项目名称： 石英极化光纤制备与特性研究

项目编号： No.61475095

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 陈振宜

作者单位： 上海大学

项目金额： 82万元

中文摘要： 全光纤结构的相位调制、高速光开关、光波长转/变换等器件已成为当前光纤技术领域应用基础性研究的前沿热点。这类器件的实现，要求光纤材料具有二阶非线性效应。然而，常规光纤材料为二氧化硅熔融石英，因其材料的宏观中心反演对称性而不存在二阶光学非线性效应。但已有实验研究表明，该材料经高温强电场极化处理后，可具有永久的二阶光学非线性效应。基于此，本项目利用统计物理学与原子物理学原理，从微观结构上，研究二氧化硅熔融石英及其掺杂材料二阶光学非线性的形成条件和机理，建立相应的理论分析模型。在已有的小型特种光纤拉丝机上，研制出适合拉丝工艺的高温强电场极化装置，实现拉丝与极化一体化的石英极化光纤的拉制。测量分析石英极化光纤二阶光学非线性系数，验证理论分析结果。探索研究极化光纤在电流电压和应力应变分布式传感特性。本项目的研究成果将对全光通信中的关键器件和分布式光纤传感技术的发展具有重要的科学意义和应用价值。

中文关键词： 极化光纤；石英光纤；光纤传感；改进化学气相沉积；二阶非线性

英文摘要： Nowadays, The devices based on all-fiber, such as phase modulation, high-speed optical switch, optical wavelength transfers, have already become the frontier and hot point of applied basic research in the field of optical fiber technology. It is required that the fiber material possesses second-order nonlinear effects to realize these devices. However, conventional optical fiber material is fused silica with macroscopically inversion center of symmetry and without second-order nonlinear effects. But some experimental researches indicated that it will gain second-order nonlinear effects permanently after thermally poling. So, this project will use the principle of statistical physics and atomic physics to research the formation conditions and mechanism of the second-order nonlinear effects of fused silica and its doped materials in microscopic structure, establishing the corresponding theory analysis model, and manufacture high temperature and strong electric field poling apparatus suitable for drawing technique, in small special fiber drawing machine we have, realizing the integration of optical fiber's wiredrawing and poling of silica poling fiber. We will measure and analysis the second-order nonlinear coefficient of silica poling fiber to verify the theoretical analysis, and explore the distributed sensing characteristics of poling fiber in current, voltage, stress and strain. The research results in this project will have important scientific significance and application values to the development of key components for all optical communication and the distributed optical fiber sensing technology.

英文关键词： poled fiber;silica fiber;fiber sensor;MCVD;secondary nonlinear