Njengoba sonke sazi, i-multimode fiber ivame ukuhlukaniswa nge-OM1, OM2, OM3 kanye ne-OM4.Khona-ke kuthiwani nge-fiber yemodi eyodwa?Eqinisweni, izinhlobo zefiber yemodi eyodwa zibonakala ziyinkimbinkimbi kakhulu kune-multimode fiber.Kunemithombo emibili eyinhloko yokucaciswa kwe-fiber optical mode eyodwa.Enye iwuchungechunge lwe-ITU-T G.65x, kanti enye i-IEC 60793-2-50 (eshicilelwe njenge-BS EN 60793-2-50).Kunokuba ngibhekisele kukho kokubili amagama e-ITU-T ne-IEC, ngizonamathela kuphela ku-ITU-T G.65x elula kulesi sihloko.Kunezicaciso eziyi-19 zemodi eyodwa yefiber optical fibre echazwe yi-ITU-T.
Uhlobo ngalunye lunendawo yalo olusetshenziswayo futhi ukuvela kwalokhu kucaciswa kwe-fiber optical kubonisa ukuvela kobuchwepheshe besistimu yokudlulisela kusukela ekufakweni kokuqala kwe-fiber optical yemodi eyodwa kuze kube namuhla.Ukukhetha okulungile kuphrojekthi yakho kungaba okubalulekile ngokuya ngokusebenza, izindleko, ukwethembeka nokuphepha.Kulokhu okuthunyelwe, ngingase ngichaze kabanzi mayelana nomehluko phakathi kokucaciswa kochungechunge lwe-G.65x lwemindeni yemodi eyodwa ye-fiber optical.Ngithemba ukukusiza wenze isinqumo esifanele.
G.652
I-ITU-T G.652 fiber yaziwa nangokuthi i-SMF ejwayelekile (i-fiber yemodi eyodwa) futhi iyifayibha esetshenziswa kakhulu.Iza ngezinhlobo ezine (A, B, C, D).U-A no-B banenani eliphakeme lamanzi.I-C no-D iqeda ukuphakama kwamanzi ukuze kusebenze i-spectrum egcwele.Amafayibha e-G.652.A kanye ne-G.652.B adizayinelwe ukuthi abe ne-zero-dispersion wavelength eduze kuka-1310 nm, ngakho alungiselelwa ukusebenza kubhendi engu-1310-nm.Bangakwazi futhi ukusebenza ebhendini engu-1550-nm, kodwa ayilungiselelwanga lesi sifunda ngenxa yokuhlakazeka okukhulu.Lezi zintambo ezibonakalayo zivame ukusetshenziswa ngaphakathi kwe-LAN, MAN kanye nezinhlelo zenethiwekhi zokufinyelela.Okuhlukile kwakamuva kakhulu (i-G.652.C ne-G.652.D) zifaka isiqongo samanzi esincishisiwe esiwavumela ukuthi asetshenziswe esifundeni se-wavelength phakathi kuka-1310 nm no-1550 nm asekela ukudluliswa kwe-Coarse Wavelength Division Multiplexed (CWDM).
G.653
I-G.653 i-fiber yemodi eyodwa yathuthukiswa ukuze kubhekwane nalokhu kungqubuzana phakathi komkhawulokudonsa ongcono kakhulu kunobude obubodwa nokulahlekelwa okuphansi kwenye.Isebenzisa isakhiwo esiyinkimbinkimbi kakhulu endaweni ewumgogodla kanye nendawo ewumgogodla encane kakhulu, futhi ubude begagasi be-zero chromatic dispersion yagudluzwa yafika ku-1550 nm ukuze ihambisane nokulahlekelwa okuphansi kakhulu kwefayibha.Ngakho-ke, i-G.653 fiber ibizwa nangokuthi i-dispersion-shifted fiber (DSF).I-G.653 inosayizi omaphakathi oncishisiwe, olungiselelwa amasistimu okudlulisela emodi eyodwa ehamba ibanga elide kusetshenziswa ama-erbium-doped fiber amplifiers (EDFA).Kodwa-ke, ukugxila kwamandla aphezulu ku-fiber core kungase kukhiqize imiphumela engaqondile.Enye yezinto ezihlupha kakhulu, ezine-wave mixing (FWM), yenzeka ohlelweni lweDense Wavelength Division Multiplexed (CWDM) olunohlaka oluyiziro chromatic, oludala ukungqubuzana okungamukeleki nokuphazamiseka phakathi kwamashaneli.
