Home Forums KNOWLEDGE Negative noise figure

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    • #88483
      Debarun Chakraborty
      Participant

      Why are we getting negative noise figure for EDFA in optisystem? I am cascading EDFA and TDFA to design a hybrid optical amplifier. The gain characteristics are good but we are getting negative noise figure. Can you explain why?
      Some papers it is written that effective noise figure can be negative.

    • #88489
      Ahmad Atieh
      Moderator

      Hello,
      One thing to check is the input and output ports’ connection to the analyzer.
      You may email me the project as Zip file to check it. My email is ahmad.atieh@optiwave.com. You may get negative effective noise figure in some cases that incorporate Raman amplification. I don’t expect to get it in EDFA/TDFA.
      Regards,
      Ahmad

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