摘要
基于脉冲在光纤中传输所满足的非线性薛定谔方程(NLSE),采用数值计算的方法对脉冲在单根正色散光纤中演化为抛物线型自相似脉冲的传输特性进行研究.结果表明,合理地选取脉冲的初始能量和脉宽,脉冲在正色散光纤中演化成带有线性啁啾的自相似脉冲.进一步研究表明,输入脉冲的形状越接近自相似脉冲则其演化为抛物线型自相似脉冲越快,故高斯型脉冲与双曲正割型脉冲在相同能量下,高斯型脉冲有更短的最优光纤长度,且能演化为更优质的自相似脉冲.
Based on the nonlinear schrodinger equation of pulse propagation in fiber,the propagation properties of parabolic self-similar pulse in a normally dispersive fiber are investigated by numerical methods.The results show that when pulses have different initial energy and width,the Gaussian pulse can evolve into the parabolic self-similar pulse with a linear frequency chirp in a normally dispersive fiber.It＇s further investigated that the shape of the pulse＇ intensity closer to a parabolic form,the parabolic pulse evolves more fast,thus,Gaussian pulse evolves into a parabolic self-similar pulse of higher quantity in a shorter optimal fiber length than Sechant pulse with the same initial energy.
出处
《天津理工大学学报》
2011年第3期1-5,共5页
Journal of Tianjin University of Technology
基金
国家自然科学基金(60808004)
天津市自然科学基金(08JCYBJC14500)
关键词
非线性光学
数值模拟
正色散光纤
抛物线型自相似脉冲
nonlinear optics
numerical simulation
normally dispersive fiber
parabolic self-similar pulse
