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Receiver bandwidth effects on complex modulation and detection using directly modulated lasers

机译：接收器带宽对复杂调制和检测的直接调制激光器的影响

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摘要

Directly modulated lasers (DMLs) have long been employed for short- and medium-reach optical communications due to their low cost. Recently, a new modulation scheme called complex modulated DMLs has been demonstrated showing a significant optical signal to noise ratio sensitivity enhancement compared with the traditional intensity-only detection scheme. However, chirp-induced optical spectrum broadening is inevitable in complex modulated systems, which may imply a need for high-bandwidth receivers. In this Letter, we study the impact of receiver bandwidth effects on the performance of complex modulation and coherent detection systems based on DMLs. We experimentally demonstrate that such systems exhibit a reasonable tolerance for the reduced receiver bandwidth. For 10 Gbaud 4-level pulse amplitude modulation signals, the required electrical bandwidth is as low as 8.5 and 7.5 GHz for 7% and 20% forward error correction, respectively. Therefore, it is feasible to realize DML-based complex modulated systems using cost-effective receivers with narrow bandwidth. (C) 2016 Optical Society of America
机译：由于其低成本，直接调制的激光器（DMLS）长期以来用于短路和中达光学通信。最近，已经证明了一种新的调制方案，其显示与传统的强度检测方案相比，显示了与传统的强度检测方案相比的显着的光学信号到噪声比灵敏度增强。然而，在复杂的调制系统中，啁啾感应光谱展会是不可避免的，这可能意味着需要高带宽接收器。在这封信中，我们研究了接收器带宽对基于DMLS的复杂调制和相干检测系统的性能的影响。我们通过实验证明这种系统对减少的接收器带宽表现出合理的公差。对于10 GBaud 4级脉冲幅度调制信号，所需的电带宽分别为8.5和7.5GHz，分别为7％和20％的前进纠错。因此，使用具有窄带宽的经济高效接收器实现基于DML的复模系统是可行的。 （c）2016年光学学会

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  • 来源
    《Optics Letters》 |2016年第9期|共4页
  • 作者

    Yuan Feng; Che Di; Shieh William;

  • 作者单位

    Univ Melbourne Dept Elect &

    Elect Engn Melbourne Vic 3010 Australia;

    Univ Melbourne Dept Elect &

    Elect Engn Melbourne Vic 3010 Australia;

    Univ Melbourne Dept Elect &

    Elect Engn Melbourne Vic 3010 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
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