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Studies On Propagation Of Chirped Femtosecond Soliton-like Pulses

Posted on:2006-01-28Degree:MasterType:Thesis
Country:ChinaCandidate:X J ShiFull Text:PDF
GTID:2168360155456999Subject:Optics
Abstract/Summary:PDF Full Text Request
We will investigate the propagation characteristic of the chirped femtosecond soliton-like solution. Firstly, we present the fundamental equation which govern the chirped femtosecond soliton-like solution -higher order Ginzburg-Landau Equation; Then, based on the fundamental equation, we present the chirped femtosecond soliton-like solution by ansatz method and discuss the transmission property of the soliton-like solution in optical fiber. We study the stability of the soliton-like wave by the perturbation method and the numerical simulation, and get some useful results. These results are helpful to improve the communication capacity, and to increase the communication bit rate.The main contents are as follows:1. High order Ginzburg-Landau equation with constant coefficient is studied. First, chirped femtosecond soliton-like solution in explicit form is obtained by using ansatz method, and then the linear stability for the soliton-like solution is analyzed by variational method. By direct numerical simulations, we discuss the stability of the soliton-like solution and interaction between neighboring soliton-like waves. The results show that one may realize the stable propagation of the pulses by adjusting the system parameters. As an example, we can realize the stable transmission of the soliton-like solution by adjusting the chirped parameter.2. Based on the concept of soliton control, we consider the higher-order Ginzburg-Landau Equation with variable coefficient, and the chirped femtosecond soliton-like solution in explicit form is obtained by using ansatz method.
Keywords/Search Tags:Ginzburg-Landau equation, variable coefficient, Soliton-like solution, variational method, FFT
PDF Full Text Request
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