Ulwazi oluyisisekelo lwe-fiber optics

1. Imicu yokukhanya ikudlulisa kanjani ukukhanya?

Ukuqashelwa kokuxhumana ngu i-fiber optics Kusekelwe esimisweni sokubonakaliswa kokukhanya okuphelele.
Uma ukukhanya kusakazeka kuya enkabeni ye-fiber, inkomba yokukhanya n1 ye-fiber core inkulu kuneye-cladding n2, futhi ukulahlekelwa yi-core kuncane kunokwe-cladding, ngakho-ke ukukhanya kuzodlula ekukhanyeni kwangaphakathi okuphelele futhi amandla alo okukhanya adluliselwa ikakhulukazi enkabeni. Ngenxa yokukhanya kwangaphakathi okuphelele okulandelanayo, ukukhanya kungadluliselwa kusuka komunye umkhawulo kuya komunye.

2. Imicu yokukhanya ihlukaniswa kanjani?

Ihlukaniswe ngemodi yokudlulisela: i-fiber yemodi eyodwa kanye ne-fiber yemodi eminingi.
I-fibre yemodi eyodwa inobubanzi obuncane obuyi-core futhi ingadlulisela amaza okukhanya kuphela kwimodi eyodwa.
I-fibre ye-Multimode inobubanzi obukhulu be-core futhi ingadlulisa amaza okukhanya ngezindlela eziningi.
Ungahlukanisa futhi i-fiber yemodi eyodwa ne-fiber yemodi eminingi ngombala wokubukeka kwayo:
Iningi le imicu yokukhanya Imicu yemodi eyodwa inejakethi ephuzi kanye nesixhumi esiluhlaza okwesibhakabhaka, kanti ingaphakathi lekhebula lingu-9.0 μm. Kunezingqimba ezimbili zamaza eziyinhloko zefayibha yemodi eyodwa: 1310 nm kanye no-1550 nm. I-1310 nm ngokuvamile isetshenziselwa ukudlulisa okufushane, okuphakathi, noma okude, kanye ne-1550 nm yokudlulisa okude nokude kakhulu. Ibanga lokudlulisa lincike emandleni okudlulisa emojuli ye-optical. Ibanga lokudlulisa lembobo yemodi eyodwa engu-1310 nm lingu-10 km, 30 km, 40 km, njll., kanti ibanga lokudlulisa lembobo yemodi eyodwa engu-1550 nm lingu-40 km, 70 km, 100 km, njll.

Imicu ye-optical ye-Multimode iningi layo linombala ophuzi/ompunga onama-connector amnyama/abeige, kanti ububanzi obuyinhloko bungu-50.0 μm kanye no-62.5 μm. Ububanzi obuphakathi be-fiber ye-multimode buvame ukuba ngu-850 nm. Ibanga lokudlulisela le-fiber ye-optical ye-multimode lifushane kakhulu, ngokuvamile lingaphakathi kwamamitha angu-500.

Ukuhlukaniswa ngokwezindinganiso zomhlaba wonke ze-ITU-T: G.651, G.652, G.653, G.654, G.655, G.656, G.657.