᪩✄⏣ᏛᏛ㝔 ᇶᖿ⌮ᕤᏛ◊✲⛉
༤
༤㻌 ኈ㻌 ㄽ㻌 ᩥ㻌 ᴫ㻌 せ
ㄽ ᩥ 㢟 ┠
Study on Dispersion-Managed High-Speed WDM Transmission Technologies
in Optical Submarine Cable Systems
ගᾏᗏࢣ࣮ࣈࣝࢩࢫࢸ࣒࠾ࡅࡿ
ศᩓ࣐ࢿ࣮ࢪ࣓ࣥࢺ㧗㏿ WDM ఏ㏦ᢏ⾡
㛵ࡍࡿ◊✲
⏦ ㄳ ⪅
Keiji TANAKA ⏣୰ ၨோ
2013 ᖺ 5 ᭶
ᮏ ㄽ ᩥ ࡣ ࠊ ග ᾏ ᗏ ࢣ ࣮ ࣈ ࣝ ࢩ ࢫ ࢸ ࣒ ࡢ 㧗 ㏿ ࣭ ᐜ 㔞 ࢆ ᐇ ⌧ ࡍ ࡿ ࡓ ࡵ ࡢ ග ఏ ㏦ ᢏ ⾡ 㛵 ࡍ ࡿ ◊ ✲ ᡂ ᯝ ࢆ ヲ ㏙ ࡋ ࡓ ᢏ ⾡ ㄽ ᩥ ࡛ ࠶ ࡿ ࠋ ග ቑ ᖜ ୰ ⥅ ࢩ ࢫ ࢸ ࣒ ࠾ ࡼ ࡧ ↓
୰ ⥅ ࢩ ࢫ ࢸ ࣒ ࠾ ࠸ ࡚ ࠊ ఏ ㏦ ᐜ 㔞 ࡢ ᣑ ࠾ ࡼ ࡧ ㊥ 㞳 ࡢ ᘏ ఙ ㈨ ࡍ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ
࣓ ࣥ ࢺ ᪉ ᘧ ࢆ ᪂ ࡓ ᥦ ࡍ ࡿ ඹ ࠊ ᙜ ヱ ᪉ ᘧ ࡢ ᭷ ຠ ᛶ ࢆ ᩘ ್ ࢩ ࣑ ࣗ ࣞ ࣮ ࢩ ࣙ ࣥ
࡞ ࡽ ࡧ ఏ ㏦ ᐇ 㦂 ࡼ ࡾ ᐇ ド ࡋ ࡓ ࠋ
ග ಙ ྕ ࢆ ග ┤ ᥋ ቑ ᖜ ࡍ ࡿ ࢚ ࣝ ࣅ ࢘ ࣒ ῧ ຍ ග ࣇ ࣂ ቑ ᖜ ჾ 㸦e r b i u m - d o p e d o p t i c a l f i b e r a m p l i f i e r㸸E D FA㸧 Ἴ 㛗 ከ 㔜㸦w a v e l e n g t h d i v i s i o n m u l t i p l e x i n g :
W D M㸧ᢏ ⾡ ࢆ ⤌ ࡳ ྜ ࢃ ࡍ ࡇ ࡛ ࠊග ࣇ ࣂ ᙜ ࡓ ࡾ ࡢ ࢣ ࣮ ࣈ ࣝ ఏ ㏦ ᐜ 㔞 ࡀ 㣕 ㌍
ⓗ ᣑ ࡋ ࠊ2 0 0 0 ᖺ ࡣ ࠊ 㸯 Ἴ 㛗 ᙜ ࡓ ࡾ 1 0 G b i t / s ಙ ྕ ࢆ 1 6 W D M ࡋ ࡓ ఏ ㏦
ᐜ 㔞 1 6 0 G b i t / s ࡢ ὒ ᶓ ᩿ ࢣ ࣮ ࣈ ࣝ ࡀ ၟ ⏝ ࡉ ࢀ ࡚ ࠸ ࡿ ࠋ ࡋ ࡋ ࡞ ࡀ ࡽ ࠊ ග ቑ
ᖜ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡛ ࡣ ࠊ ಙ ྕ ࢆ ⏕ ࡋ ࡞ ࠸ ࡓ ࡵ ࠊ ග ࣇ ࣂ ఏ ㏦ ୰ ⏕ ࡌ ࡿ ಙ
ྕ ṍ ࡳ ࡸ ග ቑ ᖜ ჾ ࡽ ࡢ 㞧 㡢 ࡞ ࡀ ㊥ 㞳 ᛂ ࡌ ࡚ ⣼ ✚ ࡉ ࢀ ࡿ ࠋ ග ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡢ
◊ ✲ 㛤 Ⓨ ࡣ ࠊఏ ㏦ ࢆ ไ 㝈 ࡍ ࡿ ࡇ ࡢ ࡼ ࠺ ࡞ ၥ 㢟 ࢆ ᢚ ไ ࡶ ࡋ ࡃ ࡣ ゎ Ỵ ࡍ ࡿ ࡇ ࠶ ࡿ ࠋ
≉ ࠊ1 Ἴ 㛗 ᙜ ࡓ ࡾ 1 0 G b i t / s ௨ ୖ ࡢ 㧗 ㏿ W D M ఏ ㏦ ࡛ ࡣ ࠊග ࣇ ࣂ ࡢ ศ ᩓ 㠀
⥺ ᙧ ຠ ᯝ ㉳ ᅉ ࡍ ࡿ ఏ ㏦ ຎ ࢆ ᢚ ไ ࡍ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ࡀ 㔜 せ ࡞ ࡿ ࠋ
ᮏ ㄽ ᩥ ࡛ ࡣ ࠊ1 Ἴ 㛗 ᙜ ࡓ ࡾ 1 0 G b i t / s ௨ ୖ ࡢ 㧗 ㏿ W D M ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᪉ ᘧ ࢆ ᪂ ࡓ ᥦ ࡋ ࡚ ࠸ ࡿ ࠋ ᪂ つ ᥦ ᪉ ᘧ ࢆ 㐺 ⏝ ࡍ ࡿ ࡇ ࡛ ࠊ ග ቑ ᖜ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡛ ࡣ 1 0 G b i t / s ࣋ ࣮ ࢫ W D M ࡛ ࡢ 3 2 0 G b i t / s ὒ ᶓ ᩿ ఏ
