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为提高长距离、高速率光纤通信系统性能,提出了基于后置补偿方案的非完全补偿技术。分别采用前置、后置、对称色散管理方案,搭建了10 Gb/s和40 Gb/s传输系统,为进一步研究非线性效应与色散补偿关系,首先从单信道系统入手,分析系统残余色散与非线性效应关系,其次搭建了8×40 Gb/s波分复用系统,引入了自相位调制和不同信道间的交叉相位调制效应。结果表明:在低速率和高速率通信场合中,后置和对称补偿方案都要优于前置。采用后置补偿技术时,完全色散补偿适用于低入射光功率,而非完全补偿则在高入射光功率时可让系统保持更好的性能,Q值可达到8.9。
In order to improve the performance of long-distance and high-rate optical fiber communication system, an incomplete compensation technique based on post-compensation scheme is proposed. The transmission systems of 10 Gb / s and 40 Gb / s are set up respectively by the front-end, back-end and symmetrical dispersion management schemes. In order to further study the relationship between the nonlinear effect and the dispersion compensation, firstly, the single-channel system is used to analyze the residual dispersion and Nonlinear effect. Secondly, a 8 × 40 Gb / s wavelength division multiplexing system is built, which introduces self-phase modulation and cross-phase modulation effect between different channels. The results show that in both low-rate and high-rate communication scenarios, the back-end and symmetrical compensation schemes are better than the front-end. When using post-compensation techniques, full dispersion compensation applies to low incident optical power, rather than full compensation, which allows the system to maintain better performance at high incident optical power with a Q of 8.9.