Home Forums SYSTEM calculation of dispersion values

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    • #19820
      Anamika Basnotra
      Participant

      hiii
      how to check the dispersion value in optisystem 13
      in its earlier versions, the end of WDM multiplexer or the end of optical fiber gave the dispersion values but not in optisystem 13

    • #19850
      Abhishek Shrama
      Participant

      Are you looking for the value of dispersion which is set in SMF-28 by default or the broaden pulse after several km of SMF??

    • #19866
      Anamika Basnotra
      Participant

      no abhishek not the default 1
      the one which is accumulated after travelling a certain distance

    • #19869
      Ashu verma
      Participant

      yes Anamika,i also want to know this thing.Can we simply calculate dispersion like
      if D=17ps/nm/km
      and length of fiber=10
      so my dispersion comes out to be=10*17=170 ps ??
      is this work like this????

    • #19870
      Anamika Basnotra
      Participant

      earlier i had optisystem 9 in which it gave the dispersion values directly at the end of optical fiber and demultiplexer also
      i dont know about optisystem 13

    • #19878
      Dr Rk Sethi
      Participant

      Hi Anamika,
      Can you tell, how did you get the value of dispersion at the end of the optical fiber which is accumulated after travelling a certain distance in Optisystem 9.

    • #19881
      Ravil
      Participant

      Hi Anamika,

      I am not sure as well about your way of getting dispersion at the end of optical fiber without any calculations. What was your procedure and what kind of meter / analyzer did you use? Can you share it with us, please?

    • #19886
      Anamika Basnotra
      Participant

      i did’t used any special component for calculating the dispersion
      after running ur design
      the point from where the optical fiber is connected to other components, u just have to place ur cursor at that point and it gave the dispersion values. even noise and power values it used to give, but in OptiSystem 9

    • #19896
      Ashu verma
      Participant

      Deleted(internet error)

    • #19897
      Ashu verma
      Participant

      Anamika i found a way to calculate dispersion.You can place OTDV on the starting and ending point of your optical fiber.Deselect the automatic range and do this operation
      1)Select BIT
      2)Start =0
      3)End value=10,20 (how many bits you want to see
      4) Right click,select marker
      5)place on leading edge and trailing edge of pulse,you will get the time of one pulse
      6)same you do after SMF and you will get value of dispersed pulse

      Please correct me if i am wrong anywhere.

      +1
    • #19901
      Anamika Basnotra
      Participant

      can u plz elaborate
      from where i have to select BIT ???

    • #19904
      Ravil
      Participant

      Hi Anamika,

      Thanks for your explanation! I see your point and approach. However, the main question which I have in this case is how will you distinguish the dispersion in optical fiber (caused by wavelength dependence of refractive index or material dispersion) from pulse broadening due to nonlinear effects in optical fiber? The only way I can think of is disabling / enabling nonlinearities when you performing your measurements…

    • #19906
      Anamika Basnotra
      Participant

      yeah
      bt how can this be done now with optisystem 13

    • #19933
      Abhishek Shrama
      Participant

      Hi,Anamika as Sam sung said you can select BIT from OTDV
      Here i am attaching a screen shot.
      Once you will do this then proceed as Sam sung mentioned Earlier.

    • #19941
      Anamika Basnotra
      Participant

      thnkyou abhishek and sam sung for making me understand.

    • #19949
      Ashu verma
      Participant

      Welcome Anamika,I am also new to optisystem ans have lot of questions.I am working over it so that understand it better.Also thank you Abhishek to support my point .

    • #19961
      Anamika Basnotra
      Participant

      SAME HERE

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