1. Umehluko phakathi kwama-transceivers e-fiber optic e-single-mode kanye nama-multi-mode
Ububanzi obuphakathi be-fiber ye-multimode bungu-50~62.5μm, ububanzi obungaphandle be-cladding bungu-125μm, kanti ububanzi obuphakathi be-fiber ye-single-mode bungu-8.3μm, kanti ububanzi obungaphandle be-cladding bungu-125μm. Ama-wavelength asebenzayo e-fiber optical angama-0.85 μm kuma-wavelength amafushane, ama-1.31 μm kanye nama-1.55 μm kuma-wavelength amade. Ukulahleka kwe-fiber ngokuvamile kuncipha nge-wavelength, ukulahleka okungu-0.85μm kungu-2.5dB/km, ukulahleka okungu-1.31μm kungu-0.35dB/km, kanti ukulahleka okungu-1.55μm kungu-0.20dB/km, okuwukulahlekelwa okuncane kakhulu kwe-fiber, ubude be-wavelength obungu-1.65. Ukulahlekelwa okungaphezu kwe-μm kuvame ukwanda. Ngenxa yomphumela wokumuncwa kwe-OHˉ, kuneziqongo zokulahlekelwa ezibangeni eliphakathi kuka-0.90~1.30μm no-1.34~1.52μm, futhi lezi zigaba ezimbili azisetshenziswa ngokugcwele. Kusukela ngawo-1980, imicu yemodi eyodwa ibilokhu isetshenziswa, kanti ubude obude obungu-1.31 μm busetshenziswe kuqala.
I-fibre yemodi eminingi
I-fibre ye-Multimode: Ingaphakathi lengilazi eliphakathi lijiyile (50 noma 62.5μm), elingadlulisa ukukhanya ngezindlela eziningi. Kodwa ukusabalala kwalo phakathi kwe-modal kukhulu, okukhawulela imvamisa yokudlulisa izimpawu zedijithali, futhi kuzoba kubi kakhulu ngokwanda kwebanga. Isibonelo: i-fibre engu-600MB/KM ine-bandwidth engu-300MB kuphela ku-2KM. Ngakho-ke, ibanga lokudluliselwa kwe-fibre ye-multimode lifushane kakhulu, ngokuvamile lingamakhilomitha ambalwa kuphela.
i-fiber yemodi eyodwa
I-fiber yemodi eyodwa (I-Fiber yemodi eyodwa): Ingaphakathi lengilazi eliphakathi lincane kakhulu (ububanzi be-core ngokuvamile buyi-9 noma i-10 μm), futhi imodi eyodwa kuphela yokukhanya ingadluliselwa. Ngakho-ke, ukusabalala kwayo phakathi kwe-intermodal kuncane kakhulu, okufanele ukuxhumana ibanga elide, kodwa kukhona nokusabalala kwezinto ezibonakalayo kanye nokusabalala kwe-waveguide, ngakho-ke i-fiber yemodi eyodwa inezidingo eziphakeme kububanzi be-spectral kanye nokuqina komthombo wokukhanya, okungukuthi, ububanzi be-spectral kufanele bube buncane futhi buzinzile. Yiba muhle. Kamuva, kwatholakala ukuthi kubude be-wavelength obuyi-1.31 μm, ukusabalala kwezinto ezibonakalayo kanye nokusabalala kwe-waveguide ye-fiber yemodi eyodwa kukuhle futhi kubi, futhi ubukhulu bufana ncamashi. Lokhu kusho ukuthi kubude be-wavelength obuyi-1.31 μm, ukusabalala okuphelele kwe-fiber yemodi eyodwa kungu-zero. Kusukela ezicini zokulahlekelwa kwe-fiber, i-1.31μm imane nje ifasitela lokulahlekelwa okuphansi kwe-fiber. Ngale ndlela, isifunda sobude be-wavelength esingu-1.31μm sesibe yifasitela elifanele lokusebenza lokuxhumana nge-optical fiber, futhi futhi siyibhendi eliyinhloko lokusebenza kwezinhlelo zokuxhumana nge-optical fiber ezisebenzayo. Amapharamitha ayinhloko e-1.31μm i-fiber evamile yemodi eyodwa anqunywa yi-International Telecommunication Union ITU-T kusincomo se-G652, ngakho-ke le fiber ibizwa nangokuthi i-G652 fiber.
