Optical Amplifier - EDFA (Erbium-doped Fiber Amplifier) rau WDM System
Optical amplifiers pab ua ib feem ntawm kev xa cov ntaub ntawv ntev ntev. Qhov feem ntau mas feature ntawm optical amplifier yog tias tus ntaus tau ua kom nrov loj qhov teeb liab uas tsis muaj qhov xav tau los hloov lub teeb liab rau hauv ib qho hluav taws xob ua ntej kev ua kom nrov zog. EDFA (Erbium-doped Fiber Amplifier) yog ib hom ntau ntau yam khoom siv kho tshuab hluav taws xob uas muaj peev xwm ua tiav cov teeb meem kev ua haujlwm ntawm kev sib txuas lus ntev-hual.
Optical Amplifier Nqis
Thaum kis tau ntev ntev, qhov teeb meem kho qhov muag pom tau tias muaj ntau lub sij hawm nyob nruab nrab ntawm kev tshuav ntawm qhov teeb meem ntawm cov roj teeb, kev poob kev sib txuas, kev lag luam poob, thiab lwm yam. hluav taws xob teeb liab, nrov, thiab hloov dua siab tshiab rov qab mus rau qhov teeb meem kho qhov muag dua. Tus txheej txheem yog cov nyuab heev thiab kim heev. Optical amplifier lawm txij li tau tsim los uas ua kom nrov tau cov teeb meem ncaj qha, txoj kev no yog pheej yig dua thiab pib ua haujlwm ntawm fiber ntau optic. Muaj peb hom fiber ntau hom phom: EDFA, Raman amplifier thiab semiconductor optical amplifier (SOA).
EDFA Amplifier Yog Dab Tsi?
EDFA, los yog Erbium-doped Fiber Amplifier, yog feem ntau deployed optical amplifier nyob rau hauv WDM system uas siv cov Erbium-doped fiber li optical amplification nruab nrab kom ncaj qha txhim kho cov teeb liab. Qhov nruab nrab nruab nrab yog lub iav fiber ntau qhov doped nrog erbium ions. Cov erbium-doped fiber ntau qhov nruab nrab ua kom pom lub teeb ntawm wavelengths uas yog nyob rau hauv lub zej zog ntawm 1550 nm - lub qhov muag optical wavelengths uas raug kev txom nyem yam tsawg kawg attenuation nyob rau hauv optical fibers. EDFA ua haujlwm zoo tshaj plaws nyob rau hauv qhov ntau txog 1530 txog 1565 nm, thiab nws muaj suab nrov qis thiab tuaj yeem ua kom nrov muaj ntau lub wavelengths ib txhij, ua qhov fiber ntau amplifier xaiv rau feem ntau cov kev siv hauv kev sib txuas lus kho qhov muag.
Peb EDFA Amplifier Hom Rau DWDM Connectivity
Raws li lub luag haujlwm, EDFA tuaj yeem faib ua peb hom: tus neeg txhawb zog, tus neeg ua haujlwm rau hauv amplifier thiab kev hloov ua ntej.
Txheej Txheem Amplifier
Ib qho tshuaj tivthaiv kabmob ua haujlwm ntawm kev sib kis ntawm qhov txuas, tsim los ua kom nrov loj ntawm cov teeb liab ntawm kev tawm lub transmitter mus rau theem tsim nyog rau kev xa mus rau hauv qhov txuas txuas. Nws tsis yog ib txwm xav tau nyob rau hauv tib qho kev sib txuas hauv channel, tab sis yog qhov tseem ceeb hauv DWDM txuas qhov chaw uas tus zauv siv zis los ntawm cov teeb liab. Nws muaj cov lus qhia siab siab, siab tso zis zog thiab nruab nrab qhov nruab nrab qhov siab. Cov hom yog 20dBm Cov Zis C-Qhauj 40 Raws Raws li 26dB Ncaws Qib EDFA, 16dBm Cov Zis C-Band 40 Raws 14dB Tau Txais Daws EDFA thiab lwm yam.
In-kab Amplifier
Tus txheej txheem nyob rau hauv kab yog feem ntau ntawm cov ntsiab lus sib txuas raws kis txuas rau hauv DWDM txuas mus kov yeej fiber ntau kis kab mob thiab lwm yam kev poob haujlwm. Optical kab amplifier tsim rau optical amplification ntawm ob lub network ntshav ntawm lub ntsiab qhov muag kho qhov muag. In-line amplifiers raug muab tso rau txhua txhua 80-100 km kom paub meej tias lub teeb liab qhov muag seem nyob saum lub suab nrov pem teb. Nws ntim nruab nrab kom qis zog, lub zog tso zis siab, siab kho qhov muag, thiab lub suab qis nrov.
