Spatial solitons in linearly and nonlinearly amplitude-modulated optical lattices

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• 作者：Guoyan Yin ; Jiangbo Zheng ; Liangwei Dong
• 关键词：Chirped lattices ; Twisted solitons
• 刊名：Optics Communications
• 出版年：2010
• 出版时间：15 February 2010
• 年：2010
• 卷：283
• 期：4
• 页码：583-590
• 全文大小：951 K

文摘

We demonstrated that linearly and nonlinearly amplitude-modulated (chirped) harmonic lattices can support odd and even solitons in both focusing and defocusing saturable media. The modulated lattice modifies the profiles and enlarges the stability domains of solitons, comparing with the unchirped one. Twisted solitons, or “soliton trains” whose profiles exhibit multi-peak structures can also be supported by linearly and nonlinearly chirped lattices. In sharp contrast with periodic lattices, chirped lattices remarkably broaden the existence and stability domains of twisted solitons, especially for solitons with more components. While even solitons in focusing media and twisted solitons in defocusing media are unstable, odd and twisted solitons in focusing media are stable in relatively wide parameter windows. Chirped lattice can be used as a linear guidance to realize the oscillation of solitons which is impossible in unchirped lattice.