クボタ　ヒロカズ   Hirokazu Kubota   久保田　寛和    所属   追手門学院大学  理工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	1993/04
形態種別	論文
査読	査読あり
標題	Ultrahigh speed optical soliton communication using erbium-doped fiber amplifiers
執筆形態	共著・編著（代表編著を除く）
掲載誌名	IEICE Transactions on Communications
掲載区分	国内
巻・号・頁	E76-B(4),pp.410-419
著者・共著者	Eiichi Yamada,Kazunori Suzuki,Hirokazu Kubota,Masataka Nakazawa
概要	Optical soliton transmissions at 10 and 20 Gbit/s over 1000 km with the use of erbium-doped fiber amplifiers are described in detail. For the 10 Gbit/s experiment, a bit error rate (BER) of below 1×10-13 was obtained with 220-1 pseudorandom patterns and the power penalty was less than 0.1 dB. In the 20 Gbit/s experiment optical multiplexing and demultiplexing techniques were used and a BER of below 1×10-12 was obtained with 223-1 pseudorandom patterns under a penalty-free condition. A new technique for sending soliton pulses over ultralong distances is presented which incorporates synchronous shaping and retiming using a high speed optical modulator. Some experimental results over 1 million km at 7.2 to approximately 10 Gbit/s are described. This technique enables us to overcome the Gordon-Haus limit, the accumulation of amplified spontaneous emission (ASE), and the effect of interaction forces between adjacent solitons. It is also shown by computer runs and a simple analysis that a one hundred million km soliton transmission is possible by means of soliton transmission controls in the time and frequency domains. This means that limit-free transmission is possible.
ISSN	0916-8516