Ingabe ubuchwepheshe bemodi eyodwa kanye nobemodi eminingi bukhiqizwa ngesikhathi esisodwa? Ingabe kuyiqiniso ukuthi obuthuthuke kakhulu kanye nobemodi eminingi buthuthuke kakhulu? Ngokuvamile, imodi eminingi isetshenziselwa amabanga amafushane, futhi imodi eyodwa kuphela esetshenziswa amabanga amade, ngoba ukudluliselwa nokwamukelwa kwemicu yemodi eminingi Idivayisi ishibhile kakhulu kunemodi eyodwa.
I-fiber yemodi eyodwa isetshenziselwa ukudlulisa idatha ebangeni elide, kanti i-fiber yemodi eminingi isetshenziselwa ukudlulisa idatha yangaphakathi. I-fiber eyodwa kuphela engasetshenziswa ebangeni elide, kodwa i-multi-mode ayisetshenziswa ngempela ekudluliseni idatha yangaphakathi.
Ukuthi imicu ye-optical esetshenziswa kumaseva namadivayisi okugcina izinto i-single-mode noma i-multi-mode Iningi lazo lisebenzisa i-multi-mode, ngoba ngisebenza kuphela kuma-optical fibers okuxhumana futhi angicaci kahle ngale nkinga.
Ingabe imicu ye-optical kufanele isetshenziswe ngamabili, futhi ingabe ikhona imishini efana neziguquli zesignali ye-fiber yemodi eyodwa enembobo eyodwa?
Ingabe i-optical fiber kufanele isetshenziswe ngamabili? Yebo, engxenyeni yesibili yombuzo, ingabe uhlose ukudlulisa nokwamukela ukukhanya ku-optical fiber eyodwa? Lokhu kungenzeka. Inethiwekhi ye-optical fiber yomgogodla ye-China Telecom engu-1600G inje.
Umehluko obaluleke kakhulu phakathi kwama-transceiver e-fiber optic e-single-mode kanye nama-transceiver e-fiber optic e-multi-mode ibanga lokudlulisela. I-transceiver ye-fiber optic ye-multi-mode iyi-transmission yesignali ye-multi-node kanye ne-multi-port kwimodi yokusebenza, ngakho-ke i-transmission yebanga lesignali imfushane kakhulu, kodwa ilula kakhulu, futhi akudingekile ukusebenzisa ukwakhiwa kwe-intranet yendawo. I-fiber eyodwa iyi-transmission ye-node eyodwa, ngakho-ke ifanelekela ukudluliselwa kwemigqa ye-trunk ende futhi yakha ukwakhiwa kwenethiwekhi yendawo enqamula idolobha.
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2. Indlela yokuhlukanisa ama-transceivers e-fiber optic e-single-mode kanye nama-multi-mode
Ngezinye izikhathi, sidinga ukuqinisekisa uhlobo lwe-transceiver ye-fiber optic, ngakho-ke singanquma kanjani ukuthi i-transceiver ye-fiber optic iyimodi eyodwa noma imodi eminingi?
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1. Hlukanisa ekhanda elinempandla, khipha isivalo sothuli sekhanda elinempandla se-fiber optic transceiver, bese ubheka umbala wezingxenye zesixhumi esibonakalayo ekhanda elinempandla. Uhlangothi lwangaphakathi lwesixhumi esibonakalayo se-TX ne-RX semodi eyodwa lumbozwe nge-ceramics emhlophe, kanti isixhumi esibonakalayo semodi eminingi sinsundu.
2. Hlukanisa kumodeli: ngokuvamile bona ukuthi kukhona yini u-S no-M kumodeli, u-S usho imodi eyodwa, u-M usho imodi eningi.
3. Uma isifakiwe futhi isetshenzisiwe, ungabona umbala we-fiber jumper, i-orenji inemodi eminingi, ophuzi unemodi eyodwa
Isikhathi sokuthunyelwe: Septhemba-01-2022