Wavelength Division Multiplexer txoj cai ua haujlwm

Wavelength Division Multiplexing (WDM) yog ib lub tshuab uas xa ntau lub wavelengths ntawm optical signals ib txhij nyob rau hauv ib lub fiber ntau. Piv nrog rau ib lub wavelength technology, WDM tuaj yeem txuag tau cov khoom siv fiber ntau. Lub hauv paus ntsiab lus ntawm WDM yog siv qhov sib faib wavelengthmultiplexer(combiner) ntawm lub transmitter sab los sib txuas cov wavelengths sib txawv ntawm cov ntaub ntawv kho qhov muag ua ke rau hauv ib qho fiber ntau rau kev sib kis, thiab ntawm lub receiver sab, lwm wavelength division multiplexer (splitter) cais cov khoom siv kho qhov muag sib txawv.
WDM systems tag nrho ua haujlwm hauv 1550nm qhov rais. Quartz fiber ntau muaj peb pawg muaj nyob rau hauv thaj tsam 1550 wavelength, xws li S-band, C-band thiab L-band. S-band wavelength ntau yog los ntawm 1460 txog 1530nm, C-band wavelength ntau yog los ntawm 1530 txog 1565nm, thiab L-band wavelength ntau yog los ntawm 1570 txog 1605nm.
Wavelength division multiplexing (WDM) nrog 1310nm / 1550nm qhov rais yog siv rau kev nkag mus rau tes hauj lwm, tab sis tsis tshua muaj kev sib kis mus ntev. density wavelength division multiplexing (DWDM) nrog 1550nm qhov rais: tuaj yeem siv dav rau kev sib kis mus ntev thiab siv los tsim txhua qhov chaw kho qhov muag. vim covmultiplexingntawm 1310/1550nm yog dhau qhov nce ntawm EDFA, nws tsuas yog siv rau qee lub sijhawm tshwj xeeb, yog li nws feem ntau siv WDM yog lub npe dav dua los hloov DWDM. 1.25G DWDM thiab 10G DWDM optical modules tam sim no siv nyob rau hauv kev sib kis mus ntev ntawm cov pob txha caj qaum.
WDM thev naus laus zis tuaj yeem siv tag nrho cov peev txheej loj ntawm cov khoom siv kho qhov muag ntawm fiber ntau, hauv ib qho fiber ntau, WDM kis tau tus mob muaj peev xwm yog ib lub wavelength ob peb zaug, kaum zaus, ntau pua zaus. Tsis tas li ntawd, WDM thev naus laus zis teeb liab kis tau tus mob, cov kab ntawm txhua lub wavelength yog ywj siab ntawm ib leeg, tuaj yeem xa cov teeb liab nrog cov yam ntxwv sib txawv thiab tus nqi, ua kom tiav cov kev sib txuas ntawm ntau yam kev pabcuam kev sib txuas lus, xws li PDH signals thiab SDH signals, digital. Cov teeb liab thiab analog teeb liab, sib xyaw sib kis ntawm ntau yam kev pabcuam (suab, video, cov ntaub ntawv, thiab lwm yam), thiab lwm yam.