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首页> 外文期刊>Optical engineering >Few-mode erbium-doped fiber amplifier design method based on the signal-pump overlap integral
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Few-mode erbium-doped fiber amplifier design method based on the signal-pump overlap integral

机译：基于信号泵重叠积分的少模掺fiber光纤放大器设计方法

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摘要

Space-division multiplexing allows an increase of link capacity by using either multicore or single-core few-mode (FM) optical fibers. In the case of FM systems, each mode carries its own data stream and long-haul transmission can be hampered by the use of conventional erbium-doped fiber amplifiers (EDFAs), since because of distinct field profile configurations, each mode experiences a different value of optical gain. The role of the FM-EDFA designer, usually done by solving rate and propagation equations, is to define both the fiber cross-section and the pumping configuration to provide the best possible mode equalization of optical gain and noise figure. An optimization method is proposed here based on the definition of a figure of merit related to the equalization of the pump-mode signal overlap integral, significantly reducing computation time and allowing a multiobjective optimization approach. The results obtained were validated against the solution provided by the full set of rate and propagation equations and we conducted an FM-EDFA optimization case study. Our double-ring Er doping profile design requires a single 180-mW LP_1 pump to provide a mean gain of 21.3 dB, within 0.6 dB of equalization for each of the four modes considered.
机译：空分复用可以通过使用多芯或单芯少模（FM）光纤来增加链路容量。在FM系统的情况下，每种模式都携带自己的数据流，并且通过使用常规的掺-光纤放大器（EDFA）可能会妨碍长距离传输，因为由于场配置不同，每种模式都具有不同的值的光学增益。 FM-EDFA设计人员的作用通常是通过求解速率和传播方程来完成的，是定义光纤的横截面和泵浦配置，以提供光学增益和噪声系数的最佳可能模式均衡。在此，根据与泵浦模式信号重叠积分的均衡有关的品质因数的定义，提出了一种优化方法，从而显着减少了计算时间并允许采用多目标优化方法。相对于完整的速率和传播方程组提供的解决方案对获得的结果进行了验证，我们进行了FM-EDFA优化案例研究。我们的双环Er掺杂曲线设计需要一个180 mW的LP_1泵来提供21.3 dB的平均增益，对于所考虑的四种模式中的每种模式，均值均在0.6 dB以内。

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