1. Ibyiciro byaFkoherezaAmplifiers
Hariho ubwoko butatu bwingenzi bwa optique yongerera imbaraga:
(1) Semiconductor Optical Amplifier (SOA, Semiconductor Optical Amplifier);
(2) Amashanyarazi ya fibre optique yometse kubintu bidasanzwe byisi (erbium Er, thulium Tm, praseodymium Pr, rubidium Nd, nibindi), cyane cyane erbium-fop fibre amplifier (EDFA), kimwe na thulium-dope fibre amplifier (TDFA) hamwe na praseodymium-dope fibre amplifier (PDFA), nibindi.
.Igikorwa nyamukuru cyo kugereranya izi optique zongera imbaraga zirerekanwa mumeza
EDFA (Erbium Doped Fibre Amplifier)
Sisitemu yo murwego rwa lazeri irashobora gushirwaho mugukoporora fibre ya quartz hamwe nibintu bidasanzwe byubutaka (nka Nd, Er, Pr, Tm, nibindi), kandi itara ryerekana ibimenyetso byinjira byongerewe imbaraga mumikorere yumucyo wa pompe.Nyuma yo gutanga ibitekerezo bikwiye, hashyizweho fibre fibre.Uburebure bwumurongo wa Nd-doped fibre amplifier ni 1060nm na 1330nm, kandi iterambere ryayo nogukoresha ni bike kubera gutandukana nicyambu cyiza cyogutumanaho cya fibre optique nizindi mpamvu.Uburebure bwumurongo wa EDFA na PDFA buri mumadirishya yigihombo gito (1550nm) hamwe na zero dispersion ya zero (1300nm) ya fibre optique, kandi TDFA ikorera muri S-band, ikwiranye cyane na sisitemu yo gutumanaho ya fibre optique. .Cyane cyane EDFA, iterambere ryihuse, ryabaye ingirakamaro.
UwitekaPrinciple ya EDFA
Imiterere shingiro ya EDFA yerekanwa mu gishushanyo cya 1 (a), igizwe ahanini nigikoresho gikora (fibre ya erbium-dope silika fibre igera kuri metero icumi z'uburebure, hamwe na diameter yibanze ya microni 3-5 hamwe na doping yibanze ya (25) -1000) x10-6), pompe yumucyo (990 cyangwa 1480nm LD), guhuza optique hamwe na optique ya optique.Itara ryibimenyetso na pompe birashobora gukwirakwira mu cyerekezo kimwe (pompe codirectional pompe), icyerekezo gitandukanye (pompe revers) cyangwa ibyerekezo byombi (pomping byerekezo) muri fibre ya erbium.Iyo itara ryibimenyetso hamwe nu rumuri rwa pompe byinjijwe muri fibre ya erbium icyarimwe, ion ya erbium ishimishwa nurwego rwingufu nyinshi bitewe nigikorwa cyurumuri rwa pompe (Igicapo 1 (b), sisitemu yinzego eshatu), kandi kwangirika vuba kurwego rwingufu zishobora kugerwaho, iyo isubiye mubutaka munsi yumucyo wibimenyetso byerekana ibimenyetso, isohora fotone ihuye numucyo wikimenyetso, kugirango ikimenyetso cyongerwe.Igishushanyo 1 (c) nicyo cyongeweho imyuka yangiza (ASE) ifite umurongo munini (kugeza kuri 20-40nm) hamwe nimpinga ebyiri zihwanye na 1530nm na 1550nm.
Ibyiza byingenzi bya EDFA ninyungu nyinshi, umuvuduko mwinshi, imbaraga nyinshi zisohoka, pompe ikora neza, igihombo gike, hamwe no kutumva leta ya polarisiyasi.
2. Ibibazo hamwe na Fibre Optical Amplifiers
Nubwo amplifier optique (cyane cyane EDFA) ifite ibyiza byinshi byingenzi, ntabwo ari amplifier nziza.Usibye urusaku rwiyongera rugabanya SNR yikimenyetso, hari izindi nenge, nka:
- Kuringaniza inyungu zunguka muri amplifier bandwidth bigira ingaruka kumikorere myinshi yo kwagura;
- Iyo optique ya optique yongerewe imbaraga, ingaruka zurusaku rwa ASE, gukwirakwiza fibre hamwe ningaruka zitari kumurongo zizarundanya.
Ibi bibazo bigomba gusuzumwa mubikorwa no gushushanya sisitemu.
