Emkhakheni wezokuxhumana ngocingo, ukuxhumana kwesikhungo sedatha, kanye nokuthuthwa kwevidiyo, ukuxhumanisa izintambo ze-fiber optic kuyathandeka kakhulu. Kodwa-ke, iqiniso liwukuthi ukuxhumanisa izintambo ze-fiber optic akuseyona inketho engabizi noma engenzeka yokuyisebenzisa kusevisi ngayinye. Ngakho-ke ukusebenzisa i-Wavelength Division Multiplexing (WDM) yokwandisa umthamo wentambo engqalasizinda yentambo ekhona kuyalulekwa kakhulu. I-WDM ubuchwepheshe obuhlanganisa izimpawu eziningi ze-optical kuntambo eyodwa ngokusebenzisa ubude obuhlukene bokukhanya kwe-laser. Ucwaningo olusheshayo lwezinkambu ze-WDM luzofakwa ku-CWDM kanye ne-DWDM. Zisekelwe emqondweni ofanayo wokusebenzisa ubude obuhlukahlukene bokukhanya kuntambo eyodwa. Kodwa zombili zinezinzuzo kanye nokungalungi kwazo.
Kuyini i-CWDM?
I-CWDM isekela iziteshi zobude obufinyelela ku-18 ezidluliselwa ngefayibha ngesikhathi esisodwa. Ukuze kufezwe lokhu, ubude obuhlukene beziteshi zesiteshi ngasinye buqhelelene ngama-20nm. I-DWDM, isekela iziteshi zobude obufinyelela ku-80 ngesikhathi esisodwa, kanti isiteshi ngasinye siqhelelene ngama-0.8nm kuphela. Ubuchwepheshe be-CWDM bunikeza ikhambi elilula nelingabizi kakhulu lamabanga amafushane afinyelela kumakhilomitha angu-70. Emabanga aphakathi kwamakhilomitha angu-40 nama-70, i-CWDM ivame ukukhawulelwa ekusekeleni iziteshi eziyisishiyagalombili.
Uhlelo lwe-CWDM luvame ukusekela amaza obubanzi ayisishiyagalombili ngefayibha ngayinye futhi lwenzelwe ukuxhumana kwebanga elifushane, kusetshenziswa amaza obubanzi anamaza obubanzi asakazeke kude.
Njengoba i-CWDM isekelwe esikhaleni seziteshi ezingama-20-nm kusukela ku-1470 kuya ku-1610 nm, ivame ukusetshenziswa kuma-fiber spans afinyelela ku-80km noma ngaphansi ngoba ama-optical amplifier awakwazi ukusetshenziswa neziteshi ezinkulu zesikhala. Lesi sikhala esibanzi seziteshi sivumela ukusetshenziswa kwama-optics anentengo ephakathi. Kodwa-ke, amandla ezixhumanisi kanye nebanga elisekelwayo lincane nge-CWDM kune-DWDM.
Ngokuvamile, i-CWDM isetshenziselwa izindleko eziphansi, amandla aphansi (sub-10G) kanye nezinhlelo zokusebenza zebanga elifushane lapho izindleko ziyisici esibalulekile.
Muva nje, amanani ezingxenye ze-CWDM kanye ne-DWDM aseqhathaniseke ngokufanele. Amaza obubanzi be-CWDM okwamanje ayakwazi ukuthutha kufikela ku-10 Gigabit Ethernet kanye ne-16G Fiber Channel, futhi akunakwenzeka ukuthi leli khono likhule kakhulu esikhathini esizayo.
Kuyini i-DWDM?
Ngokungafani ne-CWDM, ukuxhumana kwe-DWDM kungandiswa futhi ngakho-ke, kungasetshenziswa ekudluliseni idatha amabanga amade kakhulu.
Ezinhlelweni ze-DWDM, inani leziteshi ezihlanganisiwe lincane kakhulu kune-CWDM ngoba i-DWDM isebenzisa isikhala esiqinile sobude bewavelength ukuze ifake iziteshi eziningi ku-fiber eyodwa.
Esikhundleni sesikhala sesiteshi esingu-20 nm esisetshenziswa ku-CWDM (esilingana cishe ne-GHz eyizigidi ezingu-15), izinhlelo ze-DWDM zisebenzisa izikhala zeziteshi ezahlukahlukene ezicacisiwe kusukela ku-12.5 GHz kuya ku-200 GHz ku-C-Band futhi ngezinye izikhathi i-L-band.
Izinhlelo ze-DWDM zanamuhla zivame ukusekela iziteshi ezingu-96 ezihlukaniswe ngo-0.8 nm ngaphakathi kwe-spectrum ye-C-Band engu-1550 nm. Ngenxa yalokhu, izinhlelo ze-DWDM zingadlulisela inani elikhulu ledatha ngesixhumanisi sefayibha eyodwa njengoba zivumela ukuthi amaza amaningi e-wavelength afakwe kufayibha efanayo.
