Kwicandelo lonxibelelwano, uqhagamshelo lweziko ledatha, kunye nokuthuthwa kweevidiyo, ukuxhunywa kweentambo ze-fiber optic kuyathandeka kakhulu. Nangona kunjalo, inyani kukuba ukuxhunywa kweentambo ze-fiber optic akuseyondlela ingabizi kakhulu okanye enokwenzeka yokuyisebenzisa kwinkonzo nganye nganye. Ngoko ke ukusebenzisa i-Wavelength Division Multiplexing (WDM) ukwandisa amandla entambo kwiziseko zefayibha ezikhoyo kuyacetyiswa kakhulu. I-WDM yiteknoloji edibanisa imiqondiso emininzi ye-optical kwifayibha enye ngokusebenzisa ubude obahlukeneyo bokukhanya kwe-laser. Uphononongo olukhawulezileyo lweentsimi ze-WDM luya kufakwa kwi-CWDM kunye ne-DWDM. Zisekelwe kwingcamango efanayo yokusebenzisa ubude obahlukeneyo bokukhanya kwifayibha enye. Kodwa zombini zinezibonelelo kunye neentsilelo zazo.
Yintoni i-CWDM?
I-CWDM ixhasa ukuya kuthi ga kwiitshaneli ezili-18 zamaza ezithunyelwa ngefayibha ngaxeshanye. Ukuze kufezekiswe oku, amaza ahlukeneyo etshaneli nganye ahlukane ngama-20nm. I-DWDM, ixhasa ukuya kuthi ga kwiitshaneli ezingama-80 zamaza ngaxeshanye, apho itshaneli nganye ihlukane ngama-0.8nm kuphela. Itekhnoloji ye-CWDM inika isisombululo esilula nesingabizi kakhulu kwimigama emifutshane ukuya kuthi ga kwiikhilomitha ezingama-70. Kwimigama ephakathi kwama-40 nama-70 eekhilomitha, i-CWDM idla ngokukhawulelwa ekuxhaseni amatshaneli asibhozo.
Inkqubo ye-CWDM idla ngokuxhasa ubude be-wavelengths ezisibhozo ngefayibha nganye kwaye yenzelwe unxibelelwano olufutshane, isebenzisa amaza obubanzi kunye nobude be-wavelengths obusasazeke kude.
Ekubeni i-CWDM isekelwe kwisithuba seetshaneli ezingama-20-nm ukusuka kwi-1470 ukuya kwi-1610 nm, idla ngokusetyenziswa kwi-fiber spans ukuya kuthi ga kwi-80km okanye ngaphantsi kuba ii-optical amplifier azinakusetyenziswa kwiitshaneli ezinkulu zesithuba. Olu luhlu olubanzi lweetshaneli luvumela ukusetyenziswa kwee-optics ezixabiso liphantsi. Nangona kunjalo, amandla eekhonkco kunye nomgama oxhaswayo aphantsi kwi-CWDM kunakwi-DWDM.
Ngokubanzi, i-CWDM isetyenziselwa iindleko eziphantsi, amandla aphantsi (sub-10G) kunye nokusetyenziswa komgama omfutshane apho ixabiso liyinto ebalulekileyo.
Kutshanje, amaxabiso ezinto ze-CWDM kunye ne-DWDM aye athelekiseka ngokufanelekileyo. Amaza e-CWDM okwangoku anako ukuthutha ukuya kuthi ga kwi-10 Gigabit Ethernet kunye ne-16G Fiber Channel, kwaye akunakwenzeka ukuba lo mthamo unyuke ngakumbi kwixesha elizayo.
Yintoni i-DWDM?
Ngokungafaniyo ne-CWDM, uqhagamshelo lwe-DWDM lunokwandiswa kwaye, ke ngoko, lunokusetyenziselwa ukudlulisa idatha umgama omde kakhulu.
Kwiinkqubo ze-DWDM, inani leetshaneli eziphindaphindeneyo lixinene kakhulu kune-CWDM kuba i-DWDM isebenzisa isithuba esiqinileyo sobude bewavelength ukuze ifake iitshaneli ezininzi kwifayibha enye.
Endaweni yesithuba seetshaneli ezingama-20 nm esisetyenziswa kwi-CWDM (esilingana ne-15 yezigidi zeGHz), iinkqubo ze-DWDM zisebenzisa iintlobo ngeentlobo zesithuba seetshaneli ezichaziweyo ukusuka kwi-12.5 GHz ukuya kwi-200 GHz kwi-C-Band kwaye ngamanye amaxesha i-L-band.
Iinkqubo ze-DWDM zanamhlanje zihlala zixhasa iitshaneli ezingama-96 ezibekwe kwindawo eqelelene nge-0.8 nm ngaphakathi kwe-1550 nm C-Band spectrum. Ngenxa yesi sizathu, iinkqubo ze-DWDM zinokuthumela idatha eninzi ngekhonkco lefayibha enye njengoko zivumela ukuba amaza amaninzi ee-wavelength apakishwe kwifayibha efanayo.
