具有温度普适性的平坦宽带波长转换技术研究

项目名称： 具有温度普适性的平坦宽带波长转换技术研究

项目编号： No.61302105

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 刘涛

作者单位： 华北电力大学（保定）

项目金额： 19万元

中文摘要： 未来光网络需要光节点具备能够对光波长直接进行操作的宽带全光波长转换技术和光交换/路由技术。针对此目标，本课题对具有温度普适性的、基于非均匀周期准相位匹配结构的平坦宽带波长转换技术进行研究。通过深入分析级联二阶非线性效应下基于非均匀周期准相位匹配晶体的波长转换机理，建立适用于级联二阶非线性效应的快速矩阵计算模型，结合改进的优化算法对晶体结构进行优化设计，以实现扩展转换带宽和泵浦带宽的功能。通过综合考虑多种因素，提出结构简单灵活、对不同温度普适、高效、平坦的超宽带不可调波长转换方案及兼具宽调谐范围的可调波长转换方案，并以此为基础，寻求基于非均匀周期准相位匹配晶体的宽带波长转换技术与光路由的融合方案。此研究适应了光通信器件的发展要求，能够为具有宽带波长分配能力和动态路由能力且具有温度稳定性的光节点设备的研制提供有力的支撑。

中文关键词： 光通信网络；全光网；波长转换；光路由；准相位匹配

英文摘要： The broadband all-optical wavelength conversion and wavelength switching/routing, which enable optical nodes to operate optical wavelength directly, are two key technologies for the next generation optical networks. Aperiodic quasi-phase matched (QPM) structures is therefore investigated and utilized in this subject to realize flattop broadband wavelength conversion, which is insensitive to the change of temperature. Firstly, matrix model, which is suitable for cascaded second-order nonlinear effects, is established, and optimization algorithm is improved to optimal design the QPM structures, in which enhanced signal bandwidth as well as broadened pump bandwidth can be achieved. Secondly, an unadjustable wavelength conversion scheme is presented to increase both the conversion bandwidth and the pump detuning bandwidth and enhance the flatness of response with high conversion efficiency. A tunable wavelength conversion scheme is also proposed to obtain widened conversion bandwidth and enhanced converted wave tunable range simultaneously. Finally, the proposed tunable wavelength conversion in aperiodic quasi-phase matched crystals is applied to realize wavelength routing. These investigations are helpful for the development of optical node equipment which is insensitive to the change of temperature and needs to ha

英文关键词： optical communications network；all-optical network；wavelength conversion；optical routing；quasi-phase matching