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Application Research and Simulation Analysis of Signal Transfer Characteristics in Optical Fibers

Author: LiuZhiChao
Tutor: ZhuJun
School: Anhui University
Course: Communication and Information System
Keywords: Nonlinear Schrodinger equation Group velocity dispersion Third-order dispersion Power flow equations Electric field signal propagation model
CLC: TN929.11
Type: Master's thesis
Year: 2010
Downloads: 130
Quote: 1
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Abstract


A transmission medium used in the optical fiber communication are mainly single - mode fiber and multimode fiber, the fiber dispersion, loss , chirp parameters will affect the signal transmission characteristics, and reduces the communication capacity . Single-mode fiber is generally used for long distance signal transmission analysis for single-mode fiber transmission characteristics , most with step-by-step Fourier method for solving nonlinear Schrodinger equation resulting in transfer expressions ; multimode fiber generally used to short - distance signal transmission , analysis multimode fiber is generally based on the power flow equations to analyze the time domain of the digital pulse broadening , improved model is also relying on the methods to approximate the power transfer function . Although the method is able to describe the transmission of digital signals in multimode fiber , but consider the transmission of analog signals , or need to get the baseband and RF transmission function will be limited , the need to study the signal transmission characteristics of the new method , this paper attempts to combine the electric field signal the propagation model analysis methods related research . This study mainly three aspects: First , for multimode fiber , the power flow equations and the electric field signal propagation model are two ways to do a theoretical comparison and simulation analysis , simulation results show that , compared to the power of the electric field signal propagation model flow equation is better , more comprehensive study of the transmission characteristics of the optical signal , to provide a theoretical basis for the application ; for single-mode fiber , by step Fourier method for solving nonlinear Schrodinger equation , consider the second order and third-order dispersion of transmission expression, and then the simulation analysis by setting different parameters , verify the correctness of the expression ; third is for the single-mode, multi - mode optical fiber applied research, optical frequency division multiplexing (OFDM) technology and the mode groups division multiplexing (MGDM) multimode fiber , an introduction to the basic principles , analysis of their strengths and weaknesses , G.652 fiber transmission system then through opticsimu software simulation analysis , some meaningful results.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications > Optical fiber communication
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