I-DWDM ilungele unxibelelwano olufikelela kwi-long reach ukuya kuthi ga kwi-120 km nangaphezulu ngenxa yokukwazi kwayo ukusebenzisa ii-optical amplifiers, ezinokunyusa ngexabiso eliphantsi lonke i-1550 nm okanye i-C-band spectrum esetyenziswa rhoqo kwizicelo ze-DWDM. Oku kuyoyisa ixesha elide lokunciphisa okanye umgama kwaye xa ixhaswa yi-Erbium Doped-Fiber Amplifiers (EDFAs), iinkqubo ze-DWDM zinamandla okuthwala idatha eninzi kumgama omde ofikelela kumakhulu okanye amawaka eekhilomitha.
Ukongeza kubuchule bokuxhasa inani elikhulu lee-wavelengths kune-CWDM, amaqonga e-DWDM akwanakho ukusingatha iinkqubo zesantya esiphezulu njengoko uninzi lwabathengisi bezixhobo zothutho lwe-optical namhlanje luhlala luxhasa i-100G okanye i-200G ngobude bobude ngelixa ubuchwepheshe obutsha buvumela i-400G nangaphezulu.
I-DWDM vs CWDM wavelength spectrum:
I-CWDM inesithuba esibanzi setshaneli kune-DWDM -- umahluko oqhelekileyo kwi-frequency okanye kwi-wavelength phakathi kwetshaneli ezimbini ze-optical ezikufutshane.
Iinkqubo zeCWDM zihlala zithutha ubude obusibhozo bemitha kunye nesithuba se-channel esingu-20 nm kwigridi ye-spectrum ukusuka kwi-1470 nm ukuya kwi-1610 nm.
Iinkqubo ze-DWDM, kwelinye icala, zinokuthwala ubude be-40, 80, 96 okanye ukuya kuthi ga kwi-160 ngokusebenzisa isithuba esincinci kakhulu se-0.8/0.4 nm (100 GHz/50 GHz grid). Ububanzi be-DWDM buqhele ukuba phakathi kwe-1525 nm ukuya kwi-1565 nm (C-band), kwaye ezinye iinkqubo zikwazi ukusebenzisa ubude be-1570 nm ukuya kwi-1610 nm (L-band).
Iingenelo ze-CWDM:
1. Ixabiso eliphantsi
I-CWDM ibiza kancinci kune-DWDM ngenxa yeendleko zehardware. Inkqubo ye-CWDM isebenzisa ii-laser ezipholileyo ezibiza kancinci kunee-laser ezingapholiswanga ze-DWDM. Ukongeza, ixabiso lee-transceivers ze-DWDM lidla ngokubiza ngokuphindwe kane okanye kahlanu kuneemodyuli zazo ze-CWDM. Neendleko zokusebenza ze-DWDM ziphezulu kune-CWDM. Ngoko ke i-CWDM lukhetho olufanelekileyo kwabo banemida kwinkxaso-mali.
2. Imfuneko yamandla
Xa kuthelekiswa ne-CWDM, iimfuno zamandla ze-DWDM ziphezulu kakhulu. Njengoko iilaser ze-DWDM kunye ne-monitor kunye ne-control circuitry ezihambelanayo zisebenzisa malunga ne-4 W ngobude be-wavelength. Okwangoku, i-CWDM laser transmitter engapholiyo isebenzisa malunga ne-0.5 W yamandla. I-CWDM yiteknoloji engasebenziyo engasebenzisi mandla ombane. Inefuthe elihle kwezemali kubaqhubi be-intanethi.
3. Ukusebenza okulula
Iinkqubo ze-CWDM zisebenzisa itekhnoloji elula xa kuthelekiswa ne-DWDM. Isebenzisa i-LED okanye i-Laser ukuze ibe namandla. Iifilitha zamaza zeenkqubo ze-CWDM zincinci kwaye zingabizi kakhulu. Ngoko ke kulula ukuzifakela nokuzisebenzisa.
Iingenelo ze-DWDM:
1. Uphuculo oluguquguqukayo
I-DWDM iguquguquka kwaye yomelele ngokubhekiselele kwiintlobo zefayibha. Ukuphuculwa kwe-DWDM ukuya kwiitshaneli ezili-16 kuyasebenza kuzo zombini iifayibha ze-G.652 kunye ne-G.652.C. Ekuqaleni kungenxa yokuba i-DWDM ihlala isebenzisa ummandla welahleko ephantsi yefayibha. Ngelixa iinkqubo ze-CWDM zetshaneli ezili-16 zibandakanya ukudluliselwa kummandla we-1300-1400nm, apho ukuncitshiswa kuphezulu kakhulu.
2. Ukwanda kobunzima
Izisombululo ze-DWDM zivumela ukuphuculwa ngamanyathelo eetshaneli ezisibhozo ukuya kutsho kwiitshaneli ezingama-40. Zivumela umthamo opheleleyo ophezulu kakhulu kwifayibha kunesisombululo se-CWDM.
3. Umgama omde woThumelo
I-DWDM isebenzisa ibhendi ye-wavelength eyi-1550 enokwandiswa kusetyenziswa ii-optical amplifiers eziqhelekileyo (ii-EDFA). Iphucula umgama wokudlulisela ukuya kumakhulu eekhilomitha.
Lo mfanekiso ulandelayo uza kukunika umbono obonakalayo womahluko phakathi kwe-CWDM kunye ne-DWDM.
Ixesha lokuthumela: Juni-14-2022