Nyob rau hauv tib lub fiber ntau, ob los yog ntau tshaj optical wavelength signals xa cov ntaub ntawv los ntawm txawv optical channels nyob rau tib lub sij hawm, uas yog hu ua optical wavelength division multiplexing technology, los yogWDMluv luv. Optical wavelength division multiplexing suav nrog zaus division multiplexing thiab wavelength division multiplexing. Tsis muaj qhov sib txawv ntawm qhov sib txawv ntawm optical zaus division multiplexing (FDM) technology thiab optical wavelength division multiplexing (WDM) technology, vim hais tias lub teeb nthwv dej yog ib feem ntawm electromagnetic tsis, thiab qhov zaus ntawm lub teeb muaj ib qho kev sib txuas lus nrog wavelength. Feem ntau nws kuj tuaj yeem nkag siab zoo li no, optical zaus division multiplexing yog hais txog kev faib tawm ntawm optical frequencies, thiab optical channels yog tuab heev. Optical wavelength division multiplexing yog hais txog qhov sib faib tsis sib haum ntawm optical frequencies, thiab cov kev kho qhov muag nyob deb sib nrug, txawm nyob rau hauv qhov sib txawv ntawm cov fiber ntau optical.
Optical wavelength faib multiplexingFeem ntau siv wavelength division multiplexers thiab demultiplexers (tseem hu ua multiplexers/demultiplexers) muab tso rau ntawm ob qhov kawg ntawm fiber ntau kom paub txog qhov sib txuas thiab sib cais ntawm lub teeb sib txawv. Lub hauv paus ntsiab lus ntawm ob lub cuab yeej no yog tib yam. Lub ntsiab hom ntawm optical wavelength division multiplexers yog fused taper type, dielectric film type, grating type and flat type. Nws cov yam ntxwv tseem ceeb qhia tau yog qhov poob thiab kev sib cais. Feem ntau, qhov nce ntawm qhov poob ntawm qhov kev sib txuas ntawm qhov muag pom yog hu ua qhov poob ntawm lub wavelength division multiplexing vim yog siv cov khoom siv wavelength division multiplexing hauv cov khoom siv kho qhov muag. Thaum lub wavelengths 11 thiab l2 kis tau los ntawm tib fiber ntau, qhov sib txawv ntawm lub hwj chim ntawm input kawg l2 ntawm lub demultiplexer thiab lub zog sib xyaw hauv cov fiber ntau ntawm cov zis kawg ntawm 11 yog hu ua kev sib cais.
Tam sim no, cov khoom siv WDM thev naus laus zis hauv kev ua lag luam feem ntau suav nrog CWDM thiab DWDM.
