应用相敏光放大克服光孤子传输系统中Gordon-Haus限制的研究

通过计算机系统仿真研究了应用相敏光放大器(PSA)作为在线放大器的光孤子传输系统，并与相应的掺铒光纤放大器(EDFA)光孤子系统作了比较。仿真了平均孤子和动态孤子两种传输方案．研究结果表明，由于PSA不存在ASE噪声，应用PSA作为在线放大器可以克服光孤子系统中的Gordon-Haus限制．对平均孤子，在没有附加其它的孤子控制技术的情况下，PSA系统孤子的稳定传输距离得到极大的延长．对动态孤子，PSA亦表现出良好的抑制脉冲展宽效果，但脉冲的幅度经长距离传输后显著下降．

To overcome Gordon-Haus restriction in soliton transmission system using in-line phase-sensitive amplifiers

The transmission performance of soliton communication system using phase-sensitive amplifiers (PSAs) as in-line amplifiers has been theoretically analyzed by computer simulation. For comparison, we also simulated the performance of soliton system using erbium-doped fiber amplifiers (EDFAs) as in-line amplifiers. Our simulation considered both average-soliton regime and dynamic-soliton regime. The simulation results show that due to no ASE noise in PSAs, using PSAs as in-line amplifiers in soliton system, the Gordon-Haus restriction has been overcome. For average-soliton, in the condition of no additional soliton control techniques, the soliton stable transmission distance has been lengthened greatly. For dynamic-soliton, PSA also has a good behavior of suppressing pulse broadening. But after long distance transmission, the amplitude of soliton pulse descends significantly.