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Research on photonic generation of quadrupling triangular-shaped waveform using external modulation

机译:利用外部调制光子产生四倍三角波的研究

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摘要

We propose an improved approach to generate frequency-quadrupled triangular-shaped waveform signals based on two cascaded modulators. A dual-parallel Mach-Zehnder modulator (DP-MZM) is employed to provide the quadrupling RF modulation, after which two primary optical sidebands (+/- 2nd) are generated in spectrum. Then a dual-drive Mach-Zehnder modulator (DD-MZM) is followed to perform the optical double sideband (ODSB) modulation and signal with four sidebands (+/- 2nd and +/- 6th) is obtained. By adjusting modulation index carefully, the power ratio of +/- 2nd and +/- 6th sidebands can be tuned to 9.5 dB. A piece of single mode fiber (SMF) is applied to remove the undesired harmonic. The expression of optical intensity is approximately equal to the Fourier expansion of ideal triangular-shaped waveform. The principle is illustrated by theory, simulation, and experiment. Finally, triangular-shaped waveform signals with repetition rate of 8 GHz, 12 GHz, 16 GHz and 20 GHz are generated.
机译:我们提出了一种改进的方法,用于基于两个级联的调制器来生成频率四倍的三角形波形信号。采用双并行马赫曾德尔调制器(DP-MZM)提供四倍的RF调制,此后在频谱中产生两个主光学边带(+/- 2nd)。然后,跟随双驱动马赫曾德尔调制器(DD-MZM)进行光学双边带(ODSB)调制,并获得四个边带(+/-第2和+/- 6)的信号。通过仔细调节调制指数,+ /-2和+/- 6边带的功率比可以调整到9.5 dB。应用单模光纤(SMF)去除不需要的谐波。光强度的表达近似等于理想三角形波形的傅立叶展开。通过理论,仿真和实验来说明该原理。最后,产生具有8 GHz,12 GHz,16 GHz和20 GHz重复率的三角形波形信号。

著录项

  • 来源
    《Optical fiber technology》 |2018年第11期|352-358|共7页
  • 作者单位

    Beijing Jiaotong Univ, Key Lab All Opt Network & Adv Telecommun Network, Beijing 100044, Peoples R China;

    Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48105 USA;

  • 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

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