Re: Estimating the magnitude of PMD
Vipul,
My experience with PMD is limited and I rarely work with it. Your
question on the magnitude would be best answered by some of the folks
who do PMD for a living.
A note on Johathon's comment. I don't believe that PMD should be
accounted for like DCD. The PMD will be convolved with the rest of the
link distortion and will simply (if anything about PMD is simple!) lead
to additional broadening. It will add into the ISI rather than decrease
the bit interval.
Gair
Vipul Bhatt wrote:
>
> Gair,
>
> And if there is no multiwavelength averaging, would you consider the
> pulse spreading values (7 ps and 17.5 ps) described in my earlier email a
> reasonable approximation?
>
> Thanks,
> Vipul
>
> ===============
>
> > -----Original Message-----
> > From: owner-stds-802-3-hssg-equal@xxxxxxxx
> > [mailto:owner-stds-802-3-hssg-equal@xxxxxxxx]On Behalf Of Gair Brown
> > Sent: Thursday, September 28, 2000 12:01 PM
> > To: vipul.bhatt@xxxxxxxxxxx
> > Cc: stds-802-3-hssg-equal@xxxxxxxx; HACKERTMJ@xxxxxxxxxxx;
> > SwansonSE@xxxxxxxxxxx; piers_dawe@xxxxxxxxxxx
> > Subject: Re: Estimating the magnitude of PMD
> >
> >
> >
> > Vipul,
> >
> > I'm not sure, but I believe you may still have an error in your
> > argument. The spectral width of typical long haul sources at 1550 is
> > extremely small. I don't believe the PMD response of this
> > small band of
> > wavelengths is really independent. So there will be no multiwavelength
> > averaging.
> >
> > Gair
> >
> >
> >
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