On Aug 13, 2018, at 5:56 PM, Eric Kuhnke <eric.kuhnke@gmail.com> wrote:
For 1 and 10Gbps OOK modulation yes, but not for something like a ITU DWDM grid channelized or tunable coherent optic. In which the (QPSK, 8PSK, 16QAM) signal has a specific THz width and frequency not unlike a radio operating in a very, very narrow waveguide.
There are some DCO 100G coherent optics on the market, but I think this thread is more about why there’s not much in the way of 40/100g transmission speed, but it really is about how 10G was one of the last walls where OOK was a thing. Once you went 40G/100G you went to parallel signals, either in CDWDM form or parallel signals on parallel fibers (eg: those MPT/MPO cables we all get to enjoy). If you talk to the optics folks you can get customized tx/rx optics, and in theory you could get an optimized 100G-LR4 or 100G-ER4-Lite optic, but even those the reach is quite limited to around 25Km while in the 10G space you can get up to 80-120km with a filter and a bunch of pluggable fixed channel (or tunable) optics. You can get decent 100G OEO solutions for a fair price per channel but you’re still looking at $$ compared to just building a 40x10G system due to the cost differences. Without more details like your link budget, etc.. it’s hard to suggest options other than get at least 2 fibers :-) I know some vendors are working on some creative 1 fiber solutions due to the way the dark fiber is taxed in Europe, so you should be talking to the usual suspects.. - Jared