I-DWDM ilungele ukuxhumana okude okufika kumakhilomitha ayi-120 nangaphezulu ngenxa yekhono layo lokusebenzisa ama-amplifiers e-optical, angakhulisa ngezindleko yonke i-spectrum engu-1550 nm noma i-C-band evame ukusetshenziswa kuzinhlelo zokusebenza ze-DWDM. Lokhu kunqoba izikhathi ezinde zokunciphisa noma ibanga futhi uma kuthuthukiswa yi-Erbium Doped-Fiber Amplifiers (EDFAs), izinhlelo ze-DWDM zinamandla okuphatha inani elikhulu ledatha kumabanga amade afinyelela kumakhulu noma izinkulungwane zamakhilomitha.
Ngaphezu kwamandla okusekela inani elikhulu lama-wavelength kune-CWDM, amapulatifomu e-DWDM nawo ayakwazi ukuphatha izinqubo zesivinini esiphezulu njengoba abathengisi abaningi bemishini yokuthutha ye-optical namuhla bavame ukusekela i-100G noma i-200G ngobude be-wavelength kuyilapho ubuchwepheshe obusha buvumela i-400G nangaphezulu.
I-spectrum ye-wavelength ye-DWDM vs CWDM:
I-CWDM inesikhala esikhulu sesiteshi kune-DWDM -- umehluko ojwayelekile ku-frequency noma ubude be-wavelength phakathi kweziteshi ezimbili eziseduze ze-optical.
Izinhlelo ze-CWDM zivame ukuthutha amaza obubanzi ayisishiyagalombili anesikhala sesiteshi esingu-20 nm kugridi ye-spectrum kusukela ku-1470 nm kuya ku-1610 nm.
Ngakolunye uhlangothi, izinhlelo ze-DWDM zingathwala ubude obungu-40, 80, 96 noma kuze kufike ku-160 ngokusebenzisa isikhala esincane kakhulu esingu-0.8/0.4 nm (igridi engu-100 GHz/50 GHz). Ubude obungu-DWDM buvame ukuba phakathi kuka-1525 nm no-1565 nm (ibhendi le-C), kanti ezinye izinhlelo nazo ziyakwazi ukusebenzisa ubude obungu-1570 nm no-1610 nm (ibhendi le-L).
Izinzuzo ze-CWDM:
1. Izindleko Eziphansi
I-CWDM ishibhile kakhulu kune-DWDM ngenxa yezindleko zehadiwe. Uhlelo lwe-CWDM lusebenzisa ama-laser apholile ashibhile kakhulu kune-DWDM engapholile. Ngaphezu kwalokho, intengo yama-transceivers e-DWDM ivame ukubiza ngokuphindwe kane noma kahlanu kuneyamamojula awo e-CWDM. Ngisho nezindleko zokusebenza ze-DWDM ziphakeme kune-CWDM. Ngakho-ke i-CWDM iyisinqumo esifanele kulabo abanomkhawulo ekuxhaseni ngezimali.
2. Isidingo Samandla
Uma kuqhathaniswa ne-CWDM, izidingo zamandla ze-DWDM ziphakeme kakhulu. Njengoba ama-laser e-DWDM kanye ne-monitor kanye ne-control circuitry ehambisanayo adla cishe ama-4 W ngobude be-wavelength. Okwamanje, i-CWDM laser transmitter engapholi isebenzisa cishe ama-0.5 W wamandla. I-CWDM ubuchwepheshe obungasebenzisi amandla kagesi. Bunemiphumela emihle kwezezimali kubasebenzisi be-inthanethi.
3. Ukusebenza okulula
Izinhlelo ze-CWDM zisebenzisa ubuchwepheshe obulula maqondana ne-DWDM. Zisebenzisa i-LED noma i-Laser ukuze zisebenze. Izihlungi zamagagasi zezinhlelo ze-CWDM zincane futhi zishibhile. Ngakho-ke kulula ukuzifaka nokuzisebenzisa.
Izinzuzo ze-DWDM:
1. Ukuthuthukiswa Okuguquguqukayo
I-DWDM iyaguquguquka futhi iqinile maqondana nezinhlobo zefayibha. Ukuthuthukiswa kwe-DWDM kube iziteshi ezingu-16 kuyasebenza kuzo zombili izintambo ze-G.652 kanye ne-G.652.C. Kwaqala ngenxa yokuthi i-DWDM ihlala isebenzisa indawo yokulahlekelwa okuphansi kwefayibha. Ngenkathi izinhlelo ze-CWDM zeziteshi ezingu-16 zihilela ukudluliselwa esifundeni esingu-1300-1400nm, lapho ukuncishiswa kuphakeme khona ngokumangalisayo.
2. Ukusabalala
Izixazululo ze-DWDM zivumela ukuthuthukiswa ngezinyathelo zeziteshi eziyisishiyagalombili kuze kufike kuziteshi ezingama-40. Zivumela umthamo ophelele ophezulu kakhulu ku-fiber kunesixazululo se-CWDM.
3. Ibanga Elide Lokudlulisela
I-DWDM isebenzisa ibhendi yamaza angu-1550 engakhuliswa kusetshenziswa ama-amplifier avamile e-optical (EDFA). Ithuthukisa ibanga lokudlulisela libe amakhulu amakhilomitha.
Isithombe esilandelayo sizokunikeza umbono obonakalayo womehluko phakathi kwe-CWDM ne-DWDM.
Isikhathi sokuthunyelwe: Juni-14-2022