Home Forums SYSTEM Problem connecting input and output

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    • #25270
      koll
      Participant

      Hi I got problem connecting my output port subsystem to another input port. Please help. Thank you. Please find attached OSD file

    • #25422
      alistu
      Participant

      Hi Koll,

      Please see if you intended to make connections as in the file attached. This is a common problem that I have also encountered many times, especially when I was using 32-bit OptiSystem (I don’t know if it has anything to do with that) and when I use a lot of subsystems.

      The problem is, you make a connection and then look inside a subsystem or save the file. After that, you see that connection is gone! And of course you cannot connect it again, as “cannot connect an already connected port”. But what is really going on is that the connection is established and if you close the software and then open the file again, you can see it there. So every time you see an already established connection not being there, restart the software.

      Regards

    • #25527
      alistu
      Participant

      Hi koll,

      The only thing I have done is replacing the WDM Demux with Ideal Demux (I could have just modified the WDM Demux characteristics instead of using ideal demux by the way). Please download and just run the simulation and verify if the BER in the upstream is acceptable.

      Regards

      • #25535
        koll
        Participant

        Hi But I would like to input frequency for the demux. 🙁 Could you show me how to ues wdm demux instead?

        thank you.

    • #25534
      koll
      Participant

      Hi But I would like to input frequency for the demux. 🙁 Could you show me how to ues wdm demux instead?

      thank you.

    • #25684
      Sasha
      Participant

      Hi All,

      I tried implementing the same WDM PON but I used the bidirectional feeder fiber and connected optical delay between feeder fiber and AWG. When I am running the simulation, Optisystem is closed.

      I attached a file here.

      Thanks in advance.

    • #25689
      kelly howard
      Participant

      hi i have changed APD to PIN and it run smoothly

    • #25691
      kelly howard
      Participant

      hi sasha,

      i tried to run the simulation u have upload with APD changed to PIN, the result is bad. The BER is 1 be it upstream or downstream

    • #25743
      Sasha
      Participant

      Hello Kelly,

      That is upstream. I changed the WDM demux Wavelength, now I am getting two eye diagrams properly.

      I designed WDM-PON, datarate = 10Gbps, channel spacing = 100Ghz, one bidirectinal feeder fiber, add an optical delay between feeder fiber and AWG.

      I am not getting the proper eye diagram. Do you have any idea, how to get ?

      Thanks in advance.

    • #25746
      Sasha
      Participant

      Hi all,

      One more question, I used bidrectional feeder fiber with wavelength = 1500nm but in WDM PON, I used different wavelength to transmit in the fiber, how it works?

      Thanks in advance.

    • #25755
      Sasha
      Participant

      Hi all,

      Here I have attached a file.

      Thanks in advance.

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