Optoelectronics Letters

, Volume 14, Issue 5, pp 336–341 | Cite as

Research on mode division multiplexer with graded-index distribution, low loss and low crosstalk

  • Qian-Qian Liu (刘倩倩)
  • Hong-Jun Zheng (郑宏军)Email author
  • Xin Li (黎昕)
  • Cheng-Lin Bai (白成林)
  • Wei-Sheng Hu (胡卫生)
  • Ru-Yuan Yu (于如愿)


A graded-index mode division multiplexer with low loss and low crosstalk is proposed. The transmission channel adopts a pure silica core with large effective area to achieve low attenuation, which effectively reduces the splicing loss with pure silica core few-mode transmission fiber. Low differential mode group delay is realized by using graded-index distribution. Also the effective index difference of the modes is greater than 0.5×10−3 to ensure low crosstalk between modes. The performance of the mode division multiplexer is investigated using the beam propagation method and full-vector finite element method. The result shows that the coupling efficiency of multiplexer is better than −0.479 dB, and the extinction ratio is higher than 31.2 dB in the wavelength of 1 400–1 700 nm. In C band, the average coupling efficiency of all mode channels of multiplexer is better than that of −0.140 dB, which shows flatness. The proposed scheme is an effective way to implement a multiplexer with low crosstalk, low loss, low fusion loss, high coupling efficiency, high extinction ratio and wide operating band.

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Copyright information

© Tianjin University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Qian-Qian Liu (刘倩倩)
    • 1
  • Hong-Jun Zheng (郑宏军)
    • 1
    Email author
  • Xin Li (黎昕)
    • 1
  • Cheng-Lin Bai (白成林)
    • 1
  • Wei-Sheng Hu (胡卫生)
    • 2
  • Ru-Yuan Yu (于如愿)
    • 1
  1. 1.Shandong Provincial Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information TechnologyLiaocheng UniversityLiaochengChina
  2. 2.State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghaiChina

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