中文摘要：

DPSK调制方式和色散管理孤子（DMS）传输方案相结合的新的传输机制能抵制噪声和非线性损伤，在高速多通道光传输系统中具有突出优点。采用变分法研究同时存在光纤损耗、ASE噪声、孤子互作用等多种扰动因素的DPSK色散管理孤子系统的传输特性，在频域导频滤波控制方案下，导出了孤子各特征参数随传输距离的演化方程。对40Gb／s长距离DPSK色散管理孤子系统的传输特性进行了数值模拟，其结果和理论分析一致。并通过Optisystem软件作进一步仿真，论证了该系统零频移稳定传输的可行性。

英文摘要：

The new transmission mechanism in combination of differential phase shift keying （DPSK） modulation format with dispersion managed soliton （DMS） transmission technology is proposed, and this mechanism could depress the noise and nonlinear damage, and is of outstanding advantages in the high-speed multi-channel optical transmission system. With varitional method and in simultaneous presence of multiple perturbations including fiber loss, amplifier spontaneous emission （ASE） noise, soliton interaction, the transmission characteristics of DPSK dispersion management soliton system arestudied. The evolution equations of soliton performance parameters versus distance are deduced under the control scheme of frequency-guiding filtering. The numerical simulation on the long-haul DPSK dispersion management soliton system at the rat of 40Gb/s is done, and the results are quite identical with the theoretical analyses. And the further simulation with Optisystem software indicates that this system could realize stable transmission with zero frequency shift.