㏦ ࢆ ࠊ ↓ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡛ ࡣ 4 0 G b i t / s ࣋ ࣮ ࢫ W D M ࡛ ࡢ 3 0 0 k m ㉸ ࡢ ࢸ ࣛ ࣅ
ࢵ ࢺ ఏ ㏦ ࢆ ୡ ⏺ ࡛ ึ ࡵ ࡚ ᐇ ド ࡋ ࡓ ࠋࡲ ࡓ ࠊග ቑ ᖜ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࠸ ࡚ ࠊW D M ಙ ྕ ࢆ 㧗 ᐦ ᗘ ࡍ ࡿ ࡇ ࡛ ᐜ 㔞 ᣑ ࢆ ᅗ ࡿ ಙ ྕ ࢫ ࣌ ࢡ ࢺ ࣝ ࡢ ࣉ ࣜ ࣇ ࣝ ࢱ ࣜ ࣥ ࢢ ᢏ ⾡ ╔ ┠ ࡋ ࠊ ࢩ ࢫ ࢸ ࣒ ≉ ᛶ ᛂ ࡌ ࡓ ࣇ ࣝ ࢱ ࣜ ࣥ ࢢ ᮲ ௳ ࢆ ᭱ 㐺 ࡋ ࡚ ࠊ ࿘ Ἴ ᩘ
⏝ ຠ ⋡ 0 . 8 b i t / s / H z ࡢ 4 0 G b i t / s ࣋ ࣮ ࢫ 㧗 ᐦ ᗘ W D M ࡛ ࡢ ኴ ᖹ ὒ ᶓ ᩿ ఏ ㏦ ࡀ ᐇ
⌧ ྍ ⬟ ࡛ ࠶ ࡿ ࡇ ࢆ ♧ ࡋ ࡓ ࠋ ࡉ ࡽ ࠊ ᛴ ቑ ࡍ ࡿ ࢺ ࣛ ࣇ ࢵ ࢡ 㟂 せ ㎿ ㏿ ࡘ ప ࢥ ࢫ ࢺ ࡛ ᑐ ᛂ ࡍ ࡿ ࡓ ࡵ ࡢ ࢵ ࣉ ࢢ ࣞ ࣮ ࢻ ᢏ ⾡ ࡋ ࡚ ࠊ ᪤ タ ᅜ ෆ ග ᾏ ᗏ ࢣ ࣮ ࣈ ࣝ ࢩ ࢫ ࢸ ࣒ ࡛ ࠶ ࡿ J I H㸦J a p a n I n f o r m a t i o n H i g h w a y㸧 ࡢ ఏ ㏦ ᐜ 㔞 ࢆ 1 6 ಸ ࡢ 1 T b i t / s
ࡍ ࡿ ࡓ ࡵ ࡢ ➃ ᒁ ᢏ ⾡ ࢆ ᫂ ࡽ ࡋ ࠊJ I H ࡚ ࢸ ࣛ ࣅ ࢵ ࢺ ఏ ㏦ ࡀ ᐇ ⌧ ྍ ⬟ ࡛ ࠶ ࡿ ࡇ ࢆ ᐇ ド ࡋ ࡓ ࠋ
➨ 1 ❶ ࠕ ᗎ ㄽ ࠖ ࡛ ࡣ ࠊ ኴ ᖹ ὒ ᶓ ᩿ ග ᾏ ᗏ ࢣ ࣮ ࣈ ࣝ ࢩ ࢫ ࢸ ࣒ ࡢ ఏ ㏦ ᐜ 㔞 ᣑ ࡢ ኚ 㑄 ྛ ࢩ ࢫ ࢸ ࣒ 㐺 ⏝ ࡉ ࢀ ࡓ ࣈ ࣞ ࣮ ࢡ ࢫ ࣝ ࣮ ᢏ ⾡ ࡘ ࠸ ࡚ ᴫ ㄝ ࡍ ࡿ ඹ ࠊP C - 1 㸦P a c i f i c C r o s s i n g 1㸧࠾ ࡼ ࡧ J a p a n - U S ࢣ ࣮ ࣈ ࣝ ࡛ ᐇ ⌧ ࡉ ࢀ ࡓ 1 6 0 G b i t / s ࢩ ࢫ ࢸ ࣒ ௨ 㝆 ࡢ ࡉ ࡽ ࡞ ࡿ ᐜ 㔞 ᣑ ྥ ࡅ ࡓ ᢏ ⾡ ㄢ 㢟 ࡘ ࠸ ࡚ ヲ ㏙ ࡋ ࡓ ࠋ ༢ ୍ ࢳ ࣕ ࢿ ࣝ ఏ ㏦ ࡛ ࡢ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ࡛ ࡣ ࠊ 㠀 ⥺ ᙧ ຠ ᯝ ࡛ ࠶ ࡿ ⮬ ᕫ ┦ ኚ ㄪ 㸦s e l f - p h a s e
m o d u l a t i o n㸸S P M㸧 ࠊ ග ࣇ ࣂ ࢫ ࣃ ࣥ ࡢ ศ ᩓ ್ ࡛ ࠶ ࡿ ࣟ ࣮ ࢝ ࣝ ศ ᩓ ್ ఏ ㏦
㊰ ୰ ࡛ ࡢ ศ ᩓ ⿵ ൾ ᚋ ࡢ ࢩ ࢫ ࢸ ࣒ ศ ᩓ ࡀ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᑐ ㇟ ࡞ ࡿ ࡀ ࠊW D M ఏ ㏦
࡛ ࡣ ࠊ ࡉ ࡽ ಙ ྕ ᖏ ᇦ య ࢃ ࡓ ࡗ ࡚ ࡢ Ἴ 㛗 ศ ᩓ ┦ ┦ ኚ ㄪ 㸦c r o s s - p h a s e
m o d u l a t i o n㸧 ࡞ ࡢ 㠀 ⥺ ᙧ ࢡ ࣟ ࢫ ࢺ ࣮ ࢡ ຠ ᯝ ࡶ ⪃ ៖ ࡍ ࡿ ᚲ せ ࡀ ࠶ ࡿ ࠋ ࡇ ࡢ ࡼ ࠺ ࡞
≧ ἣ ୗ ࡛ ࡣ ࠊ ၟ ⏝ ᑟ ධ ᚲ せ ࡞ ఏ ㏦ ရ ㉁ ࢆ ☜ ಖ ࡍ ࡿ ࡓ ࡵ ࠊ ࢩ ࢫ ࢸ ࣒ ࢆ ࡢ ࡼ ࠺
タ ィ ࡍ ࡿ ࡀ 㔜 せ ࡞ ᢏ ⾡ ㄢ 㢟 ࡞ ࡿ ࠋ ࡉ ࡽ ࠊ ↓ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡛ ࡣ ࠊ ග ࣇ
