基于交叉相位调制的孤子脉冲压缩效应研究

罗爱平; 徐文成; 陈伟成; 郭旗; 刘颂豪

中国激光, 2001, 28 (5): 421, 网络出版: 2006-08-10

基于交叉相位调制的孤子脉冲压缩效应研究

Soliton Pulse Compression Based on Cross-phase-modulation in Anomalous Dispersive Optical Fiber

论文大纲

罗爱平徐文成陈伟成郭旗刘颂豪

作者单位

华南师范大学量子电子学研究所广州 510631

交叉相位调制效应孤子脉冲压缩高压缩比脉冲的产生 cross-phase-modulation soliton pulse compression generation ofultra-short pulses

摘要

在负色散区，基本孤子在光纤中传输时其波形与脉宽保持不变。提出一种在负色散区利用交叉相位调制效应压缩基本孤子脉冲的新方法。采用分步傅里叶方法对非线性耦合方程进行了数值计算与模拟。研究了不同抽运功率、不同抽运脉冲啁啾参数以及不同脉宽对基本孤子脉冲压缩的影响。发现基本孤子脉冲不仅能够被压缩，而且光纤存在最佳压缩长度。在抽运功率一定的条件下，选取负啁啾的抽运脉冲，可获得更高压缩比的压缩光脉冲。另外，不同的脉冲宽度对孤子脉冲的压缩产生较大的影响，一般情况下，选用较窄的抽运脉冲易于产生较短的压缩光脉冲。

Abstract

In anomalous dispersivefiber, fundamental soliton pules have the desirable property i.e. their shape and pulsewidth are invariant during propagation along the fiber. In this paper, a new method tocompress fundamental soliton pulses in the anomalous dispersion regime throughcross-phase-modulation for pump pulse and soliton pulse is proposed. Two nonlinear coupledequations were established to describe the propagation of pulses in the fiber and solvednumerically. It is found that the fundamental soliton can be compressed by using themethod of the cross-phase modulation and exists an optimum value of fiber length in thecompression. It is also found that the pump pulse power, pump frequency chirp and variouspulse widths have great effects on soliton pulse compression. In order to obtain largecompression factor, pump pulses with negative chirp and narrow pulse-width are desirableselected.

参考文献

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罗爱平, 徐文成, 陈伟成, 郭旗, 刘颂豪. 基于交叉相位调制的孤子脉冲压缩效应研究[J]. 中国激光, 2001, 28(5): 421. 罗爱平, 徐文成, 陈伟成, 郭旗, 刘颂豪. Soliton Pulse Compression Based on Cross-phase-modulation in Anomalous Dispersive Optical Fiber[J]. Chinese Journal of Lasers, 2001, 28(5): 421.

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