Optical amplifier: nws muaj qhov ua kom pom tseeb ntawm cov teeb liab tawm suab hom thiab tus nqi ntsis. Nws ua haujlwm nyob hauv thaj tsam 1550 nm nrog qhov siab nce, qhov tso zis tawm hluav taws xob loj thiab lub suab qis qis. Raws li cov ntawv thov sib txawv, kho qhov muag tau pom muaj peb yam hauv qab no:
Lub Rooj Ua Haujlwm Txhaum Cai, BA
Cov Ua Ntej Ua Ntej, PA
Kab Amplifier, LA
Tam sim no, feem ntau ntawm cov qhov muag hluav taws xob feem ntau siv nyob rau hauv ntau lub tshuab hluav taws xob DWDM yog EDFA, uas feem ntau muaj cov txheej txheem fiber ntau erbium, doped fiber, lub twj tso kua mis laser thiab DWDM module. EDFA tuaj yeem ncaj qha mus rau cheeb tsam 1550 nm yam tsis muaj kev siv hluav taws xob tsim hluav taws xob, thiab tuaj yeem muab qhov nce tiaj tiaj hauv qhov muaj ntau ntawm yoj yoj yoj. Ntawd yog hais, ib qho EDFA tuaj yeem muab nce ntawm ntau txoj kab hluav taws xob thaum tib lub sijhawm, uas tau hloov feem ntau ntawm cov kev tsim kho tshiab thiab dhau los ua cov sib txuas ntawm cov kho qhov muag ntev fiber ntau.
DWDM cov davhlau ya nyob twg nrog optical amplifier tuaj yeem siv rau kev xa xov kho qhov muag. Ntawm kev sib kis ntawm qhov kawg, nws tuaj yeem lees txais cov teeb liab kho qhov muag ntawm ntau lub wavelengths thiab hloov nws mus rau hauv lub teeb liab kho qhov muag tau ua raws li ITU-T g.692 tsau wavelength. Tom qab multiplexer sib xyaw thiab kho qhov muag kom pom tseeb, nws kis tau mus rau lub network kho qhov muag. Thaum tau txais qhov kawg, lub teeb liab los ntawm kho qhov muag xa hluav taws xob tuaj yeem tau txais thiab tso tawm tom qab kho qhov muag tshwj xeeb, demultiplexer thiab lim kho qhov muag.
Muaj ob hom DWDM cov haujlwm:
(1) Qhib qhov system: feem ntau hu ua transponder raws DWDM, muaj cov hloov pauv ntau zaus ntawm cov khoom siv SDH thiab DWDM, uas tuaj yeem kho cov cuab yeej SDH los ntawm cov tuam txhab sib txawv.
(2) Cov kab ke sib xyaw: feem ntau hu ua passive DWDM, cov khoom siv SDH muaj qhov haujlwm ua haujlwm ntawm ITU-T g.692.
