1. I-fiber ye-Multimode
Uma usayizi wejiyometri we-fiber (ngokuyinhloko ububanzi obuyi-core d1) bukhulu kakhulu kunobude bokukhanya (cishe u-1 µm), kuzoba nezindlela eziningi noma ngisho namakhulu zokusabalala ku-fiber. Izindlela ezahlukene zokusabalala zinejubane nezigaba zokusabalala ezihlukene, okuholela ekubambezelekeni kwesikhathi kanye nokwandiswa kwama-optical pulses ngemva kokudluliselwa kwebanga elide. Lesi simo sibizwa ngokuthi i-modal dispersion (eyaziwa nangokuthi i-intermodal dispersion). i-fiber optics.
Ukusabalala kwe-modal kuzonciphisa ububanzi be-fiber ye-multimode futhi kunciphise umthamo wayo wokudlulisa, ngakho-ke i-fiber ye-multimode ifaneleka kuphela ekuxhumaneni kwe-fiber optic enomthamo omncane.
Ukusatshalaliswa kwenkomba yokubuyisa ye-fiber ye-multimode ngokuyinhloko kuyi-parabolic, okusho ukuthi inenkomba yokubuyisa elinganisiwe. Ububanzi bayo obuyinhloko bungaba ngu-50 µm.
2. I-fiber yemodi eyodwa
Uma usayizi wejiyometri wefayibha (ikakhulukazi ububanzi obuyinhloko) ungasondela kubude bokukhanya, isibonelo, ububanzi obuyinhloko d1 buphakathi kuka-5-10 µm, ifayibha ivumela imodi eyodwa kuphela (imodi eyisisekelo HE11) ukuthi isakazeke kuyo, kanti ezinye izindlela ze-oda eliphezulu ziyanqunywa; imicu enjalo ibizwa ngokuthi imicu yemodi eyodwa.
Njengoba inemodi eyodwa kuphela yokusabalala futhi igwema inkinga yokusabalala kwemodi, i-fiber yemodi eyodwa inomkhawulokudonsa obanzi kakhulu futhi ifaneleka kakhulu ekuxhumaneni kwe-fiber optic enamandla aphezulu. Ngakho-ke, ukuze kufezwe ukudluliswa kwemodi eyodwa, amapharamitha e-fiber kumele ahlangabezane nezimo ezithile. Kubalwa kusetshenziswa ifomula yokuthi ku-fiber ene-NA=0.12, ukuze kufezwe ukudluliswa kwemodi eyodwa ngaphezu kuka-λ=1.3 µm, irediyasi ye-fiber core kumele ibe ngu-≤4.2 µm, okungukuthi, ububanzi bayo obuyinhloko d1≤8.4 µm.
Njengoba ububanzi obuyinhloko be-fiber optical yemodi eyodwa buncane kakhulu, kunezidingo eziqinile ezibekwa enqubweni yayo yokukhiqiza.
Isikhathi sokuthunyelwe: Jan-10-2023