ࣂ ఏ ㏦ ㊰ ࡢ ග ಙ ྕ ධ ຊ ࣃ ࣡ ࣮ ࠾ ࡼ ࡧ ࣛ ࣐ ࣥ ቑ ᖜ ࣭ 㐲 㝸 E D F ບ ㉳ ࡢ ࡓ ࡵ ࡢ
࣏ ࣥ ࣉ ග ධ ຊ ࣃ ࣡ ࣮ ࢆ ࡇ ࡲ ࡛ ࡁ ࡃ ࡛ ࡁ ࡿ ࡀ 㛗 ᘏ ྥ ࡅ ࡓ ㄢ 㢟 ࡞ ࡿ ࠋ ୖ
㏙ ࡢ ග ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ຍ ࠼ ࠊ᭷ 㝈 ࡞ E D FA ᖏ ᇦ ࡢ ᭷
ຠ ⏝ ㈨ ࡍ ࡿ W D M ಙ ྕ ࡢ 㧗 ᐦ ᗘ ᢏ ⾡ ࡸ ࠊ ᪤ Ꮡ ࡢ ࣜ ࢯ ࣮ ࢫ ࢆ ᭷ ຠ ⏝ ࡋ ࡚ ㎿
㏿ ࡘ ప ࢥ ࢫ ࢺ ࡚ ࢺ ࣛ ࣇ ࢵ ࢡ 㟂 せ ᑐ ᛂ ࡍ ࡿ ࢩ ࢫ ࢸ ࣒ ࢵ ࣉ ࢢ ࣞ ࣮ ࢻ ᢏ ⾡ ࡶ ㄢ 㢟 ࡞ ࡿ ࠋ ࡞ ࠾ ࠊ ᮏ ❶ ࡢ ᭱ ᚋ ࠊ ᮏ ㄽ ศ ࡢ ᵓ ᡂ ➨ 2 ❶ ௨ 㝆 グ ㍕ ࡍ ࡿ ◊ ✲ ෆ ᐜ ࡘ ࠸ ࡚ ㄝ ᫂ ࡋ ࡓ ࠋ
➨ 2 ❶ ࠕ ග ㏻ ಙ ࢩ ࢫ ࢸ ࣒ タ ィ ࠖ ࡛ ࡣ ࠊ ග ㏻ ಙ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ ࢩ ࢫ ࢸ ࣒ タ ィ ࡢ ᣦ 㔪 ᡭ ἲ ࡘ ࠸ ࡚ ㏙ ࡓ ࠋ ග ࣇ ࣂ ୰ ࡢ ࣃ ࣝ ࢫ ࡢ ⯙ ࠸ ࢆ グ ㏙ ࡍ ࡿ 㠀 ⥺ ᙧ ࢩ
ࣗ ࣞ ࢹ ࣥ ࢞ ࣮ ᪉ ⛬ ᘧ ࡽ ఏ ㏦ ࣌ ࢼ ࣝ ࢸ ࣇ ࣜ ࣮ ࡞ ࡿ ఏ ㏦ ᦆ ኻ ⿵ ൾ ศ ᩓ ࣐ ࢿ
࣮ ࢪ ࣓ ࣥ ࢺ ࡢ ᮲ ௳ ᘧ ࢆ ᑟ ฟ ࡋ ࠊࢩ ࢫ ࢸ ࣒ タ ィ ࡢ ᣦ 㔪 ࢆ ⌮ ㄽ ⓗ ᫂ ☜ ࡋ ࡓ ࠋࡲ ࡓ ࠊ ࢩ ࢫ ࢸ ࣒ タ ィ ᡭ ἲ ࡋ ࡚ ࠊ ග ࣇ ࣂ ࢫ ࣃ ࣥ ࡛ ࡢ ⣼ ✚ 㠀 ⥺ ᙧ 㔞 ╔ ┠ ࡋ ࡓ ⌮ ㄽ ゎ ᯒ ࠊ ᩘ ್ ࢩ ࣑ ࣗ ࣞ ࣮ ࢩ ࣙ ࣥ ࠊ ࡞ ࡽ ࡧ ࿘ ᅇ ࣝ ࣮ ࣉ ఏ ㏦ ᐇ 㦂 ࡘ ࠸ ࡚ ㄝ ᫂ ࡋ ࡓ ࠋ
➨ 3 ❶ ࠕ 㛗 ㊥ 㞳 W D M ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᢏ ⾡ ࠖ ࡛ ࡣ ࠊ
ὒ ᶓ ᩿ ග ቑ ᖜ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᢏ ⾡ ࡘ ࠸ ࡚ ㏙
ࡓ ࠋ 1 6 0 G b i t / s ࢡ ࣛ ࢫ ࡢ ὒ ᶓ ᩿ ࢩ ࢫ ࢸ ࣒ 㐺 ⏝ ࡉ ࢀ ࡚ ࠸ ࡿ D S F
㸦d i s p e r s i o n - s h i f t e d f i b e r㸧 ఏ ㏦ ㊰ ࡛ ࡣ ࠊ ศ ᩓ ್ ศ ᩓ ್ ࡢ Ἴ 㛗 ౫ Ꮡ ᛶ 㸦 ศ ᩓ ࢫ
ࣟ ࣮ ࣉ 㸧 ࡢ ୧ ᪉ ࢆ ⿵ ൾ ࡛ ࡁ ࡞ ࠸ ࡓ ࡵ ࠊ ఏ ㏦ ㊰ ࡛ ࡢ ⣼ ✚ Ἴ 㛗 ศ ᩓ ࡢ ᙳ 㡪 ࡼ ࡾ Ἴ 㛗 ከ 㔜 ᩘ ࡢ ᣑ ᙇ ࡀ ไ 㝈 ࡉ ࢀ ࡿ ࠋ ࡑ ࡇ ࡛ ࠊ ᮏ ၥ 㢟 ࢆ ゎ Ỵ ࡍ ࡿ ᪉ ἲ ࡋ ࡚ ࠊ S M F 㸦s t a n d a r d s i n g l e - m o d e f i b e r㸧 ࢫ ࣟ ࣮ ࣉ ⿵ ൾ ᆺ D C F㸦s l o p e - c o m p e n s a t i o n d i s p e r s i o n c o m p e n s a t i o n f i b e r㸸S C - D C F㸧 ࢆ ⤌ ࡳ ྜ ࢃ ࡏ ࡚ ࢫ ࣃ ࣥ ẖ ศ ᩓ ศ ᩓ ࢫ ࣟ ࣮ ࣉ ࢆ ⿵ ൾ ࡍ ࡿ ᪉ ἲ ࢆ ᥦ ࡋ ࠊ ᙜ ヱ ࢫ ࣃ ࣥ ᵓ ᡂ ࡚ 3 2 x 1 0 . 7 G b i t / s –
7 , 2 8 0 k m ࡢ ὒ ᶓ ᩿ ྍ ⬟ ࡞ 㛗 ㊥ 㞳 W D M ఏ ㏦ ࢆ ୡ ⏺ ࡛ ึ ࡵ ࡚ ᐇ ド ࡋ ࡓ ࠋࡲ ࡓ ࠊᮏ
