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首页> 外文期刊>Journal of Lightwave Technology >A Microwave Photonics Equalizer for Overcoming Dispersion-Induced Distortions on Wideband Signals in Radio-Over-Fiber Links
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A Microwave Photonics Equalizer for Overcoming Dispersion-Induced Distortions on Wideband Signals in Radio-Over-Fiber Links

机译：一种用于克服光纤无线电链路中宽带信号上色散引起的失真的微波光子均衡器

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摘要

Chromatic dispersion (CD) has been considered as a significant issue that needs to he addressed over the past decades. Nowadays, as the bandwidth of radio frequency signals has expanded to multi-gigahertz, CD becomes increasingly troublesome for some wideband signals such as linear frequency modulated waveform (LFMW), which requires a flat amplitude response and a linear phase response. In this paper, we first investigate the CD-induced amplitude distortion and phase distortion that a wideband signal will suffer in traditional double-sideband (DSB) modulated and single-sideband (SSB) modulated radio-over-fiber (RoF) links with an emphasis on the LFMW. The detrimental impacts of the CD-induced distortions are subsequently discussed based on the pulse compression performance. Then, a two-tap microwave photonics equalizer (MPE) model is proposed and its operating principle for overcoming the CD-induced distortions is demonstrated. Based on the model, we design the MPE, which is mainly composed of an integrated dual-polarization dual-parallel Mach-Zehnder modulator and a differential group delay module. In the proofof-concept experiment, the RoF link utilizing the proposed MPE is built, and a 1-10 GHz LFMW is transmitted over the 66.3-km single-mode fiber. Thanks to the MPE, both CD-induced amplitude distortion and phase distortion are successfully compensated. Pulse compression results show that the pulse, compared with the signal transmitted in the SSB-haled link.
机译：在过去的几十年中，色散一直被认为是一个重要的问题。如今，随着射频信号的带宽扩展到数千兆赫兹，CD对于某些宽带信号（例如线性调频波形（LFMW））变得越来越麻烦，它需要平坦的幅度响应和线性相位响应。在本文中，我们首先研究CD引起的幅度失真和相位失真，宽带信号在传统的双边带（DSB）调制和单边带（SSB）调制的光纤无线电（RoF）链路中会受到干扰，强调LFMW。随后将基于脉冲压缩性能来讨论CD引起的失真的有害影响。然后，提出了两抽头微波光子均衡器（MPE）模型，并证明了其克服CD引起的畸变的工作原理。基于该模型，我们设计了MPE，该MPE主要由集成的双极化双并行Mach-Zehnder调制器和差分群时延模块组成。在概念验证实验中，利用建议的MPE构建了RoF链路，并在66.3公里的单模光纤上传输了1-10 GHz的LFMW。多亏了MPE，CD引起的幅度失真和相位失真都得到了成功的补偿。脉冲压缩结果表明，与在SSB暂停链路中传输的信号相比，该脉冲。

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  • 来源
    《Journal of Lightwave Technology》 |2019年第3期|736-743|共8页
  • 作者

    Han Guanyu; Li Shangyuan; Wang Haojie; Xue Xiaoxiao; Zheng Xiaoping;

  • 作者单位

    Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China;

    Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China;

    Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China;

    Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China;

    Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Chromatic dispersion; equalizer; radio over fiber;

    机译：色散;均衡器;光纤上的无线电;

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