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Baseband linearity and interference effects in intensity modulated and direct detected optical MIMO systems

机译：强度调制和直接检测光学MIMO系统的基带线性和干扰效应

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摘要

In short reach intensity modulated and direct detected (IM/DD) optical multiple-input multiple-output (MIMO) systems linear equalization strategies are commonly applied. However, the square-law detector inherently is a non-linear system element. This work investigates this discrepancy and shows for which laser types and under which mode coupling conditions baseband linearity applies for the first time. Based on a system model that integrates a multitude of aspects, e.g. the phase state of each fiber mode and mode coupling, it is shown that the received signal consists of a linear component and one that can be considered as interference. The simulation and measurement results highlight that only MIMO setups with weak and no mode cross-talk can be considered as linear. Systems with high mode cross-talk are impaired by significant interference, resulting in a highly degraded bit-error rate performance.
机译：在短暂的范围内强度调制和直接检测到（IM / DD）光学多输入多输出（MIMO）系统的线性均衡策略通常应用。然而，平方 - 法检测器固有地是非线性系统元件。这项工作调查了这种差异，并显示了哪种激光类型，并且在哪个模式耦合条件下基带线性的第一次适用。基于整合多个方面的系统模型，例如，每个光纤模式和模式耦合的相位状态，示出了接收信号由线性分量和可以被认为是干扰的。仿真和测量结果突出显示只有弱和无模式串扰的MIMO设置可以被视为线性。具有高模式串扰的系统因显着的干扰而受到损害，导致高度降级的位误差率性能。

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  • 来源
    《Optical fiber technology》 |2020年第12期|102329.1-102329.8|共8页
  • 作者

    Sandmann Andre; Ahrens Andreas; Lochmann Steffen; Pachnicke Stephan;

  • 作者单位

    Hsch Wismar Dept Elect Engn & Comp Sci Philipp Muller Str 14 D-23966 Wismar Germany|Univ Kiel Chair Commun Kaiserstr 2 D-24143 Kiel Germany;

    Hsch Wismar Dept Elect Engn & Comp Sci Philipp Muller Str 14 D-23966 Wismar Germany;

    Hsch Wismar Dept Elect Engn & Comp Sci Philipp Muller Str 14 D-23966 Wismar Germany;

    Univ Kiel Chair Commun Kaiserstr 2 D-24143 Kiel Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Optical MIMO; IM/DD; Baseband linearity; Interference;

    机译：光学MIMO;IM / DD;基带线性;干扰;

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