㉁ ⓗ 㞽 ศ ᩓ ࢫ ࣟ ࣮ ࣉ ≉ ᛶ ࢆ ᭷ ࡍ ࡿ ศ ᩓ ࣇ ࣛ ࢵ ࢺ ࣇ ࣂ ࢆ ⏝ ࠸ ࡿ ᪉ ἲ ࡶ ᥦ ࡋ ࠊ ศ ᩓ ࣇ ࣛ ࢵ ࢺ ࣇ ࣂ ࡢ ࣏ ࢸ ࣥ ࢩ ࣕ ࣝ ᚋ ྥ ࡅ ࡓ ㄢ 㢟 ࢆ ᫂ ࡽ ࡋ ࡓ ࠋ
➨ 4 ❶ ࠕ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ఏ ㏦ ㊰ ࣛ ࣐ ࣥ ቑ ᖜ ࢆ ⏝ ࠸ ࡓ 4 0 G b i t / s ࣋ ࣮ ࢫ
W D M ↓ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠖ ࡛ ࡣ ࠊ 㐲 㝸 ບ ㉳ E D F ቑ ᖜ ࣛ ࣐ ࣥ ቑ ᖜ ࢆ ే ⏝ ࡋ ࡓ ↓
୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᢏ ⾡ ࡘ ࠸ ࡚ ㏙ ࡓ ࠋ ↓ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡛ ࡢ ㊥ 㞳 ᘏ ఙ ࡢ ࡓ ࡵ ࡣ ࠊS N R㸦s i g n a l - t o - n o i s e r a t i o㸧 ࢆ 㧗 ࡃ ಖ ᣢ ࡍ
ࡿ ࡇ ࡀ 㔜 せ ࡞ ࡿ ࡓ ࡵ ࠊ ග ࣇ ࣂ ࡢ ධ ຊ ಙ ྕ ࡢ 㧗 ฟ ຊ ࠊ ග ቑ ᖜ ࡢ 㧗 ࢤ
ࣥ ࠊ ࠾ ࡼ ࡧ ఏ ㏦ ㊰ ࡛ ࡢ ⣼ ✚ ศ ᩓ ್ ࡢ ᢚ ไ ࢆ ┠ ⓗ ࡋ ࡓ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᪉ ᘧ
ࢆ ᥦ ࡋ ࡓ ࠋ ࡇ ࢀ ࡲ ࡛ ࡣ 4 0 G b i t / s ࣋ ࣮ ࢫ W D M ࡛ ࡢ ఏ ㏦ ྍ ⬟ ㊥ 㞳 ࡀ 2 5 0 k m ไ 㝈 ࡉ ࢀ ࡚ ࠸ ࡓ ࡢ ᑐ ࡋ ࡚ ࠊ ᮏ ᪉ ᘧ ࢆ 㐺 ⏝ ࡍ ࡿ ࡇ ࡛ ࠊ ఏ ㏦ ྍ ⬟ ㊥ 㞳 ࢆ ୡ ⏺ ࡛ ึ
ࡵ ࡚ 3 0 0 k m ㉸ ᘏ ఙ ࡋ ࡓ 2 5 x 4 0 G b i t / s – 3 0 6 k m ࡢ ↓ ୰ ⥅ ఏ ㏦ ࢆ ᐇ ド ࡋ ࡓ ࠋ
➨ 5 ❶ࠕ ಙ ྕ ࢫ ࣌ ࢡ ࢺ ࣝ ⊃ ✽ ࡼ ࡿ 4 0 G b i t / s ࣋ ࣮ ࢫ 㧗 ᐦ ᗘ D W D M ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠖ ࡛ ࡣ ࠊW D M 㧗 ᐦ ᗘ ᢏ ⾡ ࡘ ࠸ ࡚ ㏙ ࡓ ࠋ ග ቑ ᖜ ᖏ ᇦ ࡀ ᭷ 㝈 ࡛ ࠶ ࡿ ග ቑ ᖜ ୰ ⥅ W D M ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࡛ ࡢ ࡉ ࡽ ࡞ ࡿ ᐜ 㔞 ࡢ ࡓ ࡵ ࡣ ࠊ ఏ ㏦ ㊰ ࡢ ศ ᩓ ࣐ ࢿ
࣮ ࢪ ࣓ ࣥ ࢺ ᢏ ⾡ ຍ ࠼ ࡚ ࠊ ࿘ Ἴ ᩘ ⏝ ຠ ⋡ ࡢ ྥ ୖ ࡀ 㔜 せ ࡞ ࡿ ࠋ ࡑ ࡇ ࡛ ࠊ ࿘ Ἴ ᩘ
⏝ ຠ ⋡ ࡢ ྥ ୖ ࡀ ᮇ ᚅ ࡛ ࡁ ࡿ 4 0 G b i t / s 㧗 ㏿ ಙ ྕ ࢆ ⏝ ࠸ ࡚ ࠊ 㧗 ᐦ ᗘ W D M ఏ ㏦ ࢆ ᐇ ⌧ ࡍ ࡿ ࢳ ࣕ ࢿ ࣝ 㛫 㝸 ⊃ ✽ ᢏ ⾡ ࢆ ᥦ ࡋ ࡓ ࠋ ࢳ ࣕ ࢿ ࣝ 㛫 㝸 ࢆ ⊃ ࡵ ࡓ 㝿 ࡢ ࢳ ࣕ ࢿ
ࣝ 㛫 㠀 ⥺ ᙧ ࢡ ࣟ ࢫ ࢺ ࣮ ࢡ ࡢ ᙳ 㡪 ࠊ ࣇ ࣝ ࢱ ࣜ ࣥ ࢢ ࡼ ࡿ ಙ ྕ ࢫ ࣌ ࢡ ࢺ ࣝ ⊃ ✽ ࡀ ఏ ㏦ ≉ ᛶ ࠼ ࡿ ᙳ 㡪 ࢆ ࠊ ᩘ ್ ࢩ ࣑ ࣗ ࣞ ࣮ ࢩ ࣙ ࣥ ࡞ ࡽ ࡧ ఏ ㏦ ᐇ 㦂 ࡼ ࡾ ᐃ 㔞
ⓗ ᳨ ウ ࡋ ࠊ ࿘ Ἴ ᩘ ⏝ ຠ ⋡ 0 . 8 b i t / s / H z ࡢ 4 0 G b i t / s ࣋ ࣮ ࢫ ఏ ㏦ ࡚ ᭱ 㛗 ࡞
