Home Forums SYSTEM How to make a relative propagation delay between two SMF?

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    • #16006
      mai fouad
      Participant

      if i have two SMF (single mode fiber) and i want to make a relative propagation delay between them about 1 ps/km , how to set this parameter in optisystem optical fiber ?

    • #16008
      Heitor Galvao
      Participant

      You open the properties of the fiber optic block (which already comes as standard in SMF optisystem) will in Differential Group Delay and make the necessary modification

    • #16011
      Heitor Galvao
      Participant

      See this small file

    • #16014
      mai fouad
      Participant

      but DGD differential group delay related to delay between two polarization modes not delay between propagation time between two different fibers !!!

      • #16015
        Heitor Galvao
        Participant

        Yes this related to polarization mode dispersion (PMD), thanks for the correction

    • #16024
      Heitor Galvao
      Participant

      You can do the following you can go into global variables create variable delay with the respective unit. The definition of the optical delay is the following “Generates optical signal delays. The delay is added by sending NULL signals to the output port. “With this you put between the amplifier output that accompanies the first fiber with the entry of the second most fiber amplifier

    • #16027
      Heitor Galvao
      Participant

      This block “optical fiber” by default the optisystem offers it with characteristics of SMF

    • #16028
      Heitor Galvao
      Participant

      And the dispersion compensated so reducing the length of second fiber in half, and fold the dispersion looks like this
      (D1) * L1 + D2*L2 = 0
      16.75 + 50 * (25) * (-33.5) = 0

    • #16029
      Heitor Galvao
      Participant

      I have helped

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