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首页> 外文期刊>IEE Proceedings. Part J >Effectiveness of gain control in EDFAs against traffic with different levels of bursty behaviour
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Effectiveness of gain control in EDFAs against traffic with different levels of bursty behaviour

机译：EDFA中增益控制针对具有不同突发行为级别的流量的有效性

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摘要

Previous publications have addressed the impact of bursty, self-similar traffic on erbium-doped fibre amplifiers (EDFA). Several gain control techniques have been suggested to combat the gain fluctuations of EDFA with this type of traffic. The effectiveness of two such methods are investigated, namely highly inverted amplifiers and all-optical gain clamping, while varying the parameters characterising the burstiness of the sources. While previous publications have focused on the effect of the average load or activity factor, the paper further investigate the dependence on the relative variability of the packet burst lengths (ON times), and lengths of the interburst idle times (OFF times). Both gain control methods reduce the output power and signal-to-noise ratio excursions with respect to a standard amplifier chain. The authors find that, for an eight channel WDM system and a cascade of six EDFAs, all-optical gain clamping can reduce the variations by a factor of five, provided adequate power is present in the clamping laser, while highly inverted amplifiers have variations reduced by a factor of two. The authors find that, in a clamped chain, the source activity factor does not uniquely determine the required level of lasing power. The authors also deduce that information on the relative variability of ON and OFF times is essential.
机译：以前的出版物已经解决了突发性，自相似流量对掺do光纤放大器（EDFA）的影响。已经提出了几种增益控制技术来克服这种类型的业务对EDFA的增益波动。研究了两种此类方法的有效性，即高度反相放大器和全光增益钳制，同时改变了表征信号源突发性的参数。尽管先前的出版物集中在平均负载或活动因子的影响上，但本文进一步研究了对数据包突发长度（ON时间）和突发空闲时间（OFF时间）长度的相对变化的依赖性。相对于标准放大器链，两种增益控制方法都可以降低输出功率和信噪比偏移。作者发现，对于一个八通道WDM系统和六个EDFA的级联，如果在钳位激光器中存在足够的功率，则全光增益钳位可以将偏差减小五倍，而高度倒置放大器的偏差可以减小减少了两倍。作者发现，在受约束的链中，源活动因子并不能唯一地确定所需的激光功率水平。作者还得出结论，有关开和关时间的相对变化的信息至关重要。

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