ࡿ 2 5 x 4 0 G b i t / s㸫4 8 0 k m ࡢ 㧗 ᐦ ᗘ W D M ఏ ㏦ ࢆ ᐇ ド ࡋ ࡓ ࠋ ࡲ ࡓ ࠊ ᙜ ヱ 㧗 ᐦ ᗘ
W D M ఏ ㏦ ࡚ ᭷ ຠ ࡞ ࡿ ࣉ ࣜ ࣇ ࣝ ࢱ ࣜ ࣥ ࢢ ࡢ ࢩ ࢫ ࢸ ࣒ ≉ ᛶ ẖ ࡢ ᭱ 㐺 ᮲ ௳ ࢆ ᫂
ࡽ ࡋ ࠊ4 0 G b i t / s ࣋ ࣮ ࢫ W D M ࡛ ࡢ ኴ ᖹ ὒ ᶓ ᩿ ఏ ㏦ ࡀ ྍ ⬟ ࡛ ࠶ ࡿ ࡇ ࢆ ♧ ࡋ ࡓ ࠋ
➨ 6 ❶ ࠕ4 0 G b i t / s ࣋ ࣮ ࢫ W D M ఏ ㏦ ᢏ ⾡ ࡼ ࡿ J I H ࢣ ࣮ ࣈ ࣝ ࢩ ࢫ ࢸ ࣒ ࡢ ࢵ
ࣉ ࢢ ࣞ ࣮ ࢻ ࠖ ࡛ ࡣ ࠊ ᪤ タ ᅜ ෆ ග ᾏ ᗏ ࢣ ࣮ ࣈ ࣝ ࢩ ࢫ ࢸ ࣒ ࡛ ࠶ ࡿ J I H ࡢ ࢵ ࣉ ࢢ ࣞ ࣮ ࢻ ᢏ ⾡ ࡘ ࠸ ࡚ ㏙ ࡓ ࠋ ග ᾏ ᗏ ࢣ ࣮ ࣈ ࣝ ࢩ ࢫ ࢸ ࣒ ࡛ ࡣ ࠊ ఏ ㏦ ㊰ ഃ ࡛ ࡢ ࣐ ࢿ ࣮ ࢪ ࣓
ࣥ ࢺ ᑐ ᛂ ࡀ ᐇ ㉁ ⓗ ྍ ⬟ ࡛ ࠶ ࡿ ࡓ ࡵ ࠊ ග ㏦ ཷ ಙ ➃ ᒁ ഃ ࡛ ࡢ ࢵ ࣉ ࢢ ࣞ ࣮ ࢻ ᢏ ⾡ ࡀ 㔜 せ ࡞ ࡿ ࠋ ࡑ ࡇ ࡛ ࠊ ➃ ᒁ ᢏ ⾡ ࡋ ࡚ ࠊ ಙ ྕ ࣇ ࢛ ࣮ ࣐ ࢵ ࢺ ㄗ ࡾ ゞ ṇ ➢ ྕ 㸦f o r w a r d e r r o r c o r r e c t i o n㸸F E C㸧 ╔ ┠ ࡋ ࠊJ I H ࢩ ࢫ ࢸ ࣒ ࡢ 1 6 ಸ ௨ ୖ ࡢ ᐜ 㔞 ᣑ ┦ ᙜ ࡍ ࡿ 5 0 G b i t / s ࡽ 1 T b i t / s ࡢ ࢵ ࣉ ࢢ ࣞ ࣮ ࢻ ࢆ ᐇ ⌧ ࡍ ࡿ ᪉ ᘧ ࢆ ᥦ ࡋ ࡓ ࠋ ࡑ ࡢ ⤖ ᯝ ࠊ ಙ ྕ ࣇ ࢛ ࣮ ࣐ ࢵ ࢺ ࡢ ᭱ 㐺 F E C ᢏ ⾡ ࡢ 㐺 ⏝ ࡼ ࡾ ࠊ2 . 5 G b i t / s ࣋ ࣮ ࢫ ࡽ 4 0 G b i t / s ࣋ ࣮ ࢫ ࡢ W D M ఏ ㏦ 㸦1 T b i t / s ఏ ㏦ 㸧 ࡢ ࢵ ࣉ ࢢ
ࣞ ࣮ ࢻ ࡀ ᐇ ⌧ ྍ ⬟ ࡛ ࠶ ࡿ ࡇ ࢆ ♧ ࡋ ࡓ ࠋ
᭱ ⤊ ❶ ࡞ ࡿ ➨ 7 ❶ ࡛ ࡣ ࠊග ቑ ᖜ ୰ ⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ S M F㸭S C - D C F ࢫ
ࣃ ࣥ ࢆ ⏝ ࠸ ࡓ ఏ ㏦ ㊰ ࡢ ศ ᩓ ࣇ ࣛ ࢵ ࢺ ࢆ ᐇ ⌧ ࡍ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᢏ ⾡ ࠊ ↓ ୰
⥅ ఏ ㏦ ࢩ ࢫ ࢸ ࣒ ࠾ ࡅ ࡿ 㐲 㝸 ບ ㉳ E D F㸭 ࣛ ࣐ ࣥ ቑ ᖜ ࢆ ే ⏝ ࡋ ࡓ 㧗 S N R ࢆ ᐇ ⌧ ࡍ ࡿ ศ ᩓ ࣐ ࢿ ࣮ ࢪ ࣓ ࣥ ࢺ ᢏ ⾡ ࠊ ᐜ 㔞 ᚲ 㡲 ࡞ ࡿ 㧗 ᐦ ᗘ W D M ఏ ㏦ ᢏ ⾡ ࠊ ࠾
ࡼ ࡧ ᪤ Ꮡ ࢩ ࢫ ࢸ ࣒ ࡢ ࢵ ࣉ ࢢ ࣞ ࣮ ࢻ ᢏ ⾡ ࡢ ᭷ ຠ ᛶ ࢆ ⥲ ᣓ ࡋ ࠊ ග ఏ ㏦ ࢩ ࢫ ࢸ ࣒ 㛤 Ⓨ
࠾ ࡅ ࡿ ᮏ ◊ ✲ ᡂ ᯝ ࡢ ព ⩏ ࢆ ♧ ࡋ ࡓ ࠋ
㹌㹭
᪩
᪩✄⏣Ꮫ ༤ኈ㸦ᕤᏛ㸧 Ꮫ⏦ㄳ ◊✲ᴗ⦼᭩
Ặྡ ⏣୰ ၨோ ༳
㸦㸰㸮㸯㸱ᖺ 㸳᭶ ⌧ᅾ㸧
✀㢮ู 㢟ྡࠊ Ⓨ⾲࣭Ⓨ⾜ᥖ㍕ㄅྡࠊ Ⓨ⾲࣭Ⓨ⾜ᖺ᭶ࠊ 㐃ྡ⪅㸦⏦ㄳ⪅ྵࡴ㸧
ㄽᩥ
ㄽᩥ
ࣞࢱ࣮
ࣞࢱ࣮
ࣞࢱ࣮
ࣞࢱ࣮
ࣞࢱ࣮
㢟ྡ 㸸Study on Capacity Upgrade of JIH (Japan Information Highway) Submarine Cable System Using 40 Gbit/s-Based WDM Transmission Technologies
ᥖ㍕ㄅྡ㸸IEICE Transactions on Communications, Vol. E87-B No. 6, pp.1463-1469
