Re: 100G over 100 km of dark fiber

[Lady Benjamin PD Cannon <ben () 6by7 net>]

Very impressive!  Can you share your fiber type and link-loss?
—L.B.

Lady Benjamin PD Cannon, ASCE
6x7 Networks & 6x7 Telecom, LLC 
CEO 
ben () 6by7 net <mailto:ben () 6by7 net>
"The only fully end-to-end encrypted global telecommunications company in the world.”
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> On Oct 30, 2020, at 9:03 AM, Tarko Tikan <tarko () lanparty ee> wrote:
>
> hey,
>
> > If it’s just a single 100G channel needed you could try 100GBASE-ZR4. Specified for 80km, 30db power budget they 
> > could actually reach more the 80km.
> > Dispersion should also be „no" problem in the 1310nm length. I have to say that I never tried this on 100km distance 
> > without coherent solutions.
>
> Just to add to my original suggestion, we just did 100G-ZR4 over 30dB link with pre-FEC BER 3.174E-11.
>
> As OP is asking for a solution for 25dB I don't see any reason why ZR4 would not work and why you would need 
> coherent, amplifiers or any other additional solution except when you are limited by QSFP28 SFF power.
>
> -- 
> tarko