G.654
Ukucaciswa kwe-G.654 okunesihloko esithi "Izici ze-cut-off eguquliwe imodi eyodwa i-optical fiber nekhebuli."Isebenzisa usayizi oyinhloko okhudlwana owenziwe nge-silica ehlanzekile ukuze kuzuzwe ukusebenza okufanayo kobude obude ngokuncishiswa okuphansi kubhendi engu-1550-nm.Imvamisa futhi inokusabalalisa okuphezulu kwe-chromatic ku-1550 nm, kodwa ayiklanyelwe ukusebenza ku-1310 nm nhlobo.Ifayibha ye-G.654 ingakwazi ukuphatha amazinga aphezulu wamandla phakathi kuka-1500 nm no-1600 nm, eklanyelwe kakhulu izinhlelo zokusebenza ezidonswa isikhathi eside ngaphansi kolwandle.
G.655
I-G.655 yaziwa njenge-non-zero dispersion-shifted fiber (NZDSF).Inenani elincane, elilawulwayo lokuhlakazeka kwe-chromatic ku-C-band (1530-1560 nm), lapho ama-amplifiers asebenza kahle kakhulu, futhi inendawo eyinhloko enkulu kune-G.653 fiber.Ifayibha ye-NZDSF inqoba izinkinga ezihambisana nokuxutshwa kwamagagasi amane neminye imiphumela engaqondile ngokuhambisa ubude begagasi be-zero-dispersion ngaphandle kwewindi lokusebenza le-1550-nm.Kunezinhlobo ezimbili ze-NZDSF, ezaziwa ngokuthi (-D)NZDSF kanye (+D)NZDSF.Anomthambeka ongemuhle kanye nophozithivu ngokulandelana kwawo uma kuqhathaniswa nobude begagasi.Isithombe esilandelayo sibonisa izakhiwo zokusabalalisa zezinhlobo ezine zefayibha yemodi eyodwa eyinhloko.Ukuhlakazwa kwe-chromatic okujwayelekile kwefayibha ethobelayo ye-G.652 ngu-17ps/nm/km.Imicu ye-G.655 yayisetshenziselwa ngokuyinhloko ukusekela amasistimu amade asebenzisa ukudluliswa kwe-DWDM.
G.656
Kanye namafayibha asebenza kahle kulo lonke uhla lwamaza wamaza, amanye aklanyelwe ukusebenza kahle kakhulu kumaza amaza athile.Lena i-G.656, ebizwa nangokuthi i-Medium Dispersion Fiber (MDF).Idizayinelwe ukufinyelela kwendawo kanye ne-fiber yokudonsa isikhathi eside eyenza kahle ku-1460 nm naku-1625 nm.Lolu hlobo lwefayibha lwenzelwe ukusekela amasistimu amade amade asebenzisa ukudluliswa kwe-CWDM ne-DWDM phezu kwebanga le-wavelength elicacisiwe.Futhi ngesikhathi esifanayo, ivumela ukuthunyelwa kalula kwe-CWDM ezindaweni zamadolobha amakhulu, futhi kwandise umthamo we-fiber ezinhlelweni ze-DWDM.
G.657
I-G.657 optical fibers ihloselwe ukusebenzisana nama-G.652 optical fibers kodwa abe nokusebenza okuhlukile kokuzwela kokugoba.Yenzelwe ukuvumela imicu ukuthi igobe, ngaphandle kokuphazamisa ukusebenza.Lokhu kufezwa ngomsele obonayo obonisa ukukhanya okulahlekile kubuyele phakathi, kunokuba kulahleke ku-cladding, okuvumela ukugoba okukhulu kwefayibha.Njengoba sonke sazi, ezimbonini ze-cable TV kanye ne-FTTH, kunzima ukulawula indawo egobayo ensimini.I-G.657 iyindinganiso yakamuva yezinhlelo zokusebenza ze-FTTH, futhi, kanye ne-G.652 iyona esetshenziswa kakhulu kumanethiwekhi okugcina efayibha.
Kusukela endimeni engenhla, siyazi ukuthi uhlobo oluhlukile lwefiber yemodi eyodwa lunokusebenza okuhlukile.Njengoba i-G.657 ihambisana ne-G.652, abanye abahleli nabafaki ngokuvamile kungenzeka bahlangabezane nayo.Eqinisweni, i-G657 ine-radius yokugoba enkulu kune-G.652, efaneleka ngokukhethekile izinhlelo zokusebenza ze-FTTH.Futhi ngenxa yezinkinga ze-G.643 esetshenziswa ohlelweni lwe-WDM, manje ayisasetshenziswa, ithathelwa indawo yi-G.655.I-G.654 isetshenziswa kakhulu ekufakweni kwe-subsea.Ngokwalesi siqephu, ngithemba ukuthi unokuqonda okucacile kwale micu yemodi eyodwa, okungakusiza wenze isinqumo esifanele.
Isikhathi sokuthumela: Sep-03-2021