DWDM on 250 Km dark fiber without re-amplification

[Jeremy <liste () freeheberg com>]

Hi all,

First, i'm sorry for my english, i'm french and i don't have a good 
level in this language. But i want some informations and i'm sure, 
someone will be give the good anwser about my question.

So, i'm regarding to rent a dual dark fiber in France, the estimated 
distance is 225 Km, but i know there are a lot of optical switching on 
the highway where it's fiber is installed (in theory, all 80 Km). So, i 
used the bad scenario, in adding 25 Km on my need.

I would like to buy a amplificator and multiplexer DWDM to add some 
10Gb/s waves on this dark fiber. I've see that the amplification is 
better on 100 Gb/s synchronised ports, but we don't have enoug capacity 
on our router to add 100 Gb/s interfaces.

So, someone has installed this type of hardware on a dark fiber without 
regeneration  on 250 Km of distance ?
If yes, with what kind of hardware ? If you are commercial for this 
hardware, please contact me in private message.

Thanks you for your time,
Jérémy
AS197922