ȓǤǦǓɓɭʀȴɱɁ♠ಐӟɝȩȬɘ⢡Ј⾷2⾸
গ૓⦖Ό⢌ȿɁɎɨ᧸ոᄃⓝӈɝȩȬɘጋ೙Ή᰷ɝɀȷɱ

ӟ⯍੿ཪ⒈ᮾ᳣ཀࣦ ❟⮤ ‫ٺ‬

Optical ˆber communications [II]Dispersion compensation optical ˆber used for high capacitytransmission system
Masahiro Horikoshi
Fujikura Ltd. Optics and Electronics Laboratory㑭.

ǾǧȐǺ֭अǺǙǓǵ⾻গ૓⦖ WDM Ό⢌ȿɁɎɨ㑮.

DCF ǺȗȚӟΌ⢌➇ǽոᄃɦɕɀɩɻɐ

ǶǾୋཀ᫢ǹᗢ⫧ոᄃǛ⯈ǶǹǞΌ⢌➇ӴΧǷ

DCF Ǿ⾻ᅝǺ⡻ȈǮȗǕǺΌ⢌᧸ӟɝȩȬǦǵǾᗢ⫧ేࣕӴΧǺȞǮǲǵᗢ⫧ոᄃȡȊȋɘǽᗢ⫧ոᄃȡⓝӈǦǵΌ⢌➇ӴΧǷǦǵǽո⯈ǷǨȚǮȐǺ⾻Ό⢌᧸ӟɝȩȬɘǷոᄃⓝӈᄃоȡȊȋ⯈ǺǦȗǕǷǨȚȑǽǶǑș⾻ഝ֊ɝȩȬɘ⾷DCF: Dispersion Compensation op-Ǿ⾻ᅝ▚ǽ 1.3 mm ేȿɻȸɳɪʀɑɝȩȬɘ

tical Fiber⾸ȡẻȎ۰ȞǪǮ⓹۰ἠ➇ȡᐦ༔Ǩ

⾷SMF: Single-Mode Fiber ⾸Ό⢌ȿɁɎɨǺǙȚǢǷȗǲǵ‫⃆۝‬ǺǦǵǓȚǢǷȡ⡻ȈǮƹሬ

Ǔǵ 1.55 mm ేǶⶲ⢦Ό⢌ȿɁɎɨȡીᥰǨ⡨ǶǾǤȘǹȚগ૓⦖‫ك‬ȡᬶ࿀ǦǵΌ⢌ᗢ⫧ేȚǮȐǺ⫳᫘ǤțǮƹǢǽ DCF ǷǦǵǾ⾻ࣕȡ൝ቻǽ C ɘɻɑ⾷ 1530 」 1565 nm ⾸Ǻ‫ף‬

SMF ǽ 1.55 mm ేǺǙǠȚẇ 17 ps / km / nm

Ǘǵ⾻ L ɘɻɑ⾷ 1565 」 1625 nm ⾸⾻ S ɘɻɑǽᗢ⫧ոᄃȡⓝӈǨȚǢǷȡᬶ᫢ǷǦǵոᄃⓝ

⾷ 1460 」 1530 nm ⾸ȇǷྮগǤǪȚᎰ╿ǛǙǢӈ⦖ǛগǜǞ⾻᧯᧳මǺ⬄Ǧǵሱ֐ǹࡖ 1 A )ǹȞțǵǙș⾻Ǣǽᐯǹ౺ేࣕǶᗢ⫧ոᄃȡ֝ǽᐯǹ‫ٸ‬஠ࢪǽ୓ླྀ᤹ոళǛ᧸ǓȘțǵǓǮ1)ƹ

