Hi, which kind of SPM you used? and which kind of calculation? We use a LT STM in UHV to observe the transport properties. Our system is too big to use the ab initio method, i am thinking about this problem.
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