Ekucwaningweni nasekuthuthukisweni kobuchwepheshe obusha be-optical fibre, i-SDM space division multiplexing idonsele ukunaka okukhulu. Kuneziqondiso ezimbili eziyinhloko zokusetshenziswa kwe-SDM kuma-optical fibre: i-core division multiplexing (CDM), lapho ukudluliselwa kwenziwa khona nge-core ye-multi-core optical fibre. Noma i-Mode Division Multiplexing (MDM), edlulisa ngezindlela zokusabalalisa ze-mode-mode noma i-multi-mode fibre.
I-fibre ye-Core Division Multiplexing (CDM) ngokwesisekelo isekelwe ekusetshenzisweni kwezinhlelo ezimbili eziyinhloko.
Esokuqala sisekelwe ekusetshenzisweni kwama-fibre bundles angumongo owodwa (ama-fibre ribbons), lapho ama-fibre e-single-mode ahambisanayo ahlanganiswa ndawonye ukuze akhe ama-fibre bundles noma ama-ribbons anganikeza izixhumanisi ezifika kumakhulu ezifanayo.
Inketho yesibili isekelwe ekudluliseni idatha phezu kwe-core eyodwa (imodi eyodwa nge-core) efakwe ku-fiber efanayo, okungukuthi ku-MCF multicore fibre. I-core ngayinye iphathwa njengesiteshi esisodwa esihlukile.
I-fiber ye-MDM (Module Division Multiplexing) ibhekisela ekudlulisweni kwedatha ngezindlela ezahlukene ze-fiber optical, ngayinye yazo engabhekwa njengesiteshi esihlukile.
Izinhlobo ezimbili ezivamile ze-MDM yi-multimode fibre (MMF) kanye ne-fractional mode fibre (FMF). Umehluko omkhulu phakathi kwalezi ezimbili inani lamamodi (iziteshi ezitholakalayo). Njengoba ama-MMF engasekela inani elikhulu lamamodi (amashumi amamodi), i-intermodal crosstalk kanye ne-differential mode group delay (DMGD) ziba zibalulekile.
Kukhona futhi i-photonic crystal fibre (PCF) okungashiwo ukuthi ingeyalolu hlobo. Isekelwe ezimpahleni zamakristalu e-photonic, avimba ukukhanya ngomphumela we-bandgap futhi akudlulisele kusetshenziswa imigodi yomoya engxenyeni yayo evundlile. I-PCF yenziwe kakhulu ngezinto ezifana ne-SiO2, i-As2S3, njll., futhi imigodi yomoya ifakwa endaweni ezungeze umongo ukuze kushintshwe umehluko ku-refractive index phakathi komongo kanye ne-cladding.
I-CDM fibre ingachazwa njengokumane nje kufakwe ama-parallel single-mode fibre cores aphethe ulwazi, afakwe ku-cladding efanayo (i-multi-core fibre MCF noma i-single-core fibre bundle). I-MDM mode division multiplexing ukusetshenziswa kwama-spatial-optical mode amaningi endaweni yokudlulisa njengeziteshi zedatha ezizimele/ezizimele/ezizimele, ngokuvamile zokudlulisa okuxhumene ibanga elifushane.
Isikhathi sokuthunyelwe: Juni-26-2025