Kukho amanqanaba ama-5 e-multimode fiber: OM1, OM2, OM3, OM4, kwaye ngoku yi-OM5. Yintoni kanye kanye eyenza zahluke?
Kwisiseko (uxolo nomdlalo ohlekisayo), into eyahlula la manqanaba efayibha bubungakanani bawo obuphambili, ii-transmitters, kunye nobuchule be-bandwidth.
Iifayibha ze-optical multimode (OM) zinombindi we-50 µm (OM2-OM5) okanye i-62.5 µm (OM1). Umbindi omkhulu uthetha ukuba iindlela ezininzi zokukhanya zihamba ngaphantsi kombindi ngaxeshanye, ngoko ke igama elithi “multimode.”
IiFibers zeLifa
Okubalulekileyo kukuba, ubungakanani be-OM1 obuyi-62.5 µm buthetha ukuba ayihambelani nezinye ii-grades ze-multimode kwaye ayinakwamkela izihlanganisi ezifanayo. Ekubeni i-OM1 kunye ne-OM2 zombini zinokuba neejakethi zangaphandle ezi-orenji (ngokwemigangatho ye-TIA/EIA), soloko ujonga i-legend yoshicilelo kwintambo ukuqinisekisa ukuba usebenzisa izihlanganisi ezichanekileyo.
Iifayibha zokuqala ze-OM1 kunye ne-OM2 zombini zenzelwe ukusetyenziswa nemithombo ye-LED okanye ii-transmitters. Ukulinganiselwa kokuguquguquka kwee-LED nako kunciphisa amandla e-OM1 kunye ne-OM2 yokuqala.
Nangona kunjalo, isidingo esikhulayo sesantya sithetha ukuba iifayibha ze-optical zifuna amandla aphezulu e-bandwidth. Ngena kwiifayibha ze-multimode ezilungiselelwe nge-laser (LOMMF): OM2, OM3 kunye ne-OM4, kwaye ngoku yi-OM5.
Ukwenziwa ngcono kweLaser
Iifayibha ze-OM2, OM3, OM4, kunye ne-OM5 zenzelwe ukusebenza ngee-laser ezikhupha ubuso ezithe nkqo (ii-VCSEL), ngokubanzi kwi-850 nm. Namhlanje, i-OM2 eyenziwe nge-laser (efana neyethu) nayo ifumaneka ngokulula. Ii-VCSEL zivumela amazinga okuguqulwa kwemodulation akhawulezayo kakhulu kunee-LED, oko kuthetha ukuba iifayibha ezenziwe nge-laser zinokudlulisela idatha eninzi kakhulu.
Ngokwemigangatho yoshishino, i-OM3 ine-bandwidth esebenzayo (EMB) ye-2000 MHz*km kwi-850 nm. I-OM4 inokusingatha i-4700 MHz*km.
Ngokuphathelele ukuchonga, i-OM2 igcina ijakethi yeorenji, njengoko kuphawuliwe apha ngasentla. I-OM3 kunye ne-OM4 zombini zinokuba nejakethi yangaphandle ye-aqua (oku kuyinyani kwiintambo ze-Cleerline OM3 kunye ne-OM4 patch). I-OM4 ingabonakala ngenye indlela nejakethi yangaphandle ye-"Erika violet". Ukuba udibana nentambo ye-fiber optic ekhanyayo, mhlawumbi yi-OM4. Ngethamsanqa, i-OM2, i-OM3, i-OM4, kunye ne-OM5 zonke ziifayibha ze-50/125 µm kwaye zonke zingamkela izihlanganisi ezifanayo. Nangona kunjalo, qaphela ukuba iikhowudi zombala wesihlanganisi ziyahluka. Ezinye izihlanganisi ze-multimode zinokuphawulwa njenge-"optimized for OM3/OM4 fiber" kwaye ziya kuba nombala we-aqua. Izihlanganisi ze-multimode ezilungiselelwe i-laser eziqhelekileyo zinokuba yi-beige okanye zimnyama. Ukuba kukho ukudideka, nceda ujonge iinkcukacha zesihlanganisi ngokukodwa malunga nobukhulu be-core. Ukufanisa ubungakanani be-core yeyona nto ibalulekileyo kwizihlanganisi ze-mechanical, njengoko kuqinisekisa ukuba isignali iya kugcina ukuqhubeka kwesihlanganisi.
Ixesha lokuthumela: Agasti-01-2022