【摘要】 通过函数和变量变换给出变系数非线性薛定谔方程的一个新的精确解,它可以用来描述非均匀光纤中的调制不稳定过程。基于这个精确解我们给出一类新的类提升脉冲串,并讨论该脉冲串的传输特性。结果表明,当类提升脉冲串能量大于某一阈值时类提升脉冲串可以稳定传输。同时我们还比较指数控制系统和理想系统中类提升脉冲串的传输,结果表明选择合适的控制系统可以抑制脉冲间的相互作用,这对增加光通信的传输比特率是非常有益的。更多还原

【Abstract】 Using direct variable and function transformation,the paper presents a new exact solution,describing the modulation instability process in inhomogeneous fibers,for the generalized nonlinear Schrdinger equation with variable coefficients.Based on this exact solution,a like-raised pulse train is proposed,and the transmission properties are discussed in detail.The results show that the like-raised pulse train can be transported stably along inhomogeneous fiber when the energy of each pulse in the pulse train is lager than some threshold value.Furthermore,the numerical results show that using a suitable control system can reduce the interaction between pulses in the pulse train by making a comparison between the ideal system and the exponentially distributed control system.更多还原