Ⓨ⾜ᖺ᭶㸸2004ᖺ6᭶
㐃ྡ⪅ 㸸K. Tanaka, I. Morita, N. Yoshikane, and N. Edagawa
㢟ྡ 㸸40 Gbit/s x 25 WDM 306 km Unrepeatered Transmission using 175Pm2-Aeff Fibre ᥖ㍕ㄅྡ㸸IEEProceedings Optoelectronics, Vol.150 Issue 3, pp.224-228
Ⓨ⾜ᖺ᭶㸸2003ᖺ6᭶
㐃ྡ⪅ 㸸K. Tanaka, H. Sakata, T. Miyakawa, I. Morita, K. Imai, and N. Edagawa
㢟ྡ 㸸40 Gbit/s x 25 WDM 306 km Unrepeatered Transmission using 175Pm2-Aeff Fibre ᥖ㍕ㄅྡ㸸IEE Electronics Letters, Vol. 37 Issue 21, pp.1354-1356
Ⓨ⾜ᖺ᭶㸸2001ᖺ10᭶
㐃ྡ⪅ 㸸K. Tanaka, H. Sakata, T. Miyakawa, I. Morita, K. Imai, and N. Edagawa
㢟ྡ 㸸50 GHz-Spaced 40 Gbit/s x 25 WDM Transmission over 480 km Using Bandlimited RZ Signals
ᥖ㍕ㄅྡ㸸IEE Electronics Letters, Vol.37 Issue 12, pp.775-777
Ⓨ⾜ᖺ᭶㸸2001ᖺ6᭶
㐃ྡ⪅ 㸸K. Tanaka, I. Morita, and N. Edagawa
㢟ྡ 㸸Impact of Nonlinear Crosstalk in 0.8 nm-Spacing 40 Gbit/s DWDM Systems ᥖ㍕ㄅྡ㸸IEE Electronics Letters, Vol. 36 Issue 14, pp.1217-1218
Ⓨ⾜ᖺ᭶㸸2000ᖺ7᭶
㐃ྡ⪅ 㸸K. Tanaka, I. Morita, N. Edagawa, and M. Suzuki
㢟ྡ 㸸320 Gbit/s (32 x 10.7 Gbit/s) Error-Free Transmission over 7,280 km Using Dispersion Flattened Fibre Link with Standard SMF and Slope Compensating DCF
ᥖ㍕ㄅྡ㸸IEE Electronics Letters, Vol. 35 Issue 21, pp.1860-1862
Ⓨ⾜ᖺ᭶㸸1999ᖺ10᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, N. Edagawa, and M. Suzuki
㢟ྡ 㸸400 Gbit/s (20 x 20 Gbit/s) Dense WDM Soliton-Based RZ Signal Transmission Using Dispersion Flattened Fibre
ᥖ㍕ㄅྡ㸸IEE Electronics Letters, Vol. 34 Issue 23, pp.2257-2258
Ⓨ⾜ᖺ᭶㸸1998ᖺ11᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, M. Suzuki, N. Edagawa, and S. Yamamoto
㹌㹭
᪩
᪩✄⏣Ꮫ ༤ኈ㸦ᕤᏛ㸧 Ꮫ⏦ㄳ ◊✲ᴗ⦼᭩
✀㢮ู 㢟ྡࠊ Ⓨ⾲࣭Ⓨ⾜ᥖ㍕ㄅྡࠊ Ⓨ⾲࣭Ⓨ⾜ᖺ᭶ࠊ 㐃ྡ⪅㸦⏦ㄳ⪅ྵࡴ㸧
