH.The simulation results revealed that the design performed well in the sense of having a good triplexing function.The designed SOI nanowire AWGs were fabricated using ultraviolet lithography and induced coupler plasma etching.The experimental results showed that the crosstalk was less than -15 dB,and the 3 dB-bandwidth was 11.04 nm.The peak wavelength output from ports a,c,and b were 1455,1510 and 1300 nm,respectively,which deviated from our original expectations.The deviation of the wavelength is mainly caused by 45 nm width deviation of the arrayed waveguides during the course of the fabrication process and partly caused by material dispersion.