Author Affiliations

K. Shibahara,⁽¹⁾ T. Mizuno,⁽¹⁾ H. Takara,⁽¹⁾ A. Sano,⁽¹⁾ H. Kawakami,⁽¹⁾ D. Lee,⁽¹⁾ Y. Miyamoto,⁽¹⁾ H. Ono,⁽²⁾ M. Oguma,⁽²⁾ Y. Abe,⁽³⁾ T. Kobayashi,⁽⁴⁾ T. Matsui,⁽⁴⁾ R. Fukumoto,⁽⁵⁾ Y. Amma,⁽⁵⁾ T. Hosokawa,⁽⁵⁾ S. Matsuo,⁽⁵⁾ K. Saito,⁽⁶⁾ H. Nasu,⁽⁷⁾ and T. Morioka⁽⁸⁾

⁽¹⁾NTT Network Innovation Laboratories, NTT Corporation, 1-1 Hikari-no-oka, Yokosuka, Kanagawa, 239-0847 Japan

⁽²⁾NTT Device Technology Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198 Japan

⁽³⁾NTT Device Innovation Center, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa, 243-0198 Japan

⁽⁴⁾NTT Access Network Service Systems Laboratories, NTT Corporation, Tsukuba, Ibaraki, 305-0805 Japan

⁽⁵⁾Optics and Electronics Laboratory, Fujikura Ltd., 1440, Mutsuzaki, Sakura, Chiba, 285-8550 Japan

⁽⁶⁾Hokkaido University, North 14 West 9, Sapporo, Hokkaido, 060-0814 Japan

⁽⁷⁾Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan

⁽⁸⁾Technical University of Denmark, DK2800 Kgs. Lyngby, Denmark