基于多泵浦/级联四波混频效应的高光谱效率全光码型转换与全光组播

项目名称： 基于多泵浦/级联四波混频效应的高光谱效率全光码型转换与全光组播

项目编号： No.61201193

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 惠战强

作者单位： 西安邮电大学

项目金额： 25万元

中文摘要： 全光NRZ(Nonreturn to zero)到RZ(Return to zero)码型转换能完成从波分复用到时分复用的网络接口功能，是未来透明光子网络中一项重要的光信号处理技术。本项目拟开展基于新型色散平坦高非线性光子晶体光纤的超宽带可调谐高光谱效率全光NRZ-to-RZ码型转换与全光组播研究，解决目前码型转换器需要光电转换、结构复杂、效率低下等问题。建立面向全光码型转换应用背景的光子晶体光纤中多泵浦/级联四波混频数学模型，揭示光子晶体光纤中多泵浦/级联四波混频效应的物理机理，探索其在码型转换与全光组播方面的潜在应用。采用分布傅里叶法和龙格-库塔法相结合的思想数值求解耦合波方程，寻找多信道多泵浦时信道间串扰抑制方案，探寻码型转换器光谱效率提升方案，设计基于多四波混频原理的全光NRZ-to-RZ码型转换器，满足既能对多信道同时实现码型转换，又具有波长转换和全光组播功能的光子网络需求。

中文关键词： 码型转换；波长组播；光子晶体光纤；四波混频；

英文摘要： All-optical format conversion from NRZ (Nonreturn to zero) to RZ (Return to zero) is a key technology of interfacing WDM (Wavelength division multiplexing)and OTDM (Optical time division multiplexing) system in future transparent photonic network. To accommodate with the WDM/OTDM hybrid networks, we focus on ultra-wide band、 wavelength tunable、 highly spectral efficiency all-optical NRZ-to-RZ format conversion/wavelength multicasting based on dispersion flattened highly nonlinear photonic crystal fiber. Various disadvantages such as optical/electrical conversion, complex scheme, temperature sensitive, low efficiency in traditional format converter are avoided. We propose building a mathematic model of multiple-four-wave-mixing in photonic crystal fiber for all-optical format conversion application, disclosing physical mechanism of multiple-pump/cascaded four-wave-mixing in photonic crystal fiber, exploring its potential applications in format conversion/wavelength multicast. We intend to solve the coupled-wave equations by using split-step Fourier and Runge-Kutta methods, seek a solution of suppressing crosstalk under multiple pump and multiple channels, and find a way of increasing optical spectrum efficiency of format conversion. We design an all-optical format converter which can achieve either simultaneous m

英文关键词： format conversion；wavelength multicast；photonic crystal fiber；four wave mixing；