3. Ikoreshwa rya Optical Amplifier muri Optical Fiber Itumanaho Sisitemu
Muri optique ya fibre itumanaho ya sisitemu, iFibre Optical AmplifierIrashobora gukoreshwa gusa nkimbaraga zongerera imbaraga za transmitter kugirango yongere imbaraga zo kohereza, ariko kandi nkibishobora kubanziriza iyakirwa kugirango irusheho kwiyumvisha neza, kandi irashobora no gusimbuza gakondo optique-amashanyarazi-optique isubiramo, kugirango yongere itumanaho intera kandi umenye itumanaho ryuzuye.
Muri sisitemu yo gutumanaho ya fibre optique, ibintu byingenzi bigabanya intera yoherejwe ni ugutakaza no gukwirakwiza fibre optique.Ukoresheje urumuri rugufi rwumucyo, cyangwa gukora hafi yuburebure bwa zeru-dispersion, ingaruka zo gukwirakwiza fibre ni nto.Sisitemu ntabwo ikeneye gukora ibimenyetso byuzuye byerekana igihe (3R relay) kuri buri sitasiyo.Birahagije kwongera byimazeyo ibimenyetso bya optique hamwe na amplifier optique (1R relay).Amashanyarazi meza arashobora gukoreshwa atari muri sisitemu ndende gusa ariko no mumiyoboro yo gukwirakwiza fibre optique, cyane cyane muri sisitemu ya WDM, kugirango yongere imiyoboro myinshi icyarimwe.
1) Ikoreshwa rya Optical Amplifiers muri Trunk Optical Fiber Sisitemu Yitumanaho
Igishushanyo cya 2 nigishushanyo mbonera cyo gukoresha optique ya optique muri sisitemu yo gutumanaho ya fibre optique..Kurugero, kwemeza EDFA, sisitemu yohereza intera ya 1.8Gb / s yiyongera kuva kuri 120km ikagera kuri 250km cyangwa ikagera no kuri 400km.Igishushanyo 2 (b) - (d) ni ikoreshwa rya optique yongerera imbaraga muri sisitemu nyinshi;Igishushanyo (b) nuburyo bwa 3R bwerekana;Igishushanyo (c) nuburyo buvanze bwa relay ya 3R isubiramo hamwe na optique ya optique;Igishushanyo 2 (d) Nuburyo bwa optique bwo kwerekana;muri sisitemu y'itumanaho ya optique yose, ntabwo ikubiyemo ibihe no kuvugurura ibintu, bityo rero birasobanutse neza, kandi nta "icupa rya elegitoroniki ryitwa whisker".Igihe cyose kohereza no kwakira ibikoresho ku mpande zombi byasimbuwe, Biroroshye kuzamura kuva ku gipimo gito kugera ku gipimo cyo hejuru, kandi amplifier optique ntabwo ikeneye gusimburwa.
2) Ikoreshwa rya Optical Amplifier muri Optical Fiber Network
Imbaraga nyinshi zisohora ibyiza bya optique yongerera imbaraga (cyane cyane EDFA) ni ingirakamaro cyane mumiyoboro yagutse (nkaCATVImiyoboro).Umuyoboro gakondo wa CATV ukoresha umugozi wa coaxial, ugomba kongerwa muri metero magana, kandi radiyo ya serivise ni 7km.Umuyoboro wa fibre optique CATV ukoresheje amplificateur optique ntishobora kongera gusa umubare wabakoresha bagabanijwe, ariko kandi wagura inzira yinzira.Iterambere rya vuba ryerekanye ko ikwirakwizwa rya fibre optique / hybrid (HFC) ikurura imbaraga zombi kandi ifite irushanwa rikomeye.
Igishushanyo cya 4 ni urugero rwumuyoboro wa fibre optique yo gukwirakwiza AM-VSB yo guhindura imiyoboro 35 ya TV.Inkomoko yumucyo wohereza ni DFB-LD ifite uburebure bwa 1550nm nimbaraga zisohoka 3.3dBm.Ukoresheje urwego 4 rwa EDFA nkimbaraga zo gukwirakwiza imbaraga, imbaraga zayo zinjira hafi -6dBm, nimbaraga zayo zisohoka ni 13dBm.Ibyifuzo byakira neza -9.2d Bm.Nyuma yinzego 4 zo gukwirakwiza, umubare wabakoresha wageze kuri miliyoni 4.2, kandi inzira y'urusobe irenga kilometero mirongo.Ikigereranyo kiremereye cyerekana-urusaku rwikizamini cyarenze 45dB, kandi EDFA ntabwo yatumye kugabanuka kwa CSO.
Igihe cyo kohereza: Apr-23-2023