Re: Optical dispersion in fibers

[brian whatcott <inet@INTELLISYS.NET>]

At 07:53 PM 1/28/00 -0600, brian whatcott wrote:

One way has been the graded fiber which
refracts peripheral rays towards the axis in a time locked fashion.

At 04:02 1/29/00 -0500, John D wrote:

> The peripheral rays issue has to do with the spatial degrees of
> freedom.  That's a problem, even in the absence of dispersion.
> Solving the spatial problem doesn't get rid of dispersion (which
> occurs in frequency-space, even in a fiber with a single spatial mode).


...It's important that a graded fiber lets an off axis ray
travel faster while it returns to the axis - that's how the
wavefront decay  can be minimized.

 Or to put it more simply: the achromatic action in the frequency
domain is determined by the displacement in the spatial domain,





brian whatcott <inet@intellisys.net>
Altus OK