Nrog txoj kev loj hlob sai ntawm kev sib txuas lus thoob ntiaj teb, lub luag haujlwm ntawm kev sib txuas lus network tau dhau los ua qhov tseem ceeb. Tam sim no,DWDM technologytau siv dav hauv Network kev sib txuas lus tsim kho. DWDM thev naus laus zis zoo heev txhim kho kev sib kis tau ntawm Optical fiber Network.
1. Lub tswv yim
Dense Wavelength Division Multiplexing (DWDM) yog nyob rau hauv lub Wavelength ntawm 1550nm nyob ze ntawm lub qhov rais, nyob rau hauv lub EDFA muaj peev xwm muab ib tug nce ntau yam, kev sib txuas ntawm ntau yam optical nthwv dej nyob rau hauv ib pab pawg neeg ntawm optical wavelength nrog ib tug fiber ntau kis tau tus mob, yog ib tug fiber ntau caj qaum network los txhim kho. bandwidth ntawm laser technology. Xwb, cov txheej txheem multiplexes qhov nruj spectral sib nrug ntawm ib tug fiber ntau cab kuj nyob rau hauv ib tug muab fiber ntau coj kom zoo dua ntawm cov kis tau tus mob kev ua tau zoo (piv txwv li, yam tsawg kawg dispersion los yog attenuation). Nyob rau hauv txoj kev no, tag nrho cov nyiaj fiber ntau yuav tsum raug txo kom muaj peev xwm kis tau tus mob.
2. Hom teeb liab
DWDM thev naus laus zis tsis muaj cov qauv sib thooj. Nyob rau hauv cov txheej txheem ntawm kev ua haujlwm, lub wavelength ntawm ib lub teeb liab yog hloov mus rau qhov sib thooj wavelength nyob rau hauv kev sib txuas lus hauv network los ntawm lub converter, thiab cov kis tau tus mob wavelength yog reused los ntawm optical technology.
3. Kev sib txuas lus thiab kev tiv thaiv mechanism
DWDM technology network yog tsim los ntawm point-to-point, saw, hnub qub thiab nplhaib network. Hais txog hom kev tiv thaiv, tsuas yog kev tiv thaiv yooj yim yog muab. Nyob rau hauv cov nqe lus ntawm kev tiv thaiv hom, kev tiv thaiv hom yog tsuas yog lub teeb rov qab segment tiv thaiv, thiab 1 ntxiv 1 thiab 1: 1 kev tiv thaiv yog saws rau ntawm txoj kev kho qhov muag. Tsis muaj kev tiv thaiv rau cov khoom siv davhlau ya nyob twg, uas yuav tsum muaj ob txoj kab hluav taws xob kho qhov muag los ntawm nws tus kheej. DWDM txoj kev tiv thaiv tus kheej rau kev pabcuam yog ua tiav hauv SDH nplhaib network.
4. Daim ntawv thov scenarios
DWDM feem ntau yog siv rau hauv interprovincial backbone network thiab lub xeev qaum teb network. Nws tsuas yog siv lub point-to-point network hom kom paub txog kev tiv thaiv kab. Yog tias txoj kab kev tiv thaiv tau txais yuav, ntau kab yuav tsum tau muab tso rau thiab tus nqi siab. Yog li ntawd, tus kheej-kho tiv thaiv ntawmKev pabcuam DWDMyog nqa tawm ua ke nrog SDH nplhaib network thiab tau siv dav.
5. Qhov zoo
Lub yoj sib cais qhov system tuaj yeem ua rau kom muaj peev xwm hauv lub network thiab ua kom tag nrho cov khoom siv kho qhov muag. Qhov sib kis tus nqi ntawm ib lub wavelength yog 1.25Gbit / s rau 100Gbit / s, thiab tus naj npawb ntawm cov kev pab cuam yog mus txog 96 nthwv dej. Lub yoj sib cais yog tsim los ntawm wavelength conversion module, yoj sib cais module, MUX, DEMUX, fiber amplifier, dispersion compensator, network tswj chav tsev thiab lwm yam Cheebtsam, uas sib koom ua ke ua kom tiav cov kis tau tus mob, shaping thiab tau txais network signals thiab ua ib tug ruaj khov.DWDM kis tau tus mob system. Nws muaj cov yam ntxwv ntawm kev hloov pauv hauv lub network, muaj peev xwm nthuav dav, kev ruaj ntseg thiab kev ruaj ntseg, kev tswj hwm ntau yam thiab hloov tau yooj yim. Nws muaj kev paub txog kev ua tau zoo hauv kev siv cov pob txha caj qaum, cov neeg ua haujlwm hauv nroog, lub xeev daim phiaj, tub rog tshwj xeeb network, kev saib xyuas kev ruaj ntseg, kev kawm hauv tsev kawm qib siab thiab lwm yam haujlwm.
