Every available postdoc position you can found on this website
or center websites
You should sent email for address given on this websites.
Sorry NIMS is it quite big institute and I work in Biomaterials Center (polymer science, biology, medicine), so it is hard to me to give you any contact in your field of research.
Dear Prashant Kumar
I am a postdoc at NIMS (Tsukuba, Japan). If you want get postdoc position here you have to start application procedure, see details here
The most important are publications. It is as well good, before you start procedure, to found some Senior Researcher from interesting for you field of science. Try to look in structure of institute
I have done similar way few years ago.
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