As a matter of interest where in Hungary do you come from. I have visited and worked at the Biological Research Centre in Szeged several times form 1995. I have a collaboration with a group at the BRC.
The invertion of 10G optical transceiver has greatly increase the networking speed, for the science behind the transceiver, please check website and learn about CWDM SFP transceiver, www.fiberoptictransceiver.net
The XFP (10 Gigabit Small Form Factor Pluggable) is a standard for transceivers for high-speed computer network and telecommunication links that use optical fiber.please visit www.xfptransceiver.com for more info