I know that couple of networks cards exist - [PCI cards for PC - that allows direct fiber optics connectivity, but my question remains trying to replace a traditional media converter (Fiber Optics to RJ45). And also trying to do it in the lowest space possible.
Also if somebody knows how to do it in a Raspberry PI. It would be super useful as well.](Top 5 Ethernet cards to improve your FTTH network right to the PC)