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《Journal of Optoelectronics.laser》 2002-08
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Modulation Instability of Cross-phase Modulation in Decreasing Dispersion Fibers

YANG Ai ling, WANG Jing, MIAO Hong li, REN Zhi jun (Department of Physics,Ocean University of Qingdao,Qingdao 266003,China)  
Modulation instability resulted from cross phase modulation(XPM) in decreasing dispersion fiber(DDF) is presented from nonlinear Schrodinger equation.The gain spectrums as a function of incident power P 1/P 2 and axilly varying dispersion parameter are given respectively.The results show that the spectrum width in anomalous dispersion regime is larger than that of normal dispersion regime,whats more,the gain peak value is also larger.The ratio of the gain spectrum width in DDF and in common fiber increases as exponential function with the product of axilly varying dispersion parameter and propagation distance.The DDF in anomalous dispersion regime is a good kind of fiber to produce modulation instability.
【CateGory Index】: TN929.11
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