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Chinese Journal of Lasers, Volume. 50, Issue 6, 0606002(2023)

MIMO Pre‑Equalization Based Mode Crosstalk Mitigation Method in Mode Division Multiplexing Passive Optical Network

Ouyang Yuanjiang, Qianwu Zhang*, Yetian Huang, Shuaihang Duan, Kechen Yuan, Yingchun Li, Yingxiong Song, and Min Wang
Author Affiliations
  • Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (28)
    Cited By (3)
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    Figures & Tables(11)
    Principal diagram of MIMO pre-equalization based mode crosstalk mitigation in MDM-PON downlink

    Fig. 1. Principal diagram of MIMO pre-equalization based mode crosstalk mitigation in MDM-PON downlink

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    Frame structure for MDM-PON downlink channel impulse response estimation

    Fig. 2. Frame structure for MDM-PON downlink channel impulse response estimation

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    MIMO pre-equalizer structure at the transmitter. (a) Without dispersion pre-compensation; (b) with dispersion pre-compensation

    Fig. 3. MIMO pre-equalizer structure at the transmitter. (a) Without dispersion pre-compensation; (b) with dispersion pre-compensation

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    Tap coefficient calculation process for MIMO pre-equalizer at the transmitter

    Fig. 4. Tap coefficient calculation process for MIMO pre-equalizer at the transmitter

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    Block diagram for MDM transmission simulation system using linear polarization mode

    Fig. 5. Block diagram for MDM transmission simulation system using linear polarization mode

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    BER versus transmitted optical power with or without crosstalk under OBTB and 5 km FMF.

    Fig. 6. BER versus transmitted optical power with or without crosstalk under OBTB and 5 km FMF.

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    BER versus transmitted optical power with crosstalk, with MIMO pre-equalization and with ZF precoding under OBTB and 5 km FMF. (a) LP01 mode; (b) LP11 mode; (c) LP21 mode; (d) LP31 mode

    Fig. 7. BER versus transmitted optical power with crosstalk, with MIMO pre-equalization and with ZF precoding under OBTB and 5 km FMF. (a) LP01 mode; (b) LP11 mode; (c) LP21 mode; (d) LP31 mode

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    BER versus transmitted optical power with crosstalk and MIMO pre-equalization (with or without dispersion pre-compensation) under 5 km FMF. (a) LP01 mode; (b) LP11 mode; (c) LP21 mode; (d) LP31 mode

    Fig. 8. BER versus transmitted optical power with crosstalk and MIMO pre-equalization (with or without dispersion pre-compensation) under 5 km FMF. (a) LP01 mode; (b) LP11 mode; (c) LP21 mode; (d) LP31 mode

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    • Table 1. Parameters of FMF used in simulation

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      Table 1. Parameters of FMF used in simulation

      ParameterContent
      Transversal index profileStep index
      Core refractive index1.46
      Index contrast0.008
      Core diameter /μm16

      Effective index

      （LP01，LP11，LP21，LP02，LP31，LP12）

      		1.458，1.456，1.453，1.452，1.45，1.449
      Attenuation /（dB·km-1）0.2

      Chromatic dispersion /（ps·nm-1·km-1）

      （LP01，LP11，LP21，LP02，LP31，LP12）

      		25，28，29，25，23，-48

    • Table 2. Coupling coefficient matrix of Mode MUX in simulation

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      Table 2. Coupling coefficient matrix of Mode MUX in simulation

      InputOutput
      LP01LP11aLP21aLP31a
      LP011.000.100.080.09
      LP11a0.091.000.080.08
      LP21a0.060.141.000.10
      LP31a0.060.080.151.00

    • Table 3. Power transfer matrix between Mode MUX input and Mode DeMUX output under OBTB and 5 km FMF

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      Table 3. Power transfer matrix between Mode MUX input and Mode DeMUX output under OBTB and 5 km FMF

      Input power /dBmOutput power /dBm
      LP01LP11LP21LP31
      OBTBFMFOBTBFMFOBTBFMFOBTBFMF
      0（LP01）-0.03-1.31-22.62-20.70-24.76-21.33-23.40-20.22
      0（LP11）-20.98-19.37-3.07-5.92-24.80-21.40-24.80-20.73
      0（LP21）-24.48-20.82-19.92-19.28-3.08-5.38-22.58-19.81
      0（LP31）-24.19-20.70-24.61-21.26-19.51-18.98-3.09-3.65
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    Ouyang Yuanjiang, Qianwu Zhang, Yetian Huang, Shuaihang Duan, Kechen Yuan, Yingchun Li, Yingxiong Song, Min Wang. MIMO Pre‑Equalization Based Mode Crosstalk Mitigation Method in Mode Division Multiplexing Passive Optical Network[J]. Chinese Journal of Lasers, 2023, 50(6): 0606002

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    Paper Information

    Category: Fiber optics and optical communication

    Received: Mar. 21, 2022

    Accepted: May. 10, 2022

    Published Online: Feb. 23, 2023

    The Author Email: Zhang Qianwu (zhangqianwu@shu.edu.cn)

    DOI:10.3788/CJL220688

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology