Re: Dispersion in an optical fibre


"Peter Fairbrother" <zenadsl6186@xxxxxxxxx> wrote in message
news:47a308f8$0$8426$db0fefd9@xxxxxxxxxxxxxxxxx
| Ockham wrote:
| > "Peter Fairbrother" <zenadsl6186@xxxxxxxxx> wrote in message
| > news:47a2babe$0$8414$db0fefd9@xxxxxxxxxxxxxxxxx
| >
| > | Putting this a bit more simply, modes are a bit like standing waves in
| > | an organ pipe. In multimode fiber the standing waves are different for
| > | each photon, so the different photons take slightly less or more time
to
| > | travel the length of the fiber.
| > |
| > | Single mode fiber attempts to ensure that all the standing waves are
the
| > | same.
| >
| > Wavelength: 400 - 700 nanometres.
| > Length of fibre: 400- 700 meters.
|
| More like 500 kilometers for a long fiber.
|
I didn't want to stretch your imagination too far. :-)


| > Are you saying the length of the fibre set the frequency as the length
| > of an organ pipe does?
| >
|
| No - it's more like the width of the fiber sets the mode and the
| "standing wave" pattern, especially in single mode fiber, though it's a
| bit more complex than that.

How fast does a standing wave travel and what is its pattern?

.

Relevant Pages

  • Re: Dispersion in an optical fibre
    ... In multimode fiber the standing waves are different for ... | travel the length of the fiber. ... Are you saying the length of the fibre set the frequency as the length ... of an organ pipe does? ...
    (sci.physics)
  • Re: Dispersion in an optical fibre
    ... Ockham wrote: ... In multimode fiber the standing waves are different for ... |> of an organ pipe does? ...
    (sci.physics)
  • Re: Dispersion in an optical fibre
    ... In multimode fiber the standing waves are different for ... | travel the length of the fiber. ... of an organ pipe does? ... "standing wave" pattern, especially in single mode fiber, though it's a bit more complex than that. ...
    (sci.physics)