Modeling Self-Similar Optical Pulse Compression in Nonlinear Fiber Bragg Grating Using Coupled-Mode Equations
Modeling Self-Similar Optical Pulse Compression in Nonlinear Fiber Bragg Grating Using Coupled-Mode Equations
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DOI：
10.1109/jlt.2011.2126039
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发表时间：
2011-05
影响因子：
4.7
通讯作者：
Qian Li;P. Wai;K. Senthilnathan;K. Nakkeeran
中科院分区：
文献类型：
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作者：
Qian Li;P. Wai;K. Senthilnathan;K. Nakkeeran
利用广义非线性耦合模方程（NLCMEs），研究了色散指数递减的非线性光纤布拉格光栅（NFBG）光子带隙（PBG）结构附近的自相似啁啾光孤子对近无模光脉冲的压缩.分析了全色散特性和光子带隙效应。研究发现，脉冲中心频率与NFBG布拉格频率的频率失谐量与NFBG耦合系数的比值是NFBG光脉冲压缩器的一个重要设计参数。研究了频率失谐量与耦合系数之比、光栅长度、初始啁啾、初始色散、初始脉宽对自相似光脉冲压缩的影响。研究了双曲正割脉冲和高斯脉冲的压缩，以及初始脉宽变化对光脉冲压缩的影响。
Nearly pedestal-free optical pulse compression using self-similar chirped optical solitons near the photonic bandgap (PBG) structure of nonlinear fiber Bragg gratings (NFBGs) with exponentially decreasing dispersion is investigated using the generalized nonlinear coupled-mode equations (NLCMEs). The full dispersion characteristics and the effect of PBG are included. We find that the ratio of the frequency detune of the pulse's center frequency from the Bragg frequency of the NFBG to coupling coefficient of the NFBG is an important design parameter of the NFBG optical pulse compressor. We carried out a comprehensive study on the effect of the ratio of frequency detune to coupling coefficient, grating length, initial chirp, initial dispersion, and initial pulsewidth on the self-similar optical pulse compression. We also studied the compression of both the hyperbolic secant and Gaussian-shaped pulses and the effect of variation in the initial pulsewidth on the optical pulse compression.