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高阶效应对微结构光纤中超连续谱产生的影响

, PP. 596-601

Keywords: 非线性光学,微结构光纤,分布傅立叶方法,超连续光谱,高阶效应

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Abstract:

采用分布傅立叶方法求解了广义非线性薛定谔方程(GNSE),数值模拟了飞秒激光脉冲在微结构光纤中的非线性传输和超连续谱的产生,详细分析了脉冲拉曼散射、自陡峭效应以及三阶色散对超连续光谱产生的影响。分析结果表明超短脉冲在微结构光纤中传输时出现孤子自频移现象,同时也发现脉冲内拉曼散射和自相位调制的联合作用导致高阶孤子分裂,光谱得到极大展宽,在时域中出现两个滞后的拉曼孤子,三阶色散和自陡效应对光谱的形状影响较小,起着与脉冲内拉曼散射相反的作用,自陡效应比三阶色散效应对光脉冲的影响大一些。

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