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bit error rate

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(joined May 2014)
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how can I get Bit error rate between 10^-9 to 10^-12 in 16-channel EDFA-WDM system . I have attached the system design.

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Responses (6):

    • #13511
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      anita sharma
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      how can I get Bit error rate between 10^-9 to 10^-12 in 16-channel EDFA-WDM system . I have attached the system design.

      Attachments:
    • #13515
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      Abdallah Ismail
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      This is achieved using FEC,I didn’t see the file till now because the key in the university but if you didn’t add FEC in your design,Your BER will 10e-3 and not 10e-9 because this is value is after FEC correction.

    • #13517
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      Abdallah Ismail
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      The BER Analyzer is not accurate tool to measure BER,Try to use BER test set,it is more accurate but as i said,you expect BER in the range of 10e-3 because you didn’t use FEC correction.
      Regards,

      +1
    • #13518
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      anita sharma
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      thank u for the reply… but I don’t know how to use FEC correction and I didn’t find BER test set in optisystem 7.

    • #13540
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      Damian Marek
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      Hi Anita,

      I found some design errors in your project file:

      1) The channels defined in your WDM Demux do not correspond to the WDM Transmitter channels (1546 nm, 1546.8 nm . . .) I fixed this.

      2) The Low pass filters did not have the proper bandwidth, because they were using the Symbol rate (but each channel is a bit stream). I fixed this but I would actually recommend using a Bessel filter here. I think Raised Cosine Filter’s are more popular when working with more advanced modulation schemes.

      I’ve attached the project file where I achieved ~2e-8 BER. Note that I am using OptiSystem 13.0, so you might have trouble opening it.

      Attachments:
      +1
    • #13561
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      Abdallah Ismail
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      Dear Damian,
      Is it possible to get this BER without FEC correction?

      • #13566
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        Damian Marek
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        Yup, I didn’t change anything besides what I mentioned. This is a very simple system with only a short EDFA segment though.

        Regards

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