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
㢟ྡ㸸Study on Optimum Pre-Filtering Condition for 42.7 Gbit/s CS-RZ DPSK Signal
Ⓨ⾲㸸The Optical Fiber Communication Conference 2004, TuF2
Ⓨ⾲ᖺ᭶㸸2004ᖺ2᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, and N. Edagawa
㢟ྡ㸸Detuning Tolerance of 50 GHz-spaced 40 Gbit/s-Based DWDM System
Ⓨ⾲㸸Optoelectronics and Communications Conference 2003, 15D1-4
Ⓨ⾲ᖺ᭶㸸2003ᖺ7᭶
㐃ྡ⪅㸸K. Tanaka, and N. Edagawa
㢟ྡ㸸Study on Capacity Upgrade of JIH(Japan Information Highway) Submarine Cable System Using 40 Gbit/s-based WDM transmission Technologies
Ⓨ⾲㸸National Fiber Optical Engineer Conference 2003, E2-3
Ⓨ⾲ᖺ᭶㸸2003ᖺ9᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, N. Yoshikane, and N. Edagawa
㢟ྡ㸸Present and Future of Ultralong-Haul Optical Fiber Transmission
Ⓨ⾲㸸Nonlinear Physics : Theory and Experiment.II
Ⓨ⾲ᖺ᭶㸸2002ᖺ6᭶ 㐃ྡ⪅㸸K. Tanaka
㢟ྡ㸸Study on the Optimum Signal Format for Long-haul 40 Gbit/s-Based WDM Systems
Ⓨ⾲㸸ITCom 2002
Ⓨ⾲ᖺ᭶㸸2002ᖺ7᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, A. Agata, and N. Edagwa
㢟ྡ㸸Expected Spectral Efficiency by Using Optically Pre-Filtered RZ
Ⓨ⾲㸸The Optical Fiber Communication Conference 2002, Workshop 203
Ⓨ⾲ᖺ᭶㸸2002ᖺ3᭶ 㐃ྡ⪅㸸K. Tanaka
㢟ྡ㸸40 Gbit/s-Based Unrepeatered WDM Transmission Systems
Ⓨ⾲㸸The Optical Fiber Communication Conference 2002, ThFF1
Ⓨ⾲ᖺ᭶㸸2002ᖺ3᭶
㐃ྡ⪅㸸T. Miyakawa, and K. Tanaka
㢟ྡ㸸40 Gbit/s x 25 WDM 306 km Unrepeatered Transmission Using 175Pm2-Aeff Fibre
Ⓨ⾲㸸European Conference on Optical Communication 2001, Mo.F.3.6
Ⓨ⾲ᖺ᭶㸸2001ᖺ9᭶
㐃ྡ⪅㸸K. Tanaka, H. Sakata, T. Miyakawa, I. Morita, K. Imai, and N. Edagawa
㹌㹭
᪩
᪩✄⏣Ꮫ ༤ኈ㸦ᕤᏛ㸧 Ꮫ⏦ㄳ ◊✲ᴗ⦼᭩
✀㢮ู 㢟ྡࠊ Ⓨ⾲࣭Ⓨ⾜ᥖ㍕ㄅྡࠊ Ⓨ⾲࣭Ⓨ⾜ᖺ᭶ࠊ 㐃ྡ⪅㸦⏦ㄳ⪅ྵࡴ㸧
