Nokuba kukudibanisa uluntu okanye amazwekazi ahlukeneyo, isantya kunye nokuchaneka zezona mfuno zimbini ziphambili kwiinethiwekhi ze-fiber optic ezithwala unxibelelwano olubalulekileyo. Abasebenzisi bafuna amakhonkco e-FTTH akhawulezayo kunye noqhagamshelo lweselula lwe-5G ukuze kufezekiswe unyango lwe-telemedicine, izithuthi ezizimeleyo, iinkomfa zevidiyo kunye nezinye izicelo ezisebenzisa i-bandwidth. Ngokuvela kwenani elikhulu lamaziko edatha kunye nophuhliso olukhawulezayo lobukrelekrele bokwenziwa kunye nokufunda koomatshini, kunye nesantya senethiwekhi esikhawulezayo kunye nenkxaso ye-800G nangaphezulu, zonke iimpawu zefayibha ziye zabaluleka.
Ngokwemigangatho ye-ITU-T G.650.3, i-optical time domain reflectometer (OTDR), isixhobo sokuvavanya ukulahleka kwe-optical (OLTS), i-chromatic dispersion (CD), kunye novavanyo lwe-polarization mode dispersion (PMD) ziyafuneka ukuze kwenziwe ukuchongwa kwefayibha ebanzi kunye nokuqinisekisa ukusebenza okuphezulu kwenethiwekhi. Ke ngoko, ukulawula amaxabiso e-CD kubalulekile ekuqinisekiseni ukuthembeka kokudluliselwa kunye nokusebenza kakuhle.
Nangona i-CD iluphawu lwendalo lwazo zonke ii-optical fibers, olululwandiso lwee-broadband pulses kumgama omde, ngokwemigangatho ye-ITU-T G.650.3, ukusasazwa kwe-optical fibers kuba yingxaki kwii-optical fibers ezinamazinga okudlulisa idatha adlula i-10 Gbps. I-CD inokuchaphazela kakhulu umgangatho wesignali, ingakumbi kwiinkqubo zonxibelelwano ezikhawulezayo, kwaye uvavanyo lubalulekile ekusombululeni le ngxaki.
Yintoni iCD?
Xa ukukhanya kwee-wavelengths ezahlukeneyo kusasazeka kwiifayibha ze-optical, ukusasazeka kokukhanya kunokubangela ukungqubana kwe-pulse kunye nokuphambuka, ekugqibeleni kukhokelele ekunciphiseni umgangatho wesignali edlulisiweyo. Kukho iintlobo ezimbini zokusasazeka: ukusasazeka kwezinto kunye nokusasazeka kwe-waveguide.
Ukusasazwa kwezinto yinto eyenzeka kuzo zonke iintlobo zeefayibha ze-optical, ezinokubangela ukuba ubude bamaza ahlukeneyo busasazeke ngesantya esahlukileyo, ekugqibeleni oku kubangele ubude bamaza bufikelele kwi-transceiver ekude ngamaxesha ahlukeneyo.
Ukusasazwa kwe-waveguide kwenzeka kwisakhiwo se-waveguide see-optical fibers, apho imiqondiso ye-optical isasazeka nge-core kunye ne-cladding yee-fibers, ezine-refractive indices ezahlukeneyo. Oku kubangela utshintsho kububanzi be-mode field kunye notshintsho kwisantya sesignali kwi-wavelength nganye.
Ukugcina inqanaba elithile le-CD kubalulekile ukuze kuthintelwe ukwenzeka kwezinye iziphumo ezingezizo ezomgca, ngoko ke akukho CD ilungileyo. Kodwa i-CD kufuneka ilawulwe kwinqanaba elamkelekileyo ukuze kuthintelwe iimpembelelo ezimbi ekugqibeleleni kwesignali kunye nomgangatho wenkonzo.
Iyintoni impembelelo yohlobo lwefayibha ekusasazekeni?
Njengoko bekutshiwo ngaphambili, i-CD luphawu lwendalo oluvela kuyo nayiphi na i-optical fiber, kodwa uhlobo lwe-fiber ludlala indima ebalulekileyo ekulawuleni i-CD. Abaqhubi benethiwekhi banokukhetha i-dispersion fibers okanye i-fibers "zendalo" ezine-dispersion curves ezichaseneyo ukunciphisa impembelelo ye-CD ngaphakathi koluhlu oluthile lwe-wavelength.
Eyona fiber isetyenziswa kakhulu kwiinethiwekhi zanamhlanje yifayibha eqhelekileyo ye-ITU-T G.652 ene-dispersion yendalo. Ifayibha eshiftiweyo ye-ITU-T G-653 zero dispersion ayixhasi ukuhanjiswa kwe-DWDM, ngelixa ifayibha eshiftiweyo ye-G.655 engekho zero ine-CD ephantsi, kodwa ilungiselelwe umgama omde kwaye ibiza kakhulu.
Ekugqibeleni, abaqhubi kufuneka baqonde iintlobo ze-fiber optics kwiinethiwekhi zabo. Ukuba uninzi lwee-optical fibers ziyi-G.652 eqhelekileyo, kodwa ezinye zezinye iintlobo zee-fibers, ngoko ke ukuba ii-CD kuzo zonke ii-links azibonakali, umgangatho wenkonzo uya kuchaphazeleka.
Ukuququmbela
Ukusasazwa kweChromatic kusengumngeni ekufuneka ujongwane nawo ukuqinisekisa ukuthembeka nokusebenza kakuhle kweenkqubo zonxibelelwano ezikhawulezayo. Iimpawu zefayibha kunye novavanyo zibalulekile ekusombululeni ubunzima bokusasazwa, zibonelela ngolwazi kwiingcali kunye neenjineli malunga nokuyila, ukusasaza, kunye nokugcina iziseko ezithwