Ngokusho kwezindinganiso ze-ITU-T, izintambo ze-optical zokuxhumana zihlukaniswe ngezigaba ezingu-7: G.651 kuya ku-G.657. Uyini umehluko phakathi kwabo?
1, G.651 ifayibha
I-G.651 iyi-Multi-mode fiber, futhi i-G.652 kuya ku-G.657 yonke imicu yemodi eyodwa.
I-fiber optical yakhiwe core, cladding and coating, njengoba kuboniswe kuMfanekiso 1.
Ngokuvamile ububanzi be-cladding buyi-125um, ungqimba olunamathelayo (ngemuva kombala) luyi-250um; futhi i-core diameter ayikho inenani eligxilile, ngoba umehluko we-core diameter uzoshintsha ukusebenza kokudluliswa kwe-fiber optical ibe kukhulu.
Umfanekiso 1. Isakhiwo se-Fiber
Imvamisa ubukhulu be-multimode fiber busuka ku-50um kuye ku-100um. Ukusebenza kokudlulisela kwefayibha kuthuthukiswa kakhulu lapho ububanzi obuyinhloko buba buncane. Njengoba kuboniswe kuMfanekiso 2.
Umfanekiso 2. Ukudluliselwa kwemodi eminingi
Imodi yokudlulisela eyodwa kuphela lapho ububanzi obuyinhloko befayibha buncane kunevelu ethile, njengoba kuboniswe kuMfanekiso 3, okuba umcu wemodi eyodwa.
Umfanekiso 3. Ukudluliselwa kwemodi eyodwa
2, G.652 Ifayibha
I-G.652 optical fibre iyi-fiber optical esetshenziswa kakhulu kunazo zonke.Okwamanje, ngaphezu kwentambo yokukhanya yasekhaya (FTTH) yasekhaya, i-fiber optical esetshenziswa ebangeni elide nendawo yedolobha cishe yonke i-G.652 optical fiber.Futhi amakhasimende a-oda lolu hlobo kakhulu kwa-Honwy.
I-Attenuation ingenye yezinto ezibaluleke kakhulu ezithinta ibanga lokudlulisela le-fiber optical. I-coefficient yokunciphisa i-fiber optical ihlobene nobude be-wavelength. Njengoba kuboniswe ku-Figure 4. Kungabonakala emfanekisweni ukuthi ukuncishiswa kwefayibha ku-1310nm kanye ne-1550nm kuncane kakhulu, ngakho-ke i-1310nm ne-1550nm ibe amafasitela e-wavelength asetshenziswa kakhulu emicu yemodi eyodwa.
Umfanekiso 4. I-attenuation coefficient of single mode fiber
3, G.653 Ifayibha
Ngemuva kokuthi ijubane lezinhlelo zokuxhumana ze-optical likhuphuka ngokuqhubekayo, ukudluliswa kwesignali kuqala ukuthinteka yi-fiber dispersion. I-Dispersion ibhekisela ekuhlanekezeleni kwesignali (ukunwetshwa kwe-pulse) okubangelwa izingxenye ezihlukene zefrikhwensi noma izingxenye zemodi ehlukene yesignali (i-pulse) esakazeka ngesivinini esihlukile futhi ifinyelela ebangeni elithile, njengoba kuboniswe kuMfanekiso 5.
Umfanekiso 5. Ukuhlakazwa kwe-fiber
I-coefficient yokusabalalisa ye-fiber optical nayo ihlobene nobude begagasi, njengoba kuboniswe kuMfanekiso 6. I-fiber yemodi eyodwa ine-coefficient encane yokunciphisa ku-1550 nm, kodwa i-coefficient yokusabalalisa kulobu bude beza bukhulu. Ngakho-ke abantu bathuthukise i-fiber yemodi eyodwa ene-dispersion coefficient engu-0 ku-1550nm. Le fibre ebonakala iphelele i-G.653.
Umfanekiso 6. I-coefficient yokusabalalisa ye-G.652 ne-G.653
Kodwa-ke, ukuhlakazwa kwe-fiber optical yi-0 kodwa ayifanele ukusetshenziswa kwezinhlelo ze-wavelength division (WDM), ngakho-ke i-G.653 fiber optical yaqedwa ngokushesha.
4, G.654 Ifayibha
I-G.654 i-optical fiber isetshenziswa kakhulu ezinhlelweni zokuxhumana zamakhebula angaphansi kolwandle. Ukuze kuhlangatshezwane nezidingo zebanga elide nezomthamo omkhulu wokuxhumana kwamakhebula angaphansi kolwandle.
