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    #37198
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    Tung Tran Van
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    I have uploaded my project simulating Raman Amplifier which compensating loss of 100km fiber, but it does not work. Plz help. Thanks

    #36934
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    Tung Tran Van
    Participant

    I have same problem . Signal is not amplified when using coupler. Plz help me. I use Optisys v14. Thanks

    #34040
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    Tung Tran Van
    Participant

    In theory, Raman amplifier’s NF is small (or even negative), but in the sample .osd file, NF is very high. How to reduce it to resemble theory???

    #33618
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    Tung Tran Van
    Participant

    Could you run my attached project and see if there is error?
    Thanks you

    #33592
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    Tung Tran Van
    Participant

    My laptop has 8GB ram and optisystem consume only about 30% memory when calculating. so I think the cause is not due to weak laptop configuration.

    #33554
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    Tung Tran Van
    Participant

    I use Optisystem v7.0 and OS windows 10

    #33332
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    Tung Tran Van
    Participant

    Thanks FAYIQA NAQSHBANDI
    as I know, a iteration parameter is often used in the bidirectional or ring network design . If my system is the point – point transmission , it can improve ouput OSNR of the ORA ?

    #33147
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    Tung Tran Van
    Participant

    Hi all,
    in theory, an optical Raman amplifiers (ORA) increases the OSNR of input signals, but my designed ORA reduces OSNR wdm channels greatly.
    what should I do to improve my ORA?
    Thanks all

    #32661
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    Tung Tran Van
    Participant

    Yep Ranjeet Kumar.
    why those BER analyzers dont work? Is my project wrong or does optical ring controller work incorrectly?

    #32647
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    Tung Tran Van
    Participant

    any one help me? I think the optical ring controller works incorrectly.

    #32633
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    Tung Tran Van
    Participant

    Hi alisu and Ranjeet Kumar
    In a project “Interchannel crosstalk at ADM in a ring network”, I have replaced the photodetector PINs and filters by optical receivers.
    I dont understand why I just measured BER of 2 nodes (node 1 & node 4).
    ?

    #32445
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    Tung Tran Van
    Participant

    I attached my project.

    #30787
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    Tung Tran Van
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    Thanks alistu
    I used DCFs in every nodes, they are between PAs & OAs. I set dispersion.dat for SMFs (G652) & DispersionDCFNew.dat for DCFs (named DCMs). So I think dispersion is compensated. Moreover, the bad received signal only at the nodes with Raman Amps.

    #30764
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    Tung Tran Van
    Participant

    Hi all.
    Because my project is so complicated, I have deleted some components in it to look better. At some nodes with Raman Amp (node3, node 4), the received signal quality is so bad, Q factor is low. Plz, give me a suggestion to improve system performance.
    I attach my project with wavelength assignment schemes.
    Thank you so much.

    #30511
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    Tung Tran Van
    Participant

    Thanks all.

    @Fayiqa
    Naqshbandi: :(. I’m using OptiSys v7, so I can’t open your osd file.
    But when increasing the input laser power, Optisys will caculate too slowly because of nonlinear effects. 🙁