摘要
以非线性耦合模理论为基础,用数值计算的方法分析了光纤光栅非线性孤子的特性。结果表明,在较弱光脉冲输入时,脉冲被展宽幅度降低;在强光脉冲输入时,脉冲的幅度,速度和脉宽保持不变,孤子形成;当更强光脉冲输入时,脉冲被压缩同时产生随距离而变的线性啁啾。当波长位于负色散区的弱脉冲和位于正常色散区的强泵浦脉冲共同传输时,输入弱脉冲被压缩。
Under the basis of nonlinear coupled mode theory, nonlinear gap soliton properties of fiber Bragg grating are studied by using numerical computing method. The results show that the width of pulse is expanded and the amplitude is attenuated for the low intensity pulse input; the width, amplitude and speed of the pulse remain the same for the high intensity pulse input, thus nonlinear gap soliton is formed; the width of the pulse is compressed for very high intensity pulse input, but a linear chirp which changes with the propagation distance is produced at the same time; the width of the weak pulse is compressed for the input of low intensity pulse with its wavelength situated in negative dispersion area and high intensity pump pulse with its wavelength situated in positive dispersion area.
出处
《信息技术》
2007年第12期57-60,共4页
Information Technology
