Hauv kev tshawb fawb thiab kev txhim kho cov thev naus laus zis fiber ntau tshiab, SDM qhov chaw faib multiplexing tau nyiam ntau qhov kev saib xyuas. Muaj ob txoj hauv kev tseem ceeb rau kev siv SDM hauv cov fiber ntau: core division multiplexing (CDM), uas kev sib kis tau ua tiav los ntawm lub hauv paus ntawm ntau lub fiber ntau. Los yog Mode Division Multiplexing (MDM), uas xa mus los ntawm cov hom kev sib kis ntawm ob peb hom lossis ntau hom fiber.
Core Division Multiplexing (CDM) fiber yog nyob rau hauv lub hauv paus ntsiab lus raws li kev siv ob lub ntsiab schemes.
Thawj qhov yog raws li kev siv cov pob khoom fiber ib leeg (fiber ribbons), uas cov fibers ib hom sib luag tau encapsulated ua ke los tsim cov pob khoom fiber lossis ribbons uas tuaj yeem muab txog ntau pua qhov sib txuas sib luag.
Qhov kev xaiv thib ob yog raws li kev xa cov ntaub ntawv hla ib lub core (ib hom ib lub core) uas muab tso rau hauv tib lub fiber, piv txwv li hauv MCF multicore fiber. Txhua lub core raug kho raws li ib txoj channel sib cais.
MDM (Module Division Multiplexing) fiber yog hais txog kev xa cov ntaub ntawv hla ntau hom ntawm cov fiber ntau, txhua tus tuaj yeem suav hais tias yog ib txoj kab sib cais.
Ob hom MDM uas siv ntau yog multimode fiber (MMF) thiab fractional mode fiber (FMF). Qhov txawv tseem ceeb ntawm ob hom no yog tus naj npawb ntawm hom (cov channel uas muaj). Vim tias MMF tuaj yeem txhawb nqa ntau hom (kaum hom), intermodal crosstalk thiab differential mode group delay (DMGD) tseem ceeb heev.
Kuj tseem muaj cov fiber ntau photonic crystal (PCF) uas tuaj yeem hais tias yog hom no. Nws yog raws li cov yam ntxwv ntawm cov photonic crystals, uas txwv lub teeb los ntawm qhov bandgap effect thiab xa nws los ntawm kev siv cov qhov cua hauv nws qhov cross-section. PCF feem ntau yog ua los ntawm cov ntaub ntawv xws li SiO2, As2S3, thiab lwm yam, thiab cov qhov cua tau qhia rau hauv thaj chaw ib puag ncig lub core kom hloov qhov sib piv hauv cov ntsuas refractive ntawm lub core thiab lub cladding.
CDM fiber tuaj yeem piav qhia tias tsuas yog ntxiv cov kab sib txuas ua ke ib hom fiber ntau uas nqa cov ntaub ntawv, muab tso rau hauv tib lub cladding (multi-core fiber MCF lossis ib lub tub ntxhais fiber ntau). MDM hom kev faib multiplexing yog kev siv ntau hom spatial-optical hauv qhov chaw xa xov xwm raws li cov ntaub ntawv tus kheej / sib cais / ywj pheej, feem ntau rau kev sib txuas luv luv.
Lub sijhawm tshaj tawm: Lub Rau Hli-26-2025