放大器间距对应用相敏光放大器的平均光孤子系统传输性能影响的研究  

The Effect of Amplifier Spacing on the Transmission Performance of Average-soliton System Using PSA as In-Line Amplifier

作　　者：钱胜[1] 林洪榕[2] 李跃辉[2] 杨爱霞[2] 

机构地区：[1]杭州电子科技大学通信分院,杭州310008 [2]南京邮电大学通信工程系,南京210003

出　　处：《光子学报》2005年第6期889-894,共6页Acta Photonica Sinica

基　　金：江苏省自然科学基金(BK2002032)资助课题

摘　　要：本文采用计算机系统仿真方法,研究了相敏光放大器(PSA)作为在线放大器时光孤子系统中放大器间距对系统传输性能的影响,研究了平均孤子传输方案.仿真结果表明当放大器间距与色散距离比值小于0.1时,系统能够保持良好的传输性能;在比值大于0.1情况下,系统的传输性能劣化较快.这是由于PSA增益的相敏特性导致孤子脉冲能量的损失所引起的.采用微调放大器增益的方法能在一定程度上补偿PSA放大导致的孤子能量损失,但这种改善是以增大孤子脉冲旁瓣幅度为代价的.In this paper, the effect of amplifier spacing on the performance of average-soliton transmission system using PSA as in-line amplifiers has been analyzed theoretically by computer simulation. Our simulation results show that when the ratio of amplifier spacing to dispersion distance is below 0.1, the performance of soliton system is well enough. But when it is above 0.1, the system performance is deteriorated quickly. The reason is that due to the phase sensitivity of its gain, PSA can cause soliton energy loss, thus result in the amplitude of soliton pulse descending significantly after long distance transmission. Raising PSA′s gain a little can compensate the loss, thus improve system performance. But the improvement is at cost of heightening the wing amplitude of soliton pulse.

关 键 词：光孤子传输 相敏光放大器 平均孤子 放大器间距 系统仿真 

分 类 号：TN929.11[电子电信—通信与信息系统]