Passive DWDM System vs Active DWDM System
Dense wavelength division multiplexing (DWDM) yog lub tshuab hluav taws xob wavelength division multiplexing (WDM) uas nthuav dav kev sib kis ntawm cov fiber ntau optical network uas twb muaj lawm. Txuag ntau cov peev txheej fiber ntau hauv cov ntawv thov kev sib kis.Tam sim no muaj ob lub ntsiab ntawm DWDM systems: passive DWDM systems thiab nquag DWDM systems.
Passive DWDM System
Cov khoom nquag xws li fiber ntau amplifiers thiab dispersion compensators tsis siv nyob rau hauv passive DWDM systems. Qhov kev ncua deb ntawm cov kab ke no yuav raug txwv los ntawm kev xa xov hluav taws xob ntawm cov khoom siv kho qhov muag, tab sis nws muaj qhov zoo ntawm cov channel muaj peev xwm thiab feem ntau yog siv hauv cov cheeb tsam hauv nroog thiab cov channel muaj peev xwm hauv high-speed kis kab.
Active DWDM system
Active DWDM yog ib qho system uas suav nrog cov transponders ua qhov kev hloov kho qhov muag-hluav taws xob-kho qhov muag (OEO).Tsis tas li ntawd, muaj ntau yam erbium-doped fiber ntau amplifiers (EDFA) nyob rau hauv lub kaw lus kom ntseeg tau tias qhov kawg tau txais yuav tau txais qhov zoo tshaj plaws optical signals, tab sis tus naj npawb ntawm erbium-doped fiber amplifiers (EDFA) yuav raug cuam tshuam los ntawm hom fiber ntau. , tus naj npawb ntawm wavelength channels, Transmission rate, signal-to-noise ratio (OSNR) thiab lwm yam.
Qhov txuas ntev ntawm ib qho kev ua haujlwm DWDM tsis yog tsuas yog cuam tshuam nrog cov xov tooj ntawm fiber ntau amplifiers thiab lub teeb liab-rau-suab nrov piv (OSNR), tab sis kuj mus rau dispersion ntawm lub teeb liab optical.Yog li ntawd, thaum tsim ib tug active DWDM system, qhov dispersion ntawm optical teeb liab yuav tsum tau muab coj mus rau hauv tus account. Yog tias tsim nyog, lub dispersion compensator (DCM) tuaj yeem muab ntxiv rau hauv DWDM system. Nws yuav tsum tau muab sau tseg hais tias lub dispersion compensator (DCM) Nws yuav ua rau kom cov insertion poob ntawm qhov kho qhov muag fiber txuas, thiab tseem yuav cuam tshuam qhov kev ncua deb ntawm lub active DWDM system.
Passive DWDM System vs Active DWDM System
Passive DWDM systems thiab nquag DWDM systems muaj lawv tus kheej qhov zoo thiab qhov tsis zoo, uas yuav qhia meej hauv tshooj no.
Pros thiab Cons ntawm Passive DWDM Systems
Kev txuag nqi: Piv nrog cov nquag DWDM nraub qaum nruab nrog fiber ntau amplifiers thiab dispersion compensators, passive DWDM tuaj yeem tsim cov kab sib kis tau zoo nrog lub peev xwm siab ntawm tus nqi qis.
Yooj yim rau siv: Passive DWDM yog lub kaw lus ntsaws thiab ua si uas yooj yim thiab siv tau yooj yim.
Txawm li cas los xij, passive DWDM systems kuj muaj qhov tsis txaus hauv cov hauv qab no:
Scalability: Tus naj npawb ntawm wavelength channel nyob rau hauv passive DWDM systems yog txwv. Yog tias koj xav nthuav lub network, koj yuav tsum siv ntau cov khoom siv DWDM passive, uas yuav ua rau muaj kev nyuaj ntawm kev tswj hwm.
Qhov zoo thiab qhov tsis zoo ntawm Active DWDM Systems
Active DWDM systems txhawb nqa ntau lub wavelength channels, uas ua rau muaj bandwidth ntau dua thiab siv fiber ntau dua.Tsis tas li ntawd, lub active DWDM system yog yooj yim dua los tswj, cov neeg siv tau kho cov channel wavelength hauv internet yam tsis tau kaw lub kaw lus, thiab expansion ntawm lub nquag DWDM system yog yooj yim dua.
Piv nrog rau cov kab ke DWDM passive, cov kab ke DWDM nquag muaj qhov sib kis tau ntev dua thiab cov nqi xa mus ntau dua.Tsis tas li ntawd, cov tshuab DWDM nquag siv kuj tseem siv cov khoom siv kho qhov muag fiber ntau, dispersion compensators thiab lwm yam khoom siv, thiab lawv cov kev xa tawm nyuaj dua li cov kab ke DWDM tsis zoo.
xaus lus
Passive DWDM systems thiab active DWDM systems muaj lawv tus kheej zoo, thiab peb yuav tsum xa DWDM systems raws li ib tug tshwj xeeb daim ntawv thov.Tsis muaj teeb meem dab tsi ntawm cov kab ke saum toj no raug xa mus, DWDM multiplexer / demultiplexer yog qhov tseem ceeb.
