光纤中基于受激散射的光调控光速研究

项目名称： 光纤中基于受激散射的光调控光速研究

项目编号： No.60878010

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 李乙钢

作者单位： 南开大学

项目金额： 30万元

中文摘要： 开展光纤中基于受激散射的光调控光速的研究具有重要的理论意义和应用价值。项目组围绕研究目标，立足创新，顺利完成了各项研究工作，获得了多项研究成果。主要包括：1、光纤中基于受激布里渊散射（SBS）的光速调控及其畸变管理的理论分析研究；研究发现，在畸变限制下，相较于其他增益结构，双增益单补偿结构能够获得最佳的延迟脉冲。2、脉冲信号光源的制备与各类脉冲光信号的产生和性能优化的理论和实验研究；制备了布里渊单模光纤环形腔脉冲激光器；通过优化正色散光纤的长度和输入脉冲的功率，可实现对光脉冲的整形。3、光纤中基于受激布里渊散射的光速调控的实验研究；实现了对信号脉冲群速延迟的光调控；以及增益饱和区得到脉冲光信号的群速超快。4、掺铒光纤中基于相干布居振荡（CPO）效应的光速调控的理论分析和实验研究；实现了对信号光速的调控以及由慢光向快光的转化。5、光纤中基于耦合共振诱导透明（CRIT）效应实现光速调控的理论分析和实验研究工作等。 另外，项目组在研究生培养、科研论文的撰写和发表，相关专利的申请，以及开展与项目后续工作相关的研究工作等诸方面也取得了可喜的成果。

中文关键词： 受激布里渊散射；畸变管理；光调控光速；脉冲整形；快慢光

英文摘要： The research on the optical controlling of the light group velocity in optical fibers using stimulated scattering are very important not only in theoretical study but also in practical application. The project team around the goal of this study, based on innovation, has successfully completed the study work and received a number of research results. Include: first, the optical controlling of the light group velocity in optical fibers based on Stimulated Brillouin scattering (SBS) are theoretically studied through the method of distortion management. Research indicates that optimal delay can be obtained in the double gain, single compensation structure, with the central gain 3.2, maximum fractional time delay 0.38. Second, the output power, spectral properties and time domain characteristics of a Brillouin single-mode fiber ring laser are researched experimentally. We also experimentally research the generation of triangular-shaped optical pulse using the method of passive nonlinear pulse shaping. Third, we have obtained numerically and experimentally the fast and slow light based on the Stimulated Brillouin scattering within the gain region in optical fibers just adjusting the pump power. The time delay increased linearly with the increasing pump power in the small signal gain region. But in the gain-saturation region, the time delay decreased with the increasing pump power and even became negative. Fourth, the fast and slow light based on the Coherent Population Oscillation (CPO) effect in erbium-doped optical fibers has been studied theoretically and experimentally. The transformation by the slow to advanced light are achieved through changing modulation frequency. Fifth, we also theoretical analysis and experimental research the optical controlling of the light group velocity in optical fibers based coupled-resonator-induced transparency (CRIT) through several different types of slow light structures composed of ring resonators. In addition, we have also obtained some achievements of supervising the graduate student, publishing the papers and applying the patents, as well as carrying out the correlative field studying respectively.

英文关键词： Stimulated Brillouin scattering; optical controlling of the light group velocity; distortion management; pulse shaping; fast and slow light