൧ǨȚǮȐǺ⾻ոᄃⓝӈɝȩȬɘǽ⦔┶මǛȍ

DCF ȡΌ⢌➇ǺẻȎ⡛Ȣǯ⭾ǽΌ⢌➇ӴΧǨȍǨⶲȍǲǵǓȚƹǬǢǶ͑ࡋǾ⾻ոᄃⓝӈǽոᄃо DT Ƿ၏ড aT ǾͨˁǽᐯǺ⒙ǨǢǷɝȩȬɘǺǳǓǵ⡻ȈǮǓǷථǕƹǛǶǜȚƹDT⿌DlineLline⾺DDCFLDCF
ǉ285㏏
8550 ٣⊡᭔ΤУలӹற 1440
ጋ ɝɀȷɱ㎥
TEL 043㏏
484㏏
3944
FAX 043㏏
481㏏
1210
E-mail: hori⿏lab.fujikura.co.jp

aT⿌alineLline⾺aDCFLDCF⾷ 1)Ǣ Ǣ Ƕ Dline ⾻ DDCF Ǿ Ό ⢌ ᧸ ɝ ȩ Ȭ ɘ ‫ ڽ‬ȂDCF ǽᗢ⫧ոᄃ⾻ aline ⾻ aDCF ǾΌ⢌᧸ɝȩȬɘ‫ڽ‬Ȃ DCF ǽΌ⢌၏ড⾻ Lline ‫ڽ‬Ȃ LDCF ǾΌ
37

NEW GLASS Vol. 17 No. 3 2002

⒙㑭 ոᄃⓝӈɝȩȬɘǽᣀමόࡖ㑭 ոᄃⓝӈɝȩȬɘǽ୓ླྀ᤹ոళό⢌᧸ɝȩȬɘ‫ڽ‬Ȃ DCF ǽ⫧ǤǶǑȚƹ⢡౐

DCF Ǿ⾻Ό⢌᧸ӟɝȩȬɘǷᕉȈǵᕉ୓ླྀ᤹ఞǛগǜǞΌ⢌၏ডǛগǜǓǮȐ⾻ DCF ǽ⣏‫׀‬၏ডոȡӟɝȩȬɘȪɻɟǽ֐ൡǶⓝӈǨȚǢǷǺǹȚƹ൝ǲǵ DCF ǷǦǵǾ⾻গǜǹ⛤ǽոᄃоȡȑǳǷǷȑǺ΢Ό⢌၏ডǶǑȚǢǷǛሿȍǦǞ⾻Ǣǽම⃆࿀ᑙǷǦǵ‫ٸ‬Ρ၏ডഝǮșǽոᄃⓝӈ⦖ǷǦǵᓎ೙Ƕ઻ῲǤțȚ FOM(Figure of Merit⾸ǷǓǕəɱɩʀɇǛ᧸ǓȘ
țǵǓȚƹ

FOM⿌

DDCF
⾷ps/nm/dB⾸
aDCF

⾷ 2⾸

ࡖ㑮 ոᄃⓝӈɝȩȬɘȡ᧸ǓǮӟɝȩȬɘΌ⢌➇ǽᗢ⫧ոᄃᣀම3)Ǣǽ⭾⾻Ό⢌ἠ➇ӴΧǽոᄃȡલӴǺⓝӈǨȚ⾻ǨǹȞǰ DT⿌0 Ƿͪ઻ǨȚǷ DCF ǽոᄃࡖ 1 B ⾸⾻ C )ǺᰳǦǮ 2 ⦔ȑǦǞǾ 3 ⦔ȷɱɋоǷɝȩȬɘ⫧ǽ⬄ϭǛᕷȐȘțȚƹȍǮǬǽɑࢪᵱǽ⓹⮰ǹ୓ླྀ᤹ոళǺǹǲǵǓȚƹǷǜǽΌ⢌➇ӴΧǽ၏ড aT Ǿ⾻ FOM ȡ᧸ǓǢǽᐯǹ DCF ǽම⃆࿀ᄋǷǦǵ⾻ӟɝȩȬǵͨˁǽᐯǺᰳǨǢǷǛǶǜ⾻ DCF Ǻ⬄Ǧǵɘǽᗢ⫧ոᄃоǺଓǨȚոᄃɁɵʀɟǽᕉǷǦǾ FOM ǽȎǶΌ⢌➇ǽ၏ডǛᖑ઻ǤțȚƹ(aT⿌ alim⾺)