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ᅜ㝿㆟
ࡑࡢࡢ◊
✲ᴗ⦼
㢟ྡ㸸50 GHz-Spaced 40 Gbit/s x 25 WDM Transmission over 480 km Using Bandlimited RZ Signals
Ⓨ⾲㸸Optoelectronics and Communications Conference 2001, TUE1
Ⓨ⾲ᖺ᭶㸸2001ᖺ7᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, and N. Edagwa
㢟ྡ㸸40 Gbit/s-Based WDM Systems with SMF-Based Dispersion Flattened Transmission Line
Ⓨ⾲㸸Research Group for Optical Soliton Communications Symposium 2000
Ⓨ⾲ᖺ᭶㸸2000ᖺ ᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, M. Suzuki, and N. Edagawa
㢟ྡ㸸Impact of Nonlinear Crosstalk in 0.8 nm-Spacing 40 Gbit/s DWDM Systems
Ⓨ⾲㸸Optoelectronics and Communications Conference 2000, 14D4-3
Ⓨ⾲ᖺ᭶㸸2000ᖺ7᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, N. Edagawa, and M. Suzuki
㢟ྡ㸸320 Gbit/s (32 x 10.7 Gbit/s) Error-Free Transmission over 7,280 km Using Dispersion Flattened Fibre Link with Standard SMF and Slope Compensating DCF
Ⓨ⾲㸸European Conference on Optical Communication 1999, WeC4.3
Ⓨ⾲ᖺ᭶㸸1999ᖺ9᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, N. Edagawa, and M. Suzuki
㢟ྡ㸸400 Gb/s Dense WDM Soliton-based RZ Transmission Using Dispersion Flattened Fiber
Ⓨ⾲㸸Research Group for Optical Soliton Communications Symposium 1998
Ⓨ⾲ᖺ᭶㸸1998ᖺ11᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, N. Edagawa, and M. Suzuki
㢟ྡ㸸400 Gbit/s (20 x 20 Gbit/s) Dense WDM Soliton-Based RZ Signal Transmission Using Dispersion Flattened Fibre
Ⓨ⾲㸸European Conference on Optical Communication 1998, pp.85-86
Ⓨ⾲ᖺ᭶㸸1998ᖺ9᭶
㐃ྡ⪅㸸K. Tanaka, I. Morita, M. Suzuki, N. Edagawa, and S. Yamamoto
ㄽᩥ 2௳㸦ඹⴭࠊᣍᚅㄽᩥ ௳ࢆྵࡴ㸧 ᅜ㝿㆟㸦ᰝㄞ㸧 7௳㸦ඹⴭࠊᣍᚅㅮ₇2௳ࢆྵࡴ㸧 ࢳ࣮ࣗࢺࣜࣝㅮ₇㸦ᾏእ㸧 1௳
ゎㄝグ㸦ᩥ㸧 2௳
