Iyiphi i-optical fiber esetshenziselwa ukwakha inethiwekhi yokudlulisela?
Kunezinhlobo ezintathu eziyinhloko: i-G.652 i-fiber yemodi eyodwa evamile, i-G.653 i-dispersion-shifted single-mode fiber and G.655 ifayibha engashintshiwe ye-dispersion-shifted.
G.652 ifayibha yemodi eyodwainokusabalalisa okukhulu ku-C-band 1530~1565nm kanye ne-L-band 1565~1625nm, ngokuvamile engu-17~22psnm•km, uma izinga lesistimu lifinyelela ku-2.5Gbit/s noma ngaphezulu, kuyadingeka isinxephezelo sokuhlakazwa, esinxephezelweni sika-10Gbit/s Izindleko zohlelo ziphezulu uma kuqhathaniswa, futhi wuhlobo olujwayeleke kakhulu lwefayibha ebekwe kunethiwekhi yokudlulisa okwamanje.
Ukuhlakazeka kweI-G.653 i-dispersion-shifted fiberku-C-band kanye ne-L-band ngokuvamile ingu-1～3.5psnm•km, i-zero dispersion ku-1550nm, futhi izinga lesistimu lingafinyelela ku-20Gbit/s kanye no-40Gbit/s, okuyibanga elilodwa-wavelength ultra-long ukudluliselwa I-fiber engcono kakhulu.Kodwa-ke, ngenxa yesici sayo se-zero-dispersion, lapho i-DWDM isetshenziselwa ukunwetshwa, imiphumela engaqondile izokwenzeka, okuholela ku-signal crosstalk, okuholela ekuxubeni kwamagagasi amane i-FWM, ngakho-ke i-DWDM ayifaneleki.
I-G.655 i-fiber engashintshiwe ye-dispersion-shifted: I-G.655 i-non-zero dispersion-shifted fiber ine-dispersion of 1 ukuya ku-6 psnm•km ku-C-band, futhi ngokuvamile i-6-10 psnm•km ku-L-band.Ukuhlakazeka kuncane futhi kugwema u-zero.Indawo yokusabalalisa ayicindezeli kuphela i-FWM yokuxuba amagagasi amane, ingasetshenziselwa ukunwetshwa kwe-DWDM, kodwa futhi ingavula izinhlelo zejubane eliphezulu.Ifayibha entsha ye-G.655 inganweba indawo ephumelelayo ibe izikhathi ezingu-1.5 kuya kwezingu-2 kunefayibha evamile, futhi indawo enkulu ephumelelayo inganciphisa ukuminyana kwamandla!
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