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《Acta Photonica Sinica》 2008-07
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Modulational Instability in the Region of Minimum Group-velocity Dispersion with Quintic Nonlinearity

HU Tao-ping1,2,LUO Qing3,YAN Sen-lin3,WANG Jing3(1 Lab of Photonics and Optical Communications,Electronic Science and Engineering College,Southeast University,Nanjing 210096,China)(2 College of Science,Nanjing Forestry University,Nanjing 210037,China)(3 Department of Physics,Nanjing Xiaozhuang College,Nanjing 210017,China)  
Taking into account fiber loss,high-order dispersion and high-order nonlinearity,the modulation instability in the region of minimum group-velocity dispersion is investigated based on the extended nonlinear Schrdinger equation.The effects of fourth-order dispersion and quintic nonlinearity to the gain spectra are analyzed.The results show that the fourth-order dispersion,which increases the width of the gain spectra in the anomalous dispersion regime,dominates the modulation instability when the second-order dispersion approaches the minimum value at the so-called zero dispersion wavelength.In the normal dispersion regime of fiber,the positive(negative)quintic nonlinearity will make the width and the peak value of the gain spectra larger(smaller).But in the anomalous dispersion regime,the quintic nonlinearity only changes the peak value of the gain spectra and almost does not influence the width of the gain spectra.
【Fund】: 南京林业大学科技创新基金(CX05-070-3)资助
【CateGory Index】: TN252
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