单模光纤中基于交叉相位调制的压缩脉冲对产生

基于波长位于反常色散区强泵浦脉冲的交叉相位调制,通过对波长位于正常色散区的弱脉冲在单模光纤中的传输进行数值模拟,得出了一种压缩脉冲的新方法.计算结果表明,在零色散波长位于弱脉冲波长和泵浦脉冲波长中间附近的情况下,交叉相位调制(XPM)与群速度色散(GVD)的共同作用能使弱脉冲演化成比其初始宽度窄得多的脉冲对.同时我们还发现,泵浦脉冲的相对于信号脉冲初始峰值功率愈高,初始相对宽度越小,所得弱脉冲的压缩比和压缩后脉冲峰值功率愈高,压缩到最窄时所需光纤长度越短.最后对基于这一压缩的物理机制作了详尽的分析.

GENERATION OF COMPRESSED PULSE PAIR BASED ON CROSS-PHASE MODULATION IN SINGLE-MODE FIBERS

Through computer simulation,the compression of weak optical pulses in the normal group-velocity dispersion region by higher-order solitons in the anomalous group-velocity dispersion region of single-mode fibers is analyzed both qualitatively and quantitatively.The results show that the copropagating a weak pulse with an intense pump pulse can lead to generation of compressed pulse pair in an optical fiber whose minimum-dispersion wavelength is chosen such that it falls between the pump and the signal wavelength.Numerical simulation also shows that the higher the initial relative peak power of higher-order solitons is,the higher compression ratio and compressed peak power of pulse pair are.At last,the physical mechanism based on this compression is analyzed detailedly.