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《Chinese Journal of Lasers》 2004-05
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Effect of Quintic Nonlinearity on Modulational Instability in the Anomalous-Dispersion Regime of Fiber

REN Zhi jun, WANG Jing, YANG Ai ling, WANG Zhen li, WANG Jin (Optical & Optoelectronics Laboratory, Ocean University of China, Qingdao, Shandong 266071, China)  
In this paper, the effect of quintic nonlinearity on modulational instability in the anomalous dispersion regime of self focusing fiber from extended nonlinear Schrodinger equation is considered. The result shows: the effects of quintic nonlinearity on modulational instability is few, and it is reasonable that quintic nonlinearity can be ignored when input power is small. The effects of quintic nonlinearity on modulational instability are more and more evident when input power increases. Quintic nonlinearity increases the ranges of spectrum and the values of gain of modulational instability, and finally decreases the range of input power that modulational instability will produce. Modulational instability can′t appear when input power continuously increases and exceeds the threshold value.
【CateGory Index】: TN253
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