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负折射介质中高阶非线性效应所致啁啾的研究

, PP. 346-351

Keywords: 非线性光学,啁啾,分步傅立叶法,负折射介质,二阶非线性色散

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Abstract:

利用分步傅立叶法对负折射介质中的广义非线性薛定谔方程进行数值模拟,进而分别得到自相位调制、赝五阶非线性、自陡峭、二阶非线性色散所致啁啾及各项非线性所致总啁啾的演变图。从啁啾上分析了负折射介质中各项非线性效应在脉冲传输时的作用,结果表明负折射介质中,自陡系数取值的正负可控使脉冲中心位置可向前后沿偏移;在正常色散区,赝五阶非线性系数为负时加速脉冲的展宽,二阶非线性色散项系数取正时使脉冲展宽,取负时使脉冲变窄。

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