Hauv kev tshawb fawb thiab kev tsim kho cov thev naus laus zis tshiab kho qhov muag, SDM chaw faib multiplexing tau nyiam cov xim zoo nkauj.Nws muaj ob lub ntsiab lus qhia rau kev siv SDM hauv optical fibers: core division multiplexing (CDM), uas kis tau tus mob los ntawm cov tub ntxhais ntawm ib tug multi-core optical fibers. Los yog Hom Division Multiplexing (MDM), uas kis tau los ntawm kev nthuav tawm hom ntawm ob peb hom lossis ntau hom fiber ntau.
Core Division Multiplexing (CDM) fiber ntau yog nyob rau hauv txoj cai raws li kev siv ob lub tswv yim tseem ceeb.
Thawj yog raws li kev siv ib leeg-core fiber bundles (fibre ribbons), nyob rau hauv uas tib lub hom fibers yog encapsulated ua ke los tsim fiber ntau bundles los yog ribbons uas muaj peev xwm muab mus txog rau pua pua ntawm kev sib txuas.
Qhov kev xaiv thib ob yog ua raws li kev xa cov ntaub ntawv hla ib qho tseem ceeb (ib hom ib tus tub ntxhais) kos rau hauv tib lub fiber, piv txwv li hauv MCF fiber ntau. Txhua tus tub ntxhais raug kho raws li ib qho kev sib cais.
MDM (Module Division Multiplexing) fiber ntau yog hais txog kev xa cov ntaub ntawv hla ntau hom kev kho qhov muag, txhua qhov tuaj yeem suav tias yog ib qho kev sib cais.
Ob hom MDM yog multimode fiber (MMF) thiab fractional hom fiber (FMF). Qhov sib txawv tseem ceeb ntawm ob yog tus naj npawb ntawm hom (muaj raws). Txij li thaum MMFs tuaj yeem txhawb nqa ntau hom (ntau hom), intermodal crosstalk thiab sib txawv hom pab pawg qeeb (DMGD) ua qhov tseem ceeb.
Kuj tseem muaj photonic siv lead ua fiber ntau (PCF) uas tuaj yeem hais tau rau hom no. Nws yog raws li cov khoom ntawm photonic crystals, uas kaw lub teeb los ntawm bandgap nyhuv thiab xa mus rau nws siv cua qhov nyob rau hauv nws cross-section.PCF yog tsuas yog ua los ntawm cov ntaub ntawv xws li SiO2, As2S3, thiab lwm yam., thiab huab cua qhov yog qhia nyob rau hauv lub cheeb tsam nyob ib ncig ntawm lub hauv paus nyob rau hauv thiaj li yuav hloov qhov sib piv nyob rau hauv refractive index ntawm cov tub ntxhais thiab cladding.
CDM fiber ntau tuaj yeem piav qhia tau yooj yim qhov sib ntxiv ntawm ib leeg-hom fiber ntau cores nqa cov ntaub ntawv, kos rau hauv tib lub cladding (multi-core fiber ntau MCF lossis ib leeg-core fiber ntau pob).
Post lub sij hawm: Jun-26-2025