Hi Jared, 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.
Best regards, Vincentz PS: https://www.flexoptix.net/en/transceiver/q-161hg-80.html?co10728=100306 > Am 30.10.2020 um 15:19 schrieb Jared Brown <nanog-...@mail.com>: > > Hello NANOG! > > I need to push 100G over 100 km of dark fiber. Since there are no 100G > pluggable optics with this reach (~25 dB), I have been offered coherent > transport systems to solve my problem. This is all good and well, except > total system costs start from high five figures. > > So, my question is, do I have any other options? > > I can't help noticing that you can break out a 100G QSFP into four 25G QSFPs. > 25G DWDM systems are relatively inexpensive (low five figures), but can you > make 25G DWDM go 100 km? > > I only need the one 100G, so I don't really need a highly scalable DWDM > system. I can't put anything midspan, or if I could it would cost more than > just going with a coherent system. > > > Jared
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