Optical wave breaking and soliton trains generation due to cross-phase modulation in an optical fiber with quintic nonlinearity

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• 作者：Xianqiong Zhong^a ; ^b ; ^{xianqiongzhong@163.com" class="auth_mail" title="E-mail the corresponding author} ; Ke Cheng^a ; Xiaoxia Zhang^b ; Yong Liu^b ; Xiantong Du^a
• 关键词：Nonlinear optics ; Optical wave breaking ; Cross-phase modulation ; Quintic nonlinearity
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：127
• 期：2
• 页码：920-927
• 全文大小：3106 K

文摘

Based on the extended coupled nonlinear Schrödinger equations in an optical fiber with quintic nonlinearity (QN), the approximate analytical frequency chirps and the critical distances for the cross-phase modulation induced optical wave breaking (OWB) are discussed for the initial Gaussian optical pulses. Evolutions of the frequency chirps, shapes and spectra of pulses are numerically calculated in the normal dispersion regime. It is shown that, the approximate analytical frequency chirps accords well with the numerical ones at the initial evolution stages of the pulses. And the calculated approximate critical OWB distances accord well with the numerical ones only for the traditional OWB. In addition, for the positive QN and the negative one but with small absolute values, the traditional OWB can be observed. While for the negative QN with large absolute values, non-traditional OWB may occur. Namely, soliton pulse trains may develop during the pulse propagation.