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DWDM System

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(joined June 2015)
Participant

Hi everyone,
I am having problem in designing DWDM system with channel spacing of 25 GHZ or 50 GHZ.
I have designed DWDM system with 100GHZ channel spacing, but find no results when when i decrease Channel spacing to
25 GHZ. I have used symmetrical compensation technique with different advanced modulation formats MDRZ, CSRZ and DRZ.
Following parameters used are 40gbps bit rate, variable transmission length.
We use advanced modulation formats because CSRZ has narrow optical spectrum then the conventional RZ format
and high tolerance to group velocity dispersion (GVP) and mixed effect of self phase modulation (SPM).
DRZ transmitter of their optical modulation bandwidth DRZ format is very
attractive. It can be compressed to the data bit rate B that
is half- bandwidth of NRZ format 2B.
How could i reduce channel spacing.
Suggest me some ways so that i could get the expected results.
Here i am uploading the osd file of DRZ DWDM system.

Seeking your response.

Attachments:

Responses (30):

    • #36730
      Profile Photo
      Rajguru M. Mohan
      Participant

      Hi everyone,
      I am having problem in designing DWDM system with channel spacing of 25 GHZ or 50 GHZ.
      I have designed DWDM system with 100GHZ channel spacing, but find no results when when i decrease Channel spacing to
      25 GHZ. I have used symmetrical compensation technique with different advanced modulation formats MDRZ, CSRZ and DRZ.
      Following parameters used are 40gbps bit rate, variable transmission length.
      We use advanced modulation formats because CSRZ has narrow optical spectrum then the conventional RZ format
      and high tolerance to group velocity dispersion (GVP) and mixed effect of self phase modulation (SPM).
      DRZ transmitter of their optical modulation bandwidth DRZ format is very
      attractive. It can be compressed to the data bit rate B that
      is half- bandwidth of NRZ format 2B.
      How could i reduce channel spacing.
      Suggest me some ways so that i could get the expected results.
      Here i am uploading the osd file of DRZ DWDM system.

      Seeking your response.

      Attachments:
    • #36784
      Profile Photo
      deepak jha
      Participant

      Hi Rajguru,

      I am unable to open your .osd file… Try uploading it …will surely try to be of help…

      Thanks and regards

      +3
    • #36795
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      nagesh kuknoor
      Participant

      Hi Rajguru,

      Are you using unequal channel spacing?
      Thanks

      +1
    • #36832
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      shafeen al yasin
      Participant

      Hello Rajguru,
      Agree with Deepak. Your file is not opening some sort of error

      +3
    • #36837
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      Manoj Kumar
      Participant

      Hello Rajguru,

      Agree with other forum members… I suggest you to upload your file again…

      Regards

      +2
    • #36872
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      Rajguru M. Mohan
      Participant

      Hi nagesh kuknoor,

      I have used symmetrical channel spacing in my design.
      It is simple DWDM design using Symmetrical dispersion compensation technique.
      With data rate of 40 gbps.

      I have used 8 users in my design.

      Again i am uploading the osd file of DRZ, MDRZ and CSRZ modulation formats DWDM system
      Hope this time it will not shows any error.
      I have no problem in opening these files.
      Which version of optisystem are you using.

      Seeking your response.

      +3
      • #36900
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        nagesh kuknoor
        Participant

        Hello Rajguru,

        Thank you for responding. I was just inquiring about the channel spacing i thought you were using unequal channel spacing. Which dispersion compensation technique are you using exactly for your design?
        Regards

        +1
      • #36942
        Profile Photo
        shafeen al yasin
        Participant

        Hi Rajguru
        I tried again but i am not able to open it. I am using version 14 trial version.

        Regards
        Shafeen

      • #37645

        HELLO RAJGURU..
        I would suggest you to keep the channel spacing as small as possible becuase increasing the channel spacing can introduce non linear effects. Hope it will help you..

        Thanks and Regards
        FAYIQA

        +7
    • #36929
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      Domail Singh
      Participant

      Hello Rajguru,
      What is the purpose for reducing channel Spacing?

      Regards
      Domail

    • #36940
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      Manoj Kumar
      Participant

      Hi Rajguru,

      There is no problem opening the design file now… I also want to ask what is the purpose of channel spacing ?

      Thanks and regards

      +1
    • #36954
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      shafeen al yasin
      Participant

      Hi All,
      Is anyone able to open this file. I am not able to open it. I am using the latest version but evaluation trial version..

      +2
    • #36961
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      gaurav rajput
      Participant

      Hi all,

      I am also not able to open the .osd file which Rajguru has uploaded…

      Regards

      +1
    • #36963
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      gaurav rajput
      Participant

      Hi also,

      I am using optisystem 14 trial version but am still not able to open the file…

      Regards

      +1
    • #37103
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      Manoj Kumar
      Participant

      Hi all,

      I AM USING OPTISYSTEM 13 and have no problem in opening the file..

      Regards

    • #37104
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      gaurav rajput
      Participant

      Hi all,

      May be there might be some sort of compatibility issue between the different software versions…

      Regards

    • #37113
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      Manoj Kumar
      Participant

      Hi Manoj,

      Well I agree to your point of view,it might be some sort of compatibility issue..

      Regards

    • #37118
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      jyoti raina
      Spectator

      hi rajguru sir..
      i am also not able to open your file..which version are you using?

      with regards
      jyoti

      +1

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