两种复周期调制晶格中孤子的开关特性分析

Analysis of the Switching Characters of Soliton in Two Optical Lattices with Modulation of Multiple Periods

对提出的两种复周期Kerr非线性调制光晶格中的孤子开关特性进行了研究,并与单周期余弦型调制晶格的情形进行了比较。通过数值模拟,分析了3种不同模型对孤子脉冲能量的保持情况,以及注入相同孤子脉冲时,脉冲被晶格俘获前可穿越的晶格通道的数量。研究发现,当注入脉冲的能量范围相同时,3种模型中孤子的开关通道数有较大差别;而在穿越通道数相同的情况下,开关效应的响应时间却不相同。

Two multiple-period modulation optical lattices with Kerr-type nonlinear medium were proposed. The switching characters of soliton in these lattices were studied and compared with that of the single-period cosine-type modulation optical lattices. The stabilities of the energy of soliton pulse in all of these optical lattices was numerically analyzed, and the numbers of the channels which were traversed by soliton pulse were numerically calculated before the soliton pulse was trapped in the lattices channel. Within the same energy region, the numbers of switching channels of the soliton were obviously different. And for the same numbers of channels traversed, the response time were different.