Pre-amplifier
Lub pre-amplifier hauj lwm ntawm qhov tau txais qhov kawg ntawm DWDM txuas. Ua ntej siv tus txheej txheem (amplifier) yog siv los txhawb kom muaj kev piam sij hauv lub demultiplexer ze qhov chaw txais suab paj nruag. Tso tawm ua ntej tus receiver kawg ntawm qhov DWDM txuas, ua ntej-amplifier ua haujlwm los txhim khu lub teeb liab ua ntej kev yees duab kom paub tias yuav siv qhov chaw nyob rau hauv lub xuab zeb ultra-ntev, li no txhim kho cov kev xav tau. Nws kuj tsis tshua tawm tswv yim, lub zog tso zis nruab nrab thiab nruab nrab qhov nce.
EDFA Ua Haujlwm Li Cas?
Yeej, EDFA muaj lub sijhawm ntev npaum li EDF (Erbium doped fiber), lub twj tso kua mis laser, thiab WDM combiner. WDM combiner yog kev sib txuas ntawm lub teeb liab thiab cov twj pliaj wavelength, yog li ntawd lawv tuaj yeem propagate ib txhij los ntawm EDF. Cov duab hauv qab qhia tau hais tias muaj ntau dua daim duab ntawm EDFA.
Qhov teeb meem kho qhov muag, xws li 1550nm teeb liab, nkag mus hauv EDFA amplifier los ntawm lub tswv yim. Lub teeb xaim 1550nm yog nrog lub 980nm twj laser nrog WDM. Lub teeb liab thiab lub twj tso kua mis laser kis tau los ntawm ib qhov ntev ntawm fiber ntau doped nrog Erbium ions. Lub teeb meem ntawm 1550nm yog ntxiv rau kev sib txuas nrog cov doping Erbium ions. Qhov kev txiav txim no ua rau lub zog qis qis rau lub hwj chim ntau dua, ua rau lub zog nyob hauv lub teeb liab.
Vim li cas EDFA Fiber Amplifier tseem ceeb rau DWDM?
Niaj hnub no, EDFA optical amplifier nce mus rau qhov kev xaiv qhov kev tsim kho rau cov teebmeem ua kom muaj teeb meem rau DWDM, vim nws tsis tshua suab nrov thiab tsis hnov cov teeb meem kev kos duab. Dhau li ntawm, EDFA cov khoom xa los kuj yooj yim dua thiab kom pheej yig dua piv nrog lwm cov teebmeem kev ua haujlwm.
Zoo Tshaj Plaws
EDFAs tau siv cov twj siv hluav taws xob siab (> 50%) Ncav ncaj thiab sim ib qho ua kom nrov ntau tshaj plaws (> 80nm) hauv cheeb tsam 1550 nm, nrog rau ib qho kev nce tiaj. Flatness tuaj yeem khees me ntsis ntxiv los ntawm qhov nce-flattening optical lim. Tsam tau dhau ntawm 50 dB. Tsawg suab nrov tsis tsim nyog rau kev siv ntev ntev.
FOCC DWDM EDFA Amplifiers
FOCC DWDM EDFA fibre amplifier yog lub suab qes, nce-flattened C-band optical erbium doped fiber amplifier tsim kom pom qhov kev ncua deb ntawm DWDM optical infrastructure. Nws muab cov neeg tuaj yeem tsim nyog mus cuag txog 40 raws, 2.5Gbps, lossis 10Gbps optical infrastructure ntau dua. FS muab peb hom DWDM EDFAs-Booster Amplifier, In-line Amplifier, Pre-amplifier nrog ntau yam kev tso zis xaiv (12dBm-35dBm).
Dhau li ntawm EDFA, Multi-Service Thauj (FMT) system kuj muaj lwm yam khoom siv xws li OEO, DCM thiab OLP los tsim kom muaj kev sib koom tes DWDM ntev ua ke. Tsis tas li ntawd, peb yuav tsim tus qauv tsim txhua tus neeg muaj kev haumxeeb TXHAUM rau cov kev xav tau.
