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Optimal Bandwidth for Distributed Multi-Pump Raman Amplifier Based on Hybrid Genetic Algorithm
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Based on a hybrid genetic algorithm, the bandwidth for distributed multi-pump Raman amplifier (DMRA) is optimized. Optimal results show that signal bandwidth △γ can be evidently broadened by means of increasing the number of pumps, △γ decreases with the increase of Raman gain and with the improvement of flatness property, and the hybrid erbium-doped fibre amplifier and DMRA can availably overcome the weakness of pure DMRA. 相似文献
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基于Si材料可调F—P滤波器提出了改善10Gb/s城域网(MAN)直接调制半导体激光器(DML)输出性能的方法。模拟和实验结果表明,采用可调F—P滤波器,可以减少激光脉冲啁啾、抑制过冲、减小ASK噪声,但抖动却有所增加;在50km无色散补偿单模光纤(SMF)的传输实验中,可看到明显的眼图改善。 相似文献
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The effect of distributed Raman amplification (DRA) on the optical signal to noise ratio (OSNR) of an all optical network (AON) is examined by analyzing two types of node isolated principal (NIP). Based on the parameters used in calculation, it is found that in the first case of NIP, the OSNR of a signal passing through such AON can be improved by about 8 dB compared with no DRA. Whereas in the second case of NIP, the OSNR of the signal can be reduced by 11 dB. This kind of phenomena is analyzed and attributed to the dependence of noise figure of amplification system on the way of the active amplification utilization. 相似文献
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