A dark fiber path was recently ordered to a remote location on our
network, and to my surprise, the engineering report on the path is coming
back at around 130 km, which is substantially longer than I expected the
span to be.
While I am researching gear that will drive a signal this far
On Mar 5, 2010, at 2:36 PM, Justin M. Streiner wrote:
My gut tells me that the 2-point loss on the span at 1550nm will be somewhere
around 30-35 dB.
What's your measured chromatic dispersion? You might need
to budget in the hit from compensation too. Some of the
super long range optics
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On 3/5/2010 3:36 PM, Justin M. Streiner wrote:
A dark fiber path was recently ordered to a remote location on our
network, and to my surprise, the engineering report on the path is
coming back at around 130 km, which is substantially longer than I
It would be helpful to know what type of fiber you are working with...SMF-28(e)
G.652, NZDSF G.655, ...?
You not only need to account for dB loss over the span, but also chromatic
dispersion.
At 1550nm, you can expect = 0.22 dB/km for SMF-28 G.652 if you have a nice
clean fiber
That length you're probably going to need Raman amps. As others have
mentioned, if you're planning on 10G or higher you'll need to think about
Chromatic and Polarization dispersion. If the fiber is still in the process
of being laid it shouldn't be too bad assuming the fiber is of high quality.
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