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题名	基于PMNT透明陶瓷的高速电光开关和电控衍射光栅研究
作者	乔磊
学位类别	硕士
答辩日期	2011
授予单位	中国科学院上海光学精密机械研究所
导师	瞿荣辉 ; 叶青
关键词	PMNT电光陶瓷，高速电光开关，电控衍射光栅
其他题名	Study on High Speed Electro-optic Switch and Electrically Tunable Diffraction Grating Based on PMNT Transparent Ceramic
中文摘要	高速光电子学及相关技术在通信、传感、信号处理、材料加工、空间应用等领域已经获得了广泛的应用，具有广阔发展空间。在未来全光通信网中，光交换技术的发展，在某种程度上将决定通信技术发展的水平，成为未来光通信网络发展的标识。在光信息交换节点中，要实现包括分插复用、波长转换、信号放大均衡等多种功能，其中不可或缺的是高速、宽带、低插损、偏振无关、低串话的光开关器件。而在高速光强度调制、光路的切换和扫描等激光应用领域，电控可调谐衍射光栅技术是一个非常有效的解决方案和技术途径之一。因此，发展高速光电子器件技术必将在未来光网络发展中起到越来越重要的支撑作用，成为光网络的重要单元支柱技术之一。相关系统技术飞速发展和应用领域的多样化对高速光电子器件技术带来了巨大的需求和新的发展机遇同时，也对光电子器件与技术提出了巨大的挑战，高速光电子器件技术仍然存在许多重大关键技术问题亟待解决。本文紧跟国际新型高电光材料（PMNT透明电光陶瓷）发展的前沿动态，探索解决现有相关高速光电子器件的 “瓶颈”问题和技术“矛盾”，开展了基于这种新型高电光陶瓷材料的偏振无关的高速电光开关和电控衍射光栅技术的研究，取得了一系列不错的结果，本文涉及到的具体研究内容如下： 对新型PMNT电光陶瓷的光学特性（包括有效折射率、电光系数、热光系数、回线特性和电致饱和现象等）进行了全面系统的测试研究和分析，为接下来器件的结构设计和特性表征提供理论依据和参考； 在课题组前期研究成果基础之上，将PMNT电光陶瓷应用于具有初始π相移结构Sagnac环上，实现了一种新型偏振无关特性的高速电光开关。论文在对开关的偏振无关理论进行了详细分析的基础上，搭建了相关的实验测量装置，实现了高速电光开关的开关速度为165ns，常温下的开关电压215V，证明了该电光开关具有重复性好、偏振无关等优点。同时论文还对开关的温度响应特性、频率响应特性进行了系统的实验研究和分析；在此基础上，提出了改进高速电光开关温度稳定性的技术方案； 提出了一种基于PMNT电光陶瓷的反射式表面叉指电极衍射光栅结构，建立了其对应的理论分析物理模型，利用MATLAB对该物理模型进行了编程仿真，制作出了电控衍射光栅实物器件，并通过数值模拟和实验两种方式，详细研究了电压、偏振态、入射角度对光栅远场衍射图样的影响，并对影响该仿真程序仿真精度的因素进行了分析。最后通过实验结果和数值模拟结果之间的对比验证了该理论模型的正确性。
英文摘要	High speed photoelectronics and technology are widely used in optical communication systems, sensors, signal processing, material cutting and space applications. In the future all-optical communication system, the optical switching technology plays a key role and represents the level of future optical communication network. The optical switch with high speed, large bandwidth, low insertion loss, polarization-independent characteristic and low crosstalk are indispensable if the optical add-drop multiplexer, wavelength conversion, amplification equilibrium need be realized in a single switching node. For the high speed optical intensity modulator, optical path switching and scanning realm, the electrically tunable diffraction grating is one of the effective and promising methods. Therefore, high speed photoelectronics and technology will play a more and more important role in the development of the future optical network and become one critical unit technique. The rapid growth of the system technology and the application diversification not only bring the huge requirement, but also it brings big challenges for high speed photoelectronics and technology. Some key problems are still exist and should be solved urgently. This dissertation keeps pace with the developments of the new kinds of high electro-optic materials (PMNT ceramic), explores and solves the ‘bottleneck’ problems and the ‘confliction’ techniques in the current high speed photoelectronics and technology. We engage in polarization independent high speed electro-optic switch and electrically tunable diffraction grating based on this new kind of electro-optic ceramic. Some good research results are obtained. The dissertation is organized as below: Optical properties of the PMNT electro-optic ceramic (including effective refractive index, electro-optic coefficient, thermo-optic coefficient, hysteresis and the saturation phenomenon of the Kerr effect) are tested and analyzed in detail, which may provide some fundamental references for the impending structure design and characteristic measurement of novel photoelectron devices. Based on the previous works of our group, a polarization independent electro-optic switch which uses π-shifted fiber Sagnac loop structure is designed and experimentally studied. Based on carefully theoretical analysis, an experiment measurement setup is built. The switching time and the switching voltage of 165ns and 215V at room temperature is realized. The experimental results show that the proposed switch possesses polarization independent and good repeatability. The influence of the temperature and switching frequency on the switching Voltage is also studied. Based on the above works, a method to improve the temperature stability of the switch is introduced. A novel reflection-type electrically tunable grating based on PMNT ceramic is also designed and fabricated. The theoretical model of this grating is built; the simulation results are also analyzed and discussed. The effects of applied voltage, polarization state and incident angle on the diffraction pattern are carefully studied. The simulation results are in good agreement with the experimental results.
语种	中文
内容类型	学位论文
源URL	[http://ir.siom.ac.cn/handle/181231/16698]
专题	上海光学精密机械研究所_学位论文
推荐引用方式 GB/T 7714	乔磊. 基于PMNT透明陶瓷的高速电光开关和电控衍射光栅研究[D]. 中国科学院上海光学精密机械研究所. 2011.

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