1. National Institute of Technology, Sendai College; 48 Nodayama, Medeshima-Shiote Natori Miyagi 981-1239 Japan
2. Tohoku University; 6-6-05 Aza Aoba Aramaki Aoba-Ku Sendai-Shi Miyagi 980-8579 Japan
3. Global Optical Solutions, R&D Center; 2-50-9 Sanda-Cho, Hachi-Oji-Shi Tokyo 193-0832 Japan