5, G.655 Fiber
I-G.653 fiber ino-zero dispersion ku-1550nm wavelength futhi ayisebenzisi isistimu ye-WDM, ngakho-ke i-fiber ene-dispersion encane kodwa engeyona iqanda ku-1550nm wavelength yathuthukiswa. Lena i-G.655 fiber. I-G.655 ifayibha ene-attenuation encane kakhulu eduze kwe-wavelength engu-1550nm, ukuhlakazeka okuncane hhayi uziro, futhi ingasetshenziswa ezinhlelweni ze-WDM; Ngakho-ke, i-G.655 fibre kube ukukhetha kokuqala kwemigqa yetrunk yebanga elide iminyaka engaphezu kwengu-20 cishe ngo-2000. I-coefficient yokunciphisa kanye ne-dispersion coefficient ye-G.655 fiber iboniswa kuMfanekiso 7.
Umfanekiso 7. I-coefficient yokusabalalisa ye-G.652/G.653/G.655
Kodwa-ke, i-fiber optical enhle enjalo nayo ibhekene nosuku lokuqedwa. Ngokuvuthwa kobuchwepheshe besinxephezelo sokuhlakazwa, i-G.655 fiber ithathelwe indawo yi-G.652 fiber. Kusukela cishe ngo-2005, imigqa ye-trunk yebanga elide yaqala ukusebenzisa i-G.652 fiber optical ngezinga elikhulu. Njengamanje, i-G.655 optical fiber cishe isetshenziselwa ukugcinwa komugqa wokuqala webanga elide.
Kunesinye isizathu esibalulekile sokuthi kungani i-G.655 fiber iqedwa:
Izinga lobubanzi benkambu yemodi ye-G.655 fiber ngu-8～11μm (1550nm). Ububanzi bensimu yemodi yezintambo ezikhiqizwa abakhiqizi be-fiber abahlukene bangase babe nomehluko omkhulu, kodwa akukho mehluko ohlotsheni lwefayibha, futhi i-fiber enomehluko omkhulu kububanzi bensimu yemodi ixhunyiwe Ngezinye izikhathi kuba khona ukuncishiswa okukhulu, okuletha okukhulu. ukuphazamiseka ekunakekeleni; Ngakho-ke, ohlelweni lwe-trunk, abasebenzisi bazokhetha i-G.652 fibre kune-G.655, noma ngabe idinga izindleko zokunxeshezelwa ngokuhlakazeka okukhulu.
6, G.656 Ifayibha
Ngaphambi kokwethula i-G.656 fiber optical, ake sibuyele emuva enkathini lapho i-G.655 ibusa imigqa yeziqu ezide.
Ngokombono wezici zokunciphisa, i-G.655 fiber ingasetshenziselwa ukuxhumana ebangeni le-wavelength ukusuka ku-1460nm kuya ku-1625nm (ibhendi ye-S+C+L), kodwa ngenxa yokuthi i-coefficient yokuhlakazeka ye-fiber engaphansi kwe-1530nm incane kakhulu, ayikho. ilungele ukuhlukaniswa kwe-wavelength (WDM). ) uhlelo olusetshenzisiwe, ngakho-ke ububanzi be-wavelength obusebenzisekayo be-G.655 fibre yi-1530nm～1525nm (ibhendi ye-C+L).
Ukuze wenze ibanga le-wavelength elingu-1460nm-1530nm (i-S-band) le-fiber optical nalo lingasetshenziselwa ukuxhumana, zama ukunciphisa ukuhlakazeka kwe-G.655 fiber optical, okuba yi-G.656 fiber optical. I-coefficient yokuncipha kanye ne-dispersion coefficient ye-G.656 fibre iboniswa kuMfanekiso 8.
Umfanekiso 8
Ngenxa yemiphumela engeyona eqondile ye-fiber optical, inani lamashaneli kumasistimu we-WDM amabanga amade ngeke likhuphuke kakhulu, kuyilapho izindleko zokwakha ze-metropolitan area optical fibers ziphansi kakhulu. Akunangqondo ukwandisa inani lamashaneli ezinhlelweni ze-WDM. Ngakho-ke, i-current dense wavelength division (DWDM) ) Ikakhulukazi iseyi-80/160 wave, i-C+L wave band ye-fiber optical yanele ukuhlangabezana nesidingo. Ngaphandle kwalapho amasistimu anesivinini esikhulu anezidingo ezinkulu zesikhala sesiteshi, i-G.656 fiber ayisoze yaba nokusetshenziswa okukhulu.
6, G.657 Ifayibha
I-G.657 i-optical fiber iyona esetshenziswa kakhulu i-optical fiber ngaphandle kwe-G.652. Intambo yokubona esetshenziselwa ikhaya le-FTTH izacile kunolayini wefoni, inefayibha ye-G.657 ngaphakathi.Uma udinga imininingwane eyengeziwe ngayo, pls thola ku-https://www.gl-fiber.com/bare-optical-fiber / noma i-imeyili ku [i-imeyili ivikelwe], Ngiyabonga!