100G over 100 km of dark fiber
Tarko Tikan
tarko at lanparty.ee
Fri Oct 30 16:03:22 UTC 2020
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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