1. University of Nottingham, University Park,George Green Institute for Electromagnetics Research, Faculty of Engineering,Nottingham,UK,NG7 2RD
2. 2 RELS Limited, ul. Warcianska 18,Wroclaw,Poland,54-128
3. Institute of Electronic Systems, Warsaw University of Technology, Nowowiejska 15/19,Faculty of Electronics and Information Technology,Warsaw,Poland,00-665
4. OptoChip Optoelectronics Ltd, B120, Qilu Soft Park,Jinan,China,250000