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在我国现有的光纤通信骨干网中,绝大部分速率为2.5 Gb/s。今后如在我国现有的2.5 Gb/s网络系统上进行密集波分复用(DWDM)升级,亦需要考虑偏振模色散(PMD)对系统容量升级的影响。采用十段高双折射光纤级联而成的偏振模色散模拟器模拟实际光纤,从信号中提取基带频率分量作为反馈信号,对2.5 Gb/s系统进行了偏振模色散自动补偿实验,并对反馈前后的系统进行了系统代价的测量和比较。实验结果表明,偏振模色散自动补偿能较大幅度地提高系统的偏振模色散容限值。
In China’s existing optical fiber communications backbone, the vast majority of the rate of 2.5 Gb / s. Future Dense Wavelength Division Multiplexing (DWDM) upgrades on our existing 2.5 Gb / s network systems also need to consider the impact of PMD on system capacity upgrades. Polarization mode dispersion simulator with ten high-birefringence fiber cascades was used to simulate actual optical fiber. The baseband frequency component was extracted from the signal as the feedback signal. The polarization mode dispersion auto-compensation experiment was carried out on 2.5 Gb / s system. The feedback System before and after the system cost of measurement and comparison. Experimental results show that the polarization mode dispersion automatic compensation can greatly improve the system’s polarization mode dispersion tolerance.