Ulwazi olusisiseko lwefiber optics

1.Iintsinga zamehlo zikuhambisa njani ukukhanya?

Ukuqhuba unxibelelwanoi-fiber opticalIsekelwe kumgaqo wokubonakalisa ukukhanya ngokupheleleyo.
Xa ukukhanya kusasazeka ngokubhekiselele kumbindi wefiber, isalathisi se-refractive n1 se-fiber core sikhulu kuneso sigqubuthelo se-n2, kwaye ukulahleka kwe-core kungaphantsi kwe-cladding, ngoko ke ukukhanya kuya kuba ne-reflection total. kwaye amandla ayo okukhanya asasazwa kumbindi ngenxa yokulandelana okupheleleyo, ukukhanya kunokudluliselwa ukusuka kwelinye icala ukuya kwelinye.

2.Zihlelwa njani iifiber zamehlo?

Ihlelwe ngemodi yothumelo: i-fiber yemodi enye kunye ne-multimode fiber.
Ifiber yemowudi enye inodayamitha engundoqo encinci kwaye inokuhambisa amaza okukhanya kwimowudi enye.
Ifayibha ye-Multimode inomthamo omkhulu ongundoqo kwaye inokuhambisa amaza okukhanya ngeendlela ezininzi.
Unokwahlula kwakhona ifayibha yendlela enye kwifiber yemultimode ngombala wenkangeleko:
Uninzi lweiintsinga zamehloImowudi enye inejacket etyheli kunye nesixhumi esiluhlaza okwesibhakabhaka, kwaye i-cable core yi-9.0 μm. Kukho amaza amabini angundoqo e-fiber yemowudi enye: 1310 nm kunye ne-1550 nm. I-1310 nm isetyenziswa ngokubanzi kuthumelo olufutshane, oluphakathi okanye olude, kunye ne-1550 nm kuthumelo lomgama omde kunye nomgama omde. ukuhanjiswa kude. Umgama wothumelo uxhomekeke kumandla othumelo lwemodyuli ye-optical Umgama wothumelo lwe-1310nm i-port ye-mode eyodwa yi-10km, i-30km, i-40km, njl. , 100 km, njl.

I-Multimode optical fibers ininzi i-orenji / iibhatyi ezingwevu kunye nezixhumi ezimnyama / ze-beige, kunye ne-cable cores yi-50.0 μm kunye ne-62.5 μm. Ubude obusembindini befayibha yemultimode ngokuqhelekileyo yi850nm. Umgama wothumelo we-multimode fiber optical mfutshane, ngokubanzi ngaphakathi kwe-500m.

Ukuhlelwa ngokwemigangatho ye-ITU-T yamazwe ngamazwe: G.651, G.652, G.653, G.654, G.655, G.656, G.657.