【作者】 刘娟；

【导师】 任晓敏；

【作者基本信息】 北京邮电大学 ， 电磁场与微波技术， 2006， 硕士

【摘要】 本论文工作是围绕任晓敏教授承担的973项目课题“基于微结构光纤的光电子功能器件的创新与基础研究”(项目编号：2003CB314906)、863项目“单结构与多结构集成式光子晶体光纤及器件”(课题编号：2003AA311010)、教育部重大项目“基于微结构光纤的新一代光通信器件及系统”(项目编号：104046)和北京教委共建项目(项目号：XK100130437)展开的。 光子晶体光纤(photonic crystal fibers，简称PCF)也称为微结构光纤，它是从光子晶体的基础上发展而来的。与标准光纤相比，由于光子晶体光纤的几何参数可以自由调整，使得它具有很多优异的特性，如无截止单模特性，色散和模场面积高度可控，高双折射等等。所以光子晶体光纤激起了人们浓厚的研究兴趣，发展非常迅速。本论文利用时域有限差分法对折射率导光型光子晶体光纤的基本特性进行了系统的研究，着重研究了光子晶体光纤的有效面积和非线性特性；同时完成了基于光子晶体光纤的主动锁模光纤环的实验研究；并对基于PCF的10Gb／s超宽WDM通信系统进行了系统仿真。以下是论文的主要研究工作。 1．对时域有限差分法进行了深入研究，利用时域有限差分法对光子晶体光纤的基本特性进行了数值模拟，得到了一些有意义的结果。 1)研究了PCF的模场分布，数值模拟的结果和实验观测到的真实光强分布是一致的。 2)对PCF的模式特性进行了系统的研究，着重分析了PCF的有效模折射率与其结构参量的依赖关系。 3)对光子晶体光纤的有效面积进行了系统的研究，分析了有效面积随结构参数的变化规律，计算了相对孔径d／∧不同时，空气孔间距∧的值从0.8μm变化到2.0μm范围内PCF的有效面积的大小，为PCF的设计提供了重要参考。 4)对光子晶体光纤的非线性系数与不同结构参量之间的关系进行了系统的研究，特别是对不同结构参数下的PCF在中心波长为1.55μm的非线性系数进行了详细的数值分析，得到了非线性系数随结构参数的变化规律。该分析结果可为设计高非线性光子晶体光纤提供一更多还原

【Abstract】 The research included in this thesis is supported by National Basic Research Program of China (No.2003CB314900), the Key grant Project of Chinese Ministry of Education (No. 104046), National 863 High Technology Project of China (2003AA311010), and Science and Technology Project of Beijing Education Committee (No. XK100130437).Photonic crystal fiber (PCF, also called micro-structured fiber) is a new conception. Compare with standard fiber, PCF is a silica fiber with an array of air holes running down its length, it has many unusual properties, such as endless single mode operation, flexible tailorability of dispersion and modal area, high birefringence etc., which suggest a lot of potential applications in the field of optical communications and sensing. PCF has attracted a lot of scientific and technological interest, and is being developed at an incredible pace. In this thesis, Nonlinearity and effective area of photonic crystal fiber using finite difference Time domain mode solver have been researched. A wavelength tunable, high repetition rate mode-locked fiber ring laser, which is including PCF, also is demonstrated.1. Some basic characteristics of PCF have been studied by using FDTD; a lot of important results have been obtained.(1) The field distribution of PCF is investigated, the filed distribution is calculated and is shown to agree very well with experimental values.(2) The mode characteristics of the photonic crystal fibers (PCF) are investigated in detail by using the FDTD.(3) Research on effective area of photonic crystal fiber by changing the structure parameters of PCFs. Effective area depende with the air hole size and the pitch in更多还原