Dlim
Llim ⾷dB⾸
FOM

⾷ 3⾸

WDM Ό⢌ȿɁɎɨǺǙǓǵȑ۴ᐯǺΌ⢌ǵᓎ೙Ƕ઻ῲǤțȚəɱɩʀɇ RDS ⾷ Rela-tive Dispersion Slope⾸Ǜ᧸ǓȘțȚƹRDS⿌S
⾷1/nm⾸D

⾷ 4⾸➇ǽոᄃȡⓝӈǨȚǮȐǺ DCF Ǜ᧸ǓȘțȚǢǢǶ S Ǿ DCF ǽոᄃɁɵʀɟ⾻D ǾոᄃǛ⾻Ό⢌⢦ಏǽⶲ⢦‫ك‬ǙȗȂɉɫɻɕɳᄋǽऻоǶǑȚƹ⒙ 1 Ǻ۬ DCF ǽᣀමό2),3) ȡ⾻ȍ‫ף‬ǺǷȑǹǓ⾻൝ቻ᧸ǓȘțǵǜǮ C ɘɻɑǮࡖ 2 Ǻ Aeff ྮগɝȩȬɘ⾷ EEPDF ⾸Ƿ⒙ 1

ǚȘ L ɘɻɑǺȞǮȚᗢ⫧ᶽࡕǶոᄃǽⓝӈC)ǽ DCF ȡẻȎ۰ȞǪǮ⭾ǽᗢ⫧ոᄃᣀමό

ȡ⒅ǕǮȐǺոᄃɁɵʀɟȍǶⓝӈǨȚർ┶ǛȡᰳǨƹ WDM ȿɁɎɨ᧸Ό⢌➇ǺǙǓǵո᧯ǧ⾻ոᄃɁɵʀɟⓝӈࢪոᄃⓝӈɝȩȬɘᄃɁɵʀɟȍǶⓝӈǨȚǮȐǺǾ⾻Ό⢌᧸ӟ

⾷SCDCF: Slope Compensating and DispersionɝȩȬɘǽ RDS ǺǑǲǮ DCF ȡ▚╹ǨȚർCompensation

Fiber ⾸ Ǜ ⫳ ᫘ Ǥ ț ǵ Ǔ Ț ƹ┶ǛǑȚǛ⾻ʶⅺ᫢ǹ DCF ǽ▚╹ǺǙǓǵո

SCDCF ǶǾոᄃɁɵʀɟȑ֝൧ǨȚǮȐǺ⾻ᄃɁɵʀɟǽởଓоǽȎȡগǜǞǨȚǢǷǾࡓ38

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⮽Ƕ⾻ոᄃоǽởଓоȑǑȚᲦಏগǜǞǹȚᐯǺ▚╹ǪǥȚȡൡǹǓƹǢǽǮȐոᄃⓝӈȡǨȚѩǽ╞᠊ǚȘǾ⾻ RDS оǛତǤǓΌ⢌➇ǽᅀǛȗș౪࢞ǹᗢ⫧ոᄃᣀමȡൡȓǨǞǹȚƹ㑯.

❞౺ేࣕ WDM Ό⢌ȿɁɎɨ᧸ DCFΌ⢌ᗢ⫧ࣕȡǤȘǺྮগǦǮগ૓⦖ WDMȿɁɎɨȡ‬ǗǮई۰⾻ɉɫɻɕɳᄋǽऻ‫ף‬Ƿࡖ㑯 ɱɦɻऻౙǺȗȚ DCF ǽ၏ডⓝӈ᏶ᨪǷȑǺ֭⡻ǦǮ DCF ǽ⣏‫׀‬၏ডոȡⓝӈǨȚǮȐӱ‫מ‬Ј‫ۥ‬ӟəɷʀǛǤȘǺऻগǨȚǢǷǺ
ǹș⾻Aeff ǛତǤǓ⾷ẇ 20 mm2 Ღಏ⾸DCF Ƕᬶ᫢ǷǦǮ❞౺ేࣕ DCF ǽ▿ΰ5) ȑ⒅Ȟțǵ

