Current Optics and Photonics

  • 제8권4호
  • /
  • Pages.345-354
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  • 2024
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  • 2508-7266(pISSN)
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  • 2508-7274(eISSN)
한국광학회 (Optical Society of Korea)
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A Novel Frequency-octupling Millimeter Wave ROF Without Bit Walk-off Effect Based on MZM and an Insertion Pilot Signal

  • Bin Li (School of Information and Communication Engineering, Communication University of China) ;
  • Xu Chen (School of Information and Communication Engineering, Communication University of China) ;
  • Siyuan Dai (School of Information and Communication Engineering, Communication University of China) ;
  • Xinqiao Chen (School of Information and Communication Engineering, Communication University of China)
  • 투고 : 2024.01.29
  • 심사 : 2024.06.03
  • 발행 : 2024.08.25
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초록

The bit walk-off effect caused by fiber dispersion and carrier reuse in the base station (BS) are two key problems in radio-over-fiber (ROF) systems. In this paper, a novel frequency-octupling ROF system based on the Mach-Zehnder modulator (MZM) is proposed, which can overcome the bit walk-off effect and realize carrier reuse by inserting pilot signals. Theoretical analysis and simulation verification of the system are carried out. Under the condition of a Q factor greater than 6, the optical fiber transmission distance of the upper and lower links is more than 290 km and 80 km, respectively. The influence of the main device parameters of the system on the Q factor is analyzed when they deviate from their designed values. The system designed in this paper can not only effectively overcome the bit walk-off effect, but also solve the problem of downlink performance degradation and the limitation of tunability caused by conventional carrier reuse in ROF. The system can greatly increase the transmission distance and improve the performance of the system and has an important application prospect in ROF.

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과제정보

This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. 3132018XNG1856, Grant No. 2018CUCTJ084).

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