色散渐减光纤链中孤子的周期集总放大和恢复  

Periodically Lumped Amplification and Recovery of Soliton in Dispersion-Decreasing Optic Fiber Link

作　　者：王丽[1] 杨荣草[1] 贾鹤萍[1] 田晋平[2] 薛文瑞[1] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006 [2]山西大学计算中心,山西太原030006

出　　处：《光学学报》2017年第6期186-193,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61271160);山西省自然科学基金(2016011038)

摘　　要：基于包含渐减色散和周期集总放大的变系数非线性薛定谔方程,通过一种简单变换,解析出其精确孤子解,并研究了色散渐减周期集总放大(DDPLA)光纤链路中孤子的传输、放大和恢复。研究结果表明,当光纤色散、损耗和放大器增益相互平衡时,色散渐减光纤链路中可实现孤子的周期放大和恢复;而且可根据光纤损耗和放大周期来设置放大器的增益,或根据光纤损耗和放大器增益来设置放大周期,从而实现孤子的周期性放大或恢复。另外,采用数值计算的方法讨论了孤子的稳定性和相邻孤子间的相互作用。研究结果对实际的色散渐减周期集总光纤链中孤子的传输及周期放大链路的精确配置具有一定的理论指导意义。The exact soliton solution is analyzed based on the variable coefficient nonlinear Schr9 dinger equation including the decreasing dispersion and periodically lumped-amplification by a simple transformation.Meanwhile,the transmission,amplification and recovery of soliton is achieved in dispersion-decreasing and periodically lumpedamplification（DDPLA）optic fiber link.The results show that periodic amplification and recovery of the soliton could be realized through the balance among the dispersion,loss and amplifier gain.Moreover,regulating the gain of the amplifier according to the fiber loss and the amplification period,or adjusting the amplification period on the basis of the fiber loss and the amplifier gain,the periodic amplification or recovery of soliton obtained in the DDPLA could be realized.In addition,the stability of soliton and interaction between adjacent solitons are discussed numerically.The obtained results are theoretical significance to soliton transmission and the exact configuration of periodic amplifier in real dispersion-decreasing and periodic amplification link.

关 键 词：非线性光学 孤子 恢复和放大 变换 色散 损耗 增益 

分 类 号：O437[机械工程—光学工程]