光学学报, 2010, 30 (s1): s100201, 网络出版: 2010-12-08
40 Gb/s偏分复用差分四相移键控传输系统中新型电均衡技术的研究
A novel Electric Equalization in 40 Gb/s Pol-Mux RZ-DQPSK Transmission
光通信 电色散补偿 电均衡 前馈式均衡器 最大似然估计均衡 optical communications electronic dispersion compensation (EDC) equalization feed-forward equalizer (FFE) maximam likelihood sequence estimator (MLSE)
摘要
主要研究了利用接收机侧的电域均衡进行色散补偿的问题。相比其他均衡技术,最大似然序列估计(MLSE)均衡能够更好地减少由群速度色散、偏振模色散、光纤非线性等引起的功率代价。在40 Gb/s偏分复用归零差分四相移相键控(RZ-DQPSK)系统中,研究了基于传统MLSE均衡结合前馈式均衡(FFE)的新型均衡技术。实验结果表明,结合FFE的MLSE均衡有更高的色散容忍度,在没有任何光域补偿的条件下传输超过280 km依然可以保证误码率低于10-3。
Abstract
Investigation of the performance of electronic equalization applied to receiver in the optical communication systems is introduced. Compared with other digital equalizers, maximum likelihood sequence estimator (MLSE) equalizer seems to be the most promising candidate solution to mitigate impairments caused by chromatic dispersion (CD), polarization mode dispersion (PMD) and fiber’s nonlinearity. The performance of a novel MLSE digital equalizer technology is analyzed and it is combined with feed-forward equalizer (FFE) receivers in optical 40 Gb/s polarization-maltiplexed (Pol-Mux) RZ-DQPSK systems. The MLSE receiver combined with FFE technique can achieve a higher CD tolerance and a long haul transmission with 280 km without any optical dispersion compensation and meanwhile the bit error ratio (BER) of the receiver is less than 10-3.
林密, 张锦南, 袁学光, 张阳安, 张明伦, 黄永清. 40 Gb/s偏分复用差分四相移键控传输系统中新型电均衡技术的研究[J]. 光学学报, 2010, 30(s1): s100201. Lin Mi, Zhang Jinnan, Yuan Xueguang, Zhang Yangan, Zhang Minglun, Huang Yongqing. A novel Electric Equalization in 40 Gb/s Pol-Mux RZ-DQPSK Transmission[J]. Acta Optica Sinica, 2010, 30(s1): s100201.