Hi and welcome to LQ.
Fiberoptics is just a network using fibres that can transfer huge amounts of data with the speed of light. This has no influence on your personal computer. The fiberoptics is connected to a converter that uses ordinary copperbased ethernet, this kind of net usually has a limit @ 1Gbps, and maybe if you own an older pc it has a nic that can do 100 Mbps. So no matter what type of technology they use on the other side, it will be adaptable to your pc.
The short answer: Go ahead and connect you pc using Linux offcourse, the setup procedure is straightforward. Either you must use DHCP, or specify you settings like IP, DNS & Gateway.
Who is your ISP?
Good luck and have fun