ǾӟકⰞἠബ‫׼‬እǺȗȚЈ‫ۥ‬ӟᗢബ‫كצ‬ǛުⲤǓȚƹǺǹǲǵǞȚƹǢțǺଓǦǵⰞἠബӟક‫׼‬እǽʶǳǶǑȚ◧ଣɱɦɻᄃ̇ȡ᳒Ꮹ᫢Ǻ֐᧸Ǧ㑰.

ȍǷȐ

ǵ⾻ Aeff ǽତǤǓ DCF Ǻ‫❙״‬ӟȡӱଙǦǵɱগ૓⦖ӟ⢡ЈȿɁɎɨǺ᧸ǓȘțȚΌ⢌➇ǽɦɻऻౙȡ᧯ǧǤǪǵ DCF ǽ၏ডⓝӈǺ֐᧸ᗢ⫧ոᄃǺ᭭ᬶǦǵ⾻Ό⢌᧸ɝȩȬɘǷոᄃ֝ǨȚᎰ╿ȑ⒅ȞțǵǓȚ4)ƹࡖ 3 Ǻɱɦɻऻౙ൧ǨȚǮȐǺ᧸ǓȘțȚոᄃⓝӈɝȩȬɘǺǳȡ᧸ǓǮ DCF ǽ၏ডⓝӈ᏶ᨪࡖȡᰳǨƹǢțǓǵ᏶◻ǦǮƹȪȷɃɁṾǽɞɵʀɑɘɻɑ‫ك‬ȍǶǾ⾻ DCF ǺǙǠȚӟકⰞἠബ‫׼‬እǺȗȚǽ⢳ୠǺǷȑǹǕษअ⢡Јɕɋɐɷʀȷǽগ૓Ј‫ۥ‬ӟᗢബ‫كצ‬ȡཱ֝ǨȚǮȐǺǾ Aeff ȡྮ⦖‫ك‬ǽ┶ᕷǺଓඅǨȚǮȐ⾻ӟɝȩȬɘȡ‫܅‬ȐগǤǪȚർ┶ǛǑǲǮǛ⾻ɱɦɻऻౙȡ᧸ǓȚǮӟ⢡ЈȿɁɎɨǽ⫳᫘Ǿ⾻೟ǜỮǜ⒅Ȟțǵ

ई۰ǾർǩǦȑ Aeff ȡྮগǨȚǢǷǛᓺǦǓǓǞǷථȞțȚƹǷǾ⭈ȘǹǞǹȚƹǢǽǮȐ⾻ DCF ǽᐦ⢧əɱɩʀɇǽሬ⣪‫ك‬ǛǑȘȐǵᎰ╿ǤțǵǓȚƹ
ȍǮ⾻൝ቻǽ DCF ǶǾ⾻ⓝӈ‫⃆۝‬ǹేࣕౙǷӟɝȩȬɘȪɻɟǽऻౙ‫ࣕే⃆۝‬Ƿǽ֝ẇǚ
Ș⾻C ɘɻɑ᧸⾻ㆧɘɻɑ᧸ᵱ⾻WDM Ј‫ేۥ‬ࣕǺඅǧǵХ֌Ǻπ᧸ǨȚǢǷǛ็઻ǤțǵǜǮǛ⾻S 」 L ɘɻɑȍǶȡʶྯⓝӈǨȚǢǷȡ‫‬ڹ‬ᄙᤙ1) M. Ohnishi et al., OFC 96, ThA2 (1996).
1302) K. Mukasa et al., Proc. ECOC '97, vol. 1, 127㏏

(1997).
3) K. Aikawa et al., OFC2001, TuH6㏏1 (2001).
1 (2001).
4) T. Okuno et al., OAA2001, OtuB5㏏
5) Hirano et al., ECOC 2001. Th. M. 1. 4 (2001).

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