Kunamabanga ama-5 efayibha ye-multimode: i-OM1, i-OM2, i-OM3, i-OM4, futhi manje i-OM5. Yini ngempela ebenza bahluke?
Empeleni (uxolo, i-pun), okuhlukanisa lawa mabanga amafayibha amasayizi awo ayisisekelo, ama-transmitters, namandla omkhawulokudonsa.
Amafayibha e-Optical multimode (OM) anomgogodla ongu-50 µm (OM2-OM5) noma 62.5 µm (OM1). Ingqikithi enkulu isho ukuthi izindlela eziningi zokukhanya zihamba phansi phakathi ngesikhathi esisodwa, ngaleyo ndlela kuqanjwe “imodi eningi.”
I-Legacy Fibers
Okubalulekile, usayizi oyinhloko we-OM1 ongu-62.5 µm usho ukuthi awuhambisani namanye amabanga e-multimode futhi ayikwazi ukwamukela izixhumi ezifanayo. Njengoba i-OM1 ne-OM2 zombili zingaba namajakhethi awolintshi angaphandle (ngokwezinga le-TIA/EIA), njalo hlola inganekwane yokuphrinta kukhebula ukuze uqinisekise ukuthi usebenzisa izixhumi ezifanele.
Imicu yangaphambilini ye-OM1 ne-OM2 yomibili yayidizayinelwe ukusetshenziswa nemithombo ye-LED noma ama-transmitters. Imikhawulo yokuguquguquka kwama-LED ngokufanayo ikhawulele amandla e-OM1 kanye ne-OM2 yangaphambili.
Kodwa-ke, isidingo esikhulayo sejubane sasisho ukuthi ama-optical fibers adinga amakhono aphezulu omkhawulokudonsa. Faka i-laser-optimized multimode fibers (LOMMF):OM2, OM3 ne-OM4, futhi manje i-OM5.
I-Laser-optimization
Amafayibha e-OM2, OM3, OM4, kanye ne-OM5 adizayinelwe ukuthi asebenze ngamalaser e-vertical-cavity surface-emitting lasers (VCSELs), ngokuvamile angu-850 nm. Namuhla, i-OM2 eyenziwe nge-laser (efana neyethu) nayo itholakala kalula. Ama-VCSEL avumela izilinganiso zokuguquguquka ezishesha kakhulu kunama-LED, okusho ukuthi imicu eyenziwe nge-laser ingadlulisela idatha eyengeziwe kakhulu.
Ngamazinga emboni, i-OM3 inomkhawulokudonsa osebenzayo we-modal (EMB) we-2000 MHz*km ku-850 nm. I-OM4 ingakwazi ukuphatha u-4700 MHz*km.
Mayelana nokuhlonza, i-OM2 igcina ibhantshi eliwolintshi, njengoba kuphawuliwe ngenhla. I-OM3 ne-OM4 zombili zingaba nejakhethi yangaphandle ye-aqua (lokhu kuyiqiniso ngezintambo zokuchibiyela ze-Cleerline OM3 ne-OM4). I-OM4 ingavela nejakhethi yangaphandle ethi “Erika violet”. Uma ungena kukhebuli ye-magenta fibre optic ekhanyayo, kungenzeka ukuthi i-OM4. Ngokujabulisayo, i-OM2, OM3, OM4, ne-OM5 zonke ziyi-50/125 µm fibers futhi zingamukela izixhumi ezifanayo. Qaphela, nokho, ukuthi amakhodi ombala wesixhumi ayahluka. Ezinye izixhumi ze-multimode zingamakwa “njengezilungiselelwe i-OM3/OM4 fiber” futhi zizoba yi-aqua enombala. Izixhumi ezijwayelekile ze-laser-optimized multimode zingaba beige noma zibe mnyama. Uma kunokudideka, sicela uhlole ukucaciswa kwesixhumi ngokuqondile ngokuphathelene nosayizi oyinhloko. Ukufanisa usayizi oyinhloko kuyimfanelo ebaluleke kakhulu yezixhumi zemishini, njengoba iqinisekisa ukuthi isignali izogcina ukuqhubeka ngesixhumi.
Isikhathi sokuthumela: Aug-01-2022