Author Affiliations

Hideo Kosaka,^#,* Takayuki Kawashima,^#,a) Akihisa Tomita,^# Masaya Notomi,^#,b) Toshiaki Tamamura,^#,b) Takashi Sato,^a),# and Shojiro Kawakami^a),#

^#Optoelectronics and High Frequency Device Research Laboratories, NEC, 34 Miyukigaoka, Tsukuba, Ibaraki, 305-8501, Japan

^a)Research institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Sendai, 980-77, Japan

^b)NTT Opto-electronics Laboratories, 3-1 Morinosato Wakamiya, Atsugi-shi, Kanagawa Pref., 243-01, Japan

^*Corresponding author: kosaka@obl.cl.nec.co.jp