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Disadvantagês of Stêp Indêx Fibêr

  1. May 27, 2014 #1
    Hello experts!

    I wonder if there are any disadvantagês of Stêp Indêx Fibêr?

    I searched for my knowledge but only found advantagês.

    Thank you all.
     
  2. jcsd
  3. May 27, 2014 #2

    UltrafastPED

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    "The most common refractive index profile for a graded-index fiber is very nearly parabolic. The parabolic profile results in continual refocusing of the rays in the core, and minimizes modal dispersion."

    http://en.wikipedia.org/wiki/Graded-index_fiber
     
  4. May 28, 2014 #3
    Sorry. Did you read my question properly? I asked about step indexed fiber not graded index fiber.
     
  5. May 28, 2014 #4

    davenn

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    Had you read the link UltrafastPED gave, you would have got your answer

    The most significant disadvantage of step indexed fibre is that of its high level of modal dispersion
    This makes it much less efficient than graded index fibre.

    Step indexed fibre is OK for single mode transmission, where-as graded index fibre is preferred for multi-mode transmissions where the dispersion level is much lower

    Regards
    Dave
     
    Last edited: May 28, 2014
  6. May 28, 2014 #5

    adjacent

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    Why did you use those weird e's in the title?
    I though it was some specialised term
     
  7. May 28, 2014 #6

    davenn

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    maybe he has a fancy Multi-language keyboard :wink:



    D
     
  8. May 29, 2014 #7
    Yes, I have read the link. Whenever we google anything then 80% wikipedia opens. So why didn't I read that link. But I want to know your view. I have read. I thought to know from experts.
     
  9. May 29, 2014 #8
    modal dispersion in multimode step index fiber not in single/monomode step fiber.
     
  10. May 29, 2014 #9

    UltrafastPED

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    You have to learn to read for understanding; the experts - such as your university professors - will only point you in the correct direction. The teacher does not impart understanding; that comes from the effort of the student to understand the presentation, with, perhaps, some specific questions that show the effort that has been made.
     
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