Dab tsi yogEDFA?
Erbium-doped fiber ntau amplifier (EDFA) yog ib qho khoom siv kho qhov muag rov ua dua tshiab uas yog siv los txhawb qhov kev siv ntawm cov teeb liab kho qhov muag tau nqa los ntawm kev sib txuas lus fiber ntau optic. Ib qho fiber ntau optical yog doped nrog lub ntiaj teb tsis tshua muaj caij erbium kom cov iav fiber ntau tuaj yeem nqus lub teeb ntawm ib zaus thiab tawm lub teeb ntawm lwm zaus.
EDFA txoj cai ua haujlwm
Baisc configuration ntawm EDFA
EDFA kev teeb tsa feem ntau yog tsim los ntawm EDF, lub twj tso kua mis laser, thiab cov khoom siv (feem ntau hu ua WDM) rau kev sib txuas cov teeb liab thiab lub twj tso kua mis wavelength kom lawv tuaj yeem nthuav tawm ib txhij los ntawm EDF. Raws li txoj cai, EDFAs tuaj yeem tsim tau xws li lub zog twj tso kua mis propagates nyob rau hauv tib txoj kev raws li lub teeb liab (mus rau pem hauv ntej), lub opposite kev taw qhia rau lub teeb liab (rov qab mus), los yog ob qho tib si kev taw qhia ua ke. Lub twj tso kua mis lub zog yuav yog 980 nm lub zog twj tso kua mis, 1480 nm lub zog twj tso kua mis, lossis ob qho tib si ua ke. Xyaum, feem ntau EDFA configuration yog rau pem hauv ntej twj tso kua mis configuration siv 980 nm twj zog.
EDFA configuration nrog 980 nm twj zog
Kev siv EDFA
Tom qab kawm txog dab tsi yog EDFA, thiab EDFA txoj haujlwm ua haujlwm. Tom ntej no, peb' yuav tham txog daim ntawv thov kev pab thiab daim ntawv thov teb ntawm EDFA.
Daim ntawv thov
Booster Amplifier
Thaum siv los ua lub zog amplifier, EDFA tau muab tso rau hauv qhov tso zis ntawm optical transmitter los txhim kho qhov tso zis hluav taws xob ntawm cov teeb liab ntau wavelength tau multiplexed, raws li qhia hauv daim duab 3. Nyob rau hauv txoj kev no, qhov deb ntawm kev sib txuas lus kho qhov muag yuav txuas ntxiv mus. . Daim ntawv thov no muab qhov kev thov ntawm cov zis ntau dua ntawm EDFA.
Preamplifier
Thaum siv los ua lub preamplifier, EDFA xav tau cov yam ntxwv ntawm lub suab qis thiab nce siab. Tau nruab nrog cov yam ntxwv no, EDFA tuaj yeem txhim kho qhov rhiab heev ntawm qhov chaw txais khoom siv kho qhov muag thaum muab tso rau hauv cov tswv yim ntawm cov khoom siv kho qhov muag, raws li pom hauv daim duab 4.
Kab Amplifier
Thaum siv los ua cov kab amplifier, EDFA muaj peev xwm them nyiaj rau qhov kev sib kis ntawm kab. Raws li ib qho kev hloov pauv rau OEO repeater, EDFA tuaj yeem ncaj qha nthuav dav cov teeb liab kho qhov muag xa mus rau hauv kab. Nyob rau hauv txoj kev no, peb daws cov teeb meem hauv lub fwj ntawm kev hloov pauv photoelectric los teeb lub hauv paus rau txhua qhov kev kho qhov muag (AON).
Cov kab amplifier
Cov teb ntawm daim ntawv thov
EDFA muaj cov ntawv thov hauv qab no:
(1) EDFA tuaj yeem ua haujlwm nyob rau hauv qhov muaj peev xwm thiab kev sib txuas lus siab ceev. Daim ntawv thov ntawm EDFA yog qhov tsim nyog heev los daws cov teeb meem ntawm qhov tsis tshua muaj siab ntawm cov neeg txais thiab kev sib kis luv luv vim tsis muaj OEO repeater.
(2) EDFA tuaj yeem siv rau hauv kev sib txuas lus kho qhov muag ntev. Los ntawm kev siv EDFA, peb tuaj yeem txo qis kev tsim kho tus nqi los ntawm kev ua kom qhov sib txawv ntawm qhov sib txawv kom txo tau qhov ntau ntawm cov regenerative repeaters. Qhov ntev-ntev kho qhov muag kev sib txuas lus system feem ntau suav nrog thaj av pob tw optical kis tau tus mob thiab submarine optical fiber cable kis tau tus mob.
(3) EDFA tuaj yeem siv rau hauv cov khoom siv kho qhov muag fiber ntau nkag mus rau lub network. Yog tias qhov kev sib kis tau ntev dhau lawm, EDFA yuav ua haujlwm raws li cov kab hluav taws xob kom them nyiaj rau kev xa cov kab poob, yog li ua rau cov neeg siv khoom nce ntxiv.
(4) EDFA tuaj yeem ua haujlwm hauv wavelength-division multiplexing (WDM) system, tshwj xeeb tshaj yog ntom wavelength-division multiplexing (DWDM) system. Kev siv EDFA hauv WDM system muaj peev xwm daws tau cov teeb meem ntawm qhov poob thiab txo qhov cuam tshuam ntawm chromatic dispersion.
(5) EDFA tuaj yeem siv rau hauv zej zog kav hlau txais xov TV (CATV) system. Hauv CATV system, EDFA ua haujlwm raws li lub zog amplifier txhawm rau txhim kho lub zog tawm tswv yim ntawm cov khoom siv kho qhov muag. Kev siv EDFA los them nyiaj rau qhov poob ntawm cov khoom siv hluav taws xob kho qhov muag tuaj yeem ua kom cov nplai ntawm lub network faib thiab nce cov neeg siv khoom.
Ntawm ntau yam thev naus laus zis muaj rau optical amplifiers, EDFA thev naus laus zis yog nyob deb tshaj plaws. Niaj hnub no EDFA yog dav siv hauv kev sib txuas lus fiber ntau. Raws li kev sib txuas lus thev naus laus zis txuas ntxiv tsim, EDFA yuav dhau los ua qhov kev xaiv zoo tshaj plaws rau lub tshuab hluav taws xob kho qhov muag yav tom ntej. Tau nruab nrog cov yam ntxwv ntawm lub tiaj tus nce siab tshaj qhov loj dynamic nce ntau, tsis tshua muaj suab nrov, siab saturation tso zis zog thiab ruaj khov ua hauj lwm nrog rau yav dhau los suppression, EDFA yuav ua si ib tug ntau thiab ntau tseem ceeb luag hauj lwm nyob rau hauv kho qhov muag kev sib txuas lus system kom zoo dua pab neeg.
HTFqhov zoo dua yog DWDM EDFA, peb tsim kev hloov pauv kev daws teeb meem rau ntau lub tebchaws thoob ntiaj teb. Peb siv EDFA nyob rau hauv kev hloov mus ntev heev los pab cov neeg siv los daws lawv cov teeb meem hauv kev lag luam.
