Emkhakheni wezokuxhumana, uxhumo lwesikhungo sedatha, nezokuthutha ngevidiyo, i-fiber optic cabling ithandeka kakhulu. Kodwa-ke, iqiniso liwukuthi i-fiber optic cabling ayiseyona inketho eyongayo noma engenzeka ukuthi isetshenziswe kusevisi ngayinye ngayinye. Ngakho-ke ukusebenzisa i-Wavelength Division Multiplexing (WDM) yokwandisa umthamo wefayibha kungqalasizinda yefayibha ekhona kuhle kakhulu. I-WDM ubuchwepheshe obuphindaphinda amasiginali amaningi okubona ku-fiber eyodwa ngokusebenzisa ubude beza obuhlukile bokukhanya kwe-laser. Ucwaningo olusheshayo lwezinkambu ze-WDM luzofakwa ku-CWDM naku-DWDM. Asekelwe emcabangweni ofanayo wokusebenzisa amaza okukhanya amaningi kufiber eyodwa. Kodwa bobabili banokuhle nokubi.
Yini i-CWDM?
I-CWDM isekela iziteshi ze-wavelength ezingafika kwezingu-18 ezidluliselwa ngefayibha ngesikhathi esifanayo. Ukufeza lokhu, amaza ahlukene esiteshi ngasinye ahlukene ngo-20nm. I-DWDM, isekela iziteshi ze-wavelength ezingafika ku-80 ngesikhathi esisodwa, isiteshi ngasinye sihluke ngo-0.8nm kuphela. Ubuchwepheshe be-CWDM bunikeza isixazululo esilula nesingabizi kakhulu samabanga amafushane angafika kumakhilomitha angama-70. Ebangeni eliphakathi kwamakhilomitha angu-40 no-70, i-CWDM ivame ukulinganiselwa ekusekeleni iziteshi eziyisishiyagalombili.
Uhlelo lwe-CWDM luvamise ukusekela amaza angamaza ayisishiyagalombili ngefayibha ngayinye futhi ludizayinelwe ukuxhumana kwebanga elifushane, kusetshenziswa amafrikhwensi anobubanzi obunobude obusabalele ngokuqhelelana.
Njengoba i-CWDM isekelwe esikhaleni sesiteshi esingu-20-nm kusukela ku-1470 kuya ku-1610 nm, ngokuvamile isetshenziswa ku-fiber spans efinyelela ku-80km noma ngaphansi ngenxa yokuthi ama-amplifiers abonakalayo awakwazi ukusetshenziswa neziteshi ezinkulu ezihlukanisa isikhala. Lesi sikhala esibanzi samashaneli sivumela ukusetshenziswa kwezinto zokubona ezinentengo emaphakathi. Nokho, umthamo wezixhumanisi kanye nebanga elisekelwayo lincane nge-CWDM kune-DWDM.
Ngokuvamile, i-CWDM isetshenziselwa izindleko eziphansi, umthamo ophansi (i-sub-10G) kanye nezicelo zebanga elifushane lapho izindleko ziyisici esibalulekile.
Muva nje, izintengo zazo zombili izingxenye ze-CWDM ne-DWDM seziqhathaniseka ngokufanele. Amaza amaza e-CWDM okwamanje ayakwazi ukuthutha afika ku-10 Gigabit Ethernet kanye ne-16G Fiber Channel, futhi mancane amathuba okuba leli khono liqhubeke likhule esikhathini esizayo.
Iyini i-DWDM?
Ngokungafani ne-CWDM, ukuxhumana kwe-DWDM kungakhuliswa futhi, ngakho-ke, kungasetshenziselwa ukudlulisa idatha amabanga amade kakhulu.
Ezinhlelweni ze-DWDM, inani lamashaneli aphindwe kabili liminyene kakhulu kune-CWDM ngoba i-DWDM isebenzisa isikhala sobude obuqinile ukuze ifake iziteshi eziningi kufiber eyodwa.
Esikhundleni sezikhala zamashaneli angu-20 nm ezisetshenziswa ku-CWDM (okulingana cishe nezigidi ezingu-15 GHz), amasistimu e-DWDM asebenzisa iziteshi ezihlukahlukene ezicacisiwe ukusuka ku-12.5 GHz kuya ku-200 GHz ku-C-Band futhi ngezinye izikhathi i-L-band.
Amasistimu e-DWDM anamuhla ngokuvamile asekela amashaneli angu-96 ahlukaniswe ngo-0.8 nm phakathi kwe-spectrum ye-C-Band engu-1550 nm. Ngenxa yalokhu, amasistimu e-DWDM angadlulisela inani elikhulu ledatha ngesixhumanisi esisodwa sefayibha njengoba evumela amaza amaza amaningi ukuthi apakishwe ku-fiber efanayo.
