光纤喇曼放大器偏振相关增益研究

发布时间：2018-03-14 05:11

本文选题：光纤喇曼放大器　切入点：受激喇曼散射　出处：《合肥工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：基于受激喇曼散射(Stimulated Raman Scattering,简称SRS)效应的光纤喇曼放大器(Fiber Raman Amplifier,简称FRA)由于具有响应时间快、饱和输出功率大、易于耦合、低噪声以及大带宽等优点,成为光纤通信系统中非常重要的器件之一,而且近年来光纤制造技术的进展以及高功率半导体激光器等泵浦光源的出现都给FRA的迅速发展创造了有利条件和广阔空间。然而,由于受到外界压力、温度等的影响,传输光纤表现出了残余不对称性,使得光波偏振态发生随机变化,从而造成了增益的偏振相关性,即偏振相关增益(Polarization Dependent Gain,简称PDG)。由于PDG会降低波分复用光纤通信系统的传输性能,因此研究FRA系统中PDG的特性对如何提高光纤通信系统的传输性能提供重要的参考价值。本文工作主要包括以下几个方面： (1)总结了FRA系统中PDG的国内外研究现状及研究背景和研究意义；(2)介绍了FRA的理论基础、光纤中传输光的偏振态理论、FRA的结构类型以及FRA非线性耦合方程的数值模型,并详细推导了与FRA系统中PDG有关的偏振因子Keff;(3)采用求解初值问题的四阶龙格-库塔方法系统研究了前向单泵浦多信号FRA系统中PDG的特性及采用求解边值问题的打靶法研究了后向单泵浦多信号FRA系统中PDG的特性。研究结果表明：单泵浦多信号FRA系统中的PDG主要由泵浦-信号喇曼相互作用产生,并且光纤的PMD值对PDG的影响较明显；(4)采用数值计算的方法研究了多泵浦FRA系统中PDG的特性,研究内容包括：前向泵浦方式、后向泵浦方式以及双向泵浦方式FRA系统中分别由泵浦-信号、泵浦-泵浦、信号-信号以及所有光波之间喇曼相互作用所产生的PDG;采用数值计算的方法比较了三种泵浦方式中泵浦功率、泵浦波长以及泵浦数目等对PDG的影响。
[Abstract]:Based on the stimulated Raman scattering (Stimulated Raman Scattering, referred to as SRS) the effect of fiber Raman amplifier (Fiber Raman Amplifier, referred to as FRA) because of its fast response time, high saturation output power, easy coupling, low noise and high bandwidth advantages, has become one of the most important components in the optical fiber communication system, and in recent years the pump in light of fiber manufacturing technology and high power semiconductor lasers, to the rapid development of FRA and create favorable conditions and broad space. However, due to the external pressure, the effect of temperature of the transmission fiber showed residual asymmetry, the polarization change, resulting in the polarization dependence of the gain. The polarization dependent gain (Polarization Dependent Gain, referred to as PDG). The PDG will reduce the transmission performance of WDM optical fiber communication system, so the research The characteristics of FRA system PDG provides an important reference value on how to improve the transmission performance of optical fiber communication system. This paper mainly includes the following aspects: (1) summarizes the FRA system of PDG in the domestic and foreign research present situation and research background and research significance; (2) introduces the basic theory of FRA, theory of light polarization in the transmission fiber, the structure of FRA type and FRA nonlinear coupled equations of the numerical model, and derived in detail with the FRA system in PDG is related to the polarization factor Keff; (3) four order Runge Kutta method for solving initial value problems of system using forward characteristics of single pump multi signal in FRA system and PDG by solving the boundary value problem of the shooting method to the characteristics of single pump multi signal FRA system in PDG. The results show that: the single pump multi signal in FRA system is mainly composed of PDG pump signal Raman interaction, and The optical effect of PMD value on PDG was significant; (4) using numerical method on the characteristics of multi pumped FRA system of PDG, the contents of the study include: forward pumping, backward pump mode and double pump FRA system respectively by pump signal, pump pump, signal and signal all the light waves between the Raman interaction generated by PDG; through the method of numerical calculation compared three kinds of pump power pump, pump wavelength and pump number effect on PDG.

【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN722

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