100G over 100 km of dark fiber

Fri Oct 30 16:16:15 UTC 2020

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 at 6by7.net <mailto:ben at 6by7.net>
"The only fully end-to-end encrypted global telecommunications company in the world.”
FCC License KJ6FJJ

> On Oct 30, 2020, at 9:03 AM, Tarko Tikan <tarko at 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

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