光子晶体光纤产生超高速率、超短光脉冲序列的研究

项目名称： 光子晶体光纤产生超高速率、超短光脉冲序列的研究

项目编号： No.60808004

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 张爱玲

作者单位： 天津理工大学

项目金额： 21万元

中文摘要： 本项目拟利用非线性光子晶体光纤中的调制不稳定性效应，以双频拍频光波为初始光源，以非线性光子晶体光纤作为非线性介质，研制一种应用于高速光纤通信的、优质的超高速率、超短脉冲光源。光子晶体光纤是目前处于国际研究前沿的一种特种光纤，它的非线性系数比传统光纤的要高几个量级，通过改变光子晶体光纤的空气孔的大小和位置还可以对光纤的色散进行设计和控制。根据高速光纤通信对超高速率、超短光脉冲的要求，我们将新型的高非线性光子晶体光纤应用于高速光脉冲的产生。在本项目中，我们不仅深入研究光子晶体光纤中的非线性效应，解决双频拍频光源，还研究光纤与光源对产生的超高速率光脉冲的影响等理论和技术问题。该超高速率光脉冲的产生方案具有结构简单、易操作、成本低、灵活性高、调谐范围宽等优点，是一个很有意义的研究课题。由于非线性效应的响应速度非常快，该脉冲产生方案在超高速光纤通信系统中有着非常广泛的应用前景。

中文关键词： 超高速率;超短光脉冲；调制不稳定性；光子晶体光纤；光纤非 线性系数；光纤色散。

英文摘要： This project plans to develope a high quality, ultrahigh speed, ultrashort optical pulse source, which uses a dual frequency beat optical wave as the initial source and a highly nonlinear photonic crystal fiber (PCF) as the nonlinear medium, for the high speed optical fiber commnications based on the modulation instability effect in the PCF. As a special fiber, PCF is a forefront research topic in the world. The nonlinear coefficient of the fiber is typically several orders of magnitude larger than that of a conventional single mode fiber. The dispersion of the fiber is designable and controllable by changing the size and position of the airhole of the fiber. According to the requirement of high speed optical fiber communicaitons on high speed, ultrashort optical pulse source, we apply the new type highly nonlinear PCF into the high speed optical pulse generation. In this project, we not only study the nonliear effect in PCF and the dual frequency beat source, but also study the therotical and technical part of the influencing factors for high speed optical pulse by the fiber and optical source. The scheme proposed in this meaningful project has the advantages of simple structure, easy operation, low cost, flexibility and wide tuning range ect. Due to the fast response of the nonlinear effect, this scheme will have a wide application in ultrahigh speed optical fiber communication system.

英文关键词： Ultrahigh speed; ultrashort optical pulse; Modulation instability; Photonic crystal fiber; Nonlinear coefficient; Chromatic dispersion of fiber