I-DWDM ifaneleka kakhulu ekuxhumaneni okude okungafika ku-120 km nangaphezulu ngenxa yekhono layo lokukhulisa izikhulisa-zwi ezibonakalayo, ezingakhulisa ngempumelelo yonke i-spectrum engu-1550 nm noma ye-C-band evame ukusetshenziswa ezinhlelweni ze-DWDM. Lokhu kunqoba ubude besikhathi sokuncipha noma ibanga futhi uma kukhuliswa i-Erbium Doped-Fiber Amplifiers (EDFAs), amasistimu e-DWDM anamandla okuthwala amanani aphezulu edatha kumabanga amade afinyelela kumakhulu noma izinkulungwane zamakhilomitha.
Ngokungeziwe emandleni okusekela inombolo enkulu yamaza amaza kune-CWDM, amapulatifomu e-DWDM nawo ayakwazi ukuphatha izivumelwano zejubane eliphezulu njengoba abathengisi abaningi bemishini yokuthutha optical namuhla ngokuvamile besekela i-100G noma i-200G ngobude begagasi ngalinye kuyilapho ubuchwepheshe obusafufusa buvumela i-400G nangaphezulu.
I-DWDM vs CWDM wavelength spectrum:
I-CWDM inezikhala zamashaneli ezibanzi kune-DWDM -- umehluko ovamile wokuvama noma ubude begagasi phakathi kwamashaneli okubona amabili aseduze.
Amasistimu e-CWDM ngokuvamile athutha amaza angamaza ayisishiyagalombili ngesikhala seshaneli esingu-20 nm kugridi ye-spectrum ukusuka ku-1470 nm kuya ku-1610 nm.
Amasistimu e-DWDM, ngakolunye uhlangothi, angathwala amaza angama-40, 80, 96 noma afika ku-160 ngokusebenzisa isikhala esincane kakhulu esingu-0.8/0.4 nm (100 GHz/50 GHz grid). Amaza amaza e-DWDM ngokuvamile asuka ku-1525 nm kuya ku-1565 nm (C-band), namanye amasistimu akwazi ukusebenzisa ubude beza obusuka ku-1570 nm ukuya ku-1610 nm (L-band).
Izinzuzo ze-CWDM:
1. Izindleko Eziphansi
I-CWDM ishibhe kakhulu kune-DWDM ngenxa yezindleko zehadiwe. Uhlelo lwe-CWDM lusebenzisa amalaser apholile ashibhe kakhulu kunama-laser angapholisiwe e-DWDM. Ukwengeza, Intengo yama-transceivers e-DWDM ngokuvamile ibiza ngokuphindwe kane noma kahlanu kunaleyo yamamojula awo e-CWDM. Ngisho nezindleko zokusebenza ze-DWDM ziphezulu kune-CWDM. Ngakho-ke i-CWDM iyisinqumo esihle kulabo abanomkhawulo wokuthola imali.
2. Imfuneko Yamandla
Uma kuqhathaniswa ne-CWDM, izidingo zamandla e-DWDM ziphakeme kakhulu. Njengoba amalaser e-DWDM kanye ne-monitor ehambisanayo kanye nokujikeleza kokulawula kudla cishe u-4 W ngobude begagasi ngalinye. Ngaleso sikhathi, isidluliseli selaser esingapholisiwe se-CWDM sisebenzisa amandla angaba ngu-0.5 W. I-CWDM ubuchwepheshe bokungenzi lutho obungasebenzisi amandla kagesi. Inemiphumela emihle yezezimali kubaqhubi be-inthanethi.
3. Ukusebenza Okulula
Izinhlelo ze-CWDM zisebenzisa ubuchwepheshe obulula ngokuphathelene ne-DWDM. Isebenzisa i-LED noma i-Laser amandla. Izihlungi zamagagasi ezinhlelo ze-CWDM zincane futhi zishibhile. Ngakho kulula ukufakwa nokusetshenziswa.
Izinzuzo ze-DWDM:
1. Ukuthuthukiswa Okuguquguqukayo
I-DWDM iyaguquguquka futhi iqinile maqondana nezinhlobo zefiber. Ukuthuthukiswa kwe-DWDM kuya eziteshini eziyi-16 kuyasebenza kuzo zombili izintambo ze-G.652 ne-G.652.C. Ekuqaleni kusukela eqinisweni lokuthi i-DWDM ihlala isebenzisa indawo yokulahlekelwa okuphansi kwefayibha. Ngenkathi izinhlelo ze-CWDM zesiteshi eziyi-16 zibandakanya ukudluliselwa endaweni ye-1300-1400nm, lapho ukuncipha kuphakeme ngokumangalisayo.
2. Ukuqina
Izixazululo ze-DWDM zivumela ukuthuthukiswa ezinyathelweni zamashaneli ayisishiyagalombili kuze kufike eziteshini ezingu-40. Bavumela inani eliphakeme kakhulu eliphelele ku-fiber kunesisombululo se-CWDM.
3. Ibanga elide lokudlulisa
I-DWDM isebenzisa ibhendi ye-wavelength engu-1550 engakhuliswa kusetshenziswa izikhulisamazwi ezijwayelekile zokubona (EDFA's). Ithuthukisa ibanga lokudlulisela libe ngamakhulu amakhilomitha.
Isithombe esilandelayo sizokunikeza umbono obonakalayo womehluko phakathi kwe-CWDM ne-DWDM.
Isikhathi sokuthumela: Jun-14-2022