1. Aalto University,Department of Information and Communications Engineering,Espoo,Finland
2. Institute of Communication and Computer Systems,Athens,Greece
3. Cumucore Espoo,Finland
4. Intracom Telecom,Peania, Athens,Greece
5. Fraunhofer Heinrich Hertz Institute,Berlin,Germany,10587
6. Optagon Photonics, Agia Paraskevi,Athens,Greece,15341