补偿光纤的参数对自相似脉冲压缩效应的影响  

Effects of compensative fiber's parameters on self-similar pulse compression

作　　者：吕华[1] 张巧芬[2] 

机构地区：[1]广东工业大学实验教学部,广东广州510006 [2]广东工业大学信息工程学院,广东广州510006

出　　处：《量子电子学报》2009年第5期607-612,共6页Chinese Journal of Quantum Electronics

基　　金：广东工业大学青年基金资助项目(072022)

摘　　要：从非线性薛定谔(NLS)方程出发,用数值方法研究了在自相似脉冲压缩技术中反常色散补偿光纤的群速度色散(GVD)参量和非线性参量对脉冲压缩效应的影响。结果表明,补偿光纤的GVD参量对压缩因子和脉冲峰值功率的影响是周期性的,随着GVD参量数值的增大,脉冲能量按集中-分散-集中的规律周期性变化,且变化周期逐渐增大,一周期内的能量转移加剧;每次能量集中时,脉宽接近压缩极限。最佳光纤长度随着GVD参量数值的增加而下降,但不受非线性参量的影响。另一方面,非线性参量的增大会降低压缩因子,不利于脉冲压缩。通过优化选择补偿光纤参数,能够接近脉宽压缩极限,提高脉冲压缩质量。The pulse compression is affected by group-velocity dispersion parameter （GVD） and nonlinear parameter of the anomalous-dispersion compensative fiber in self-similar pulse compression technique. This effect was studied with numerical calculation based on nonlinear SchrSdinger （NLS） equation. The results show that compensative fiber＇s GVD parameters affect compression factor and peak power of compressed pulse periodically. Pulse energy concentrates, disperses, and then concentrates in every period. As the magnitude of GVD parameter increases, period interval becomes longer and more energy diverts. Every time when energy concentrates, the pulse width approaches the compression limit. Optimal fiber length is a decreasing function of the magnitude of GVD parameter, but it has nothing to do with nonlinear parameter. On the other hand, the increase of nonlinear parameter reduces compression factor, which is bad for pulse compression. By optimizing the parameters of the compensative fiber, pulse width can attain its limit and high quality pulse is obtained.

关 键 词：非线性光学 自相似脉冲压缩 非线性薛定谔方程 补偿光纤 色散渐减光纤 常数色散光纤 

分 类 号：TN929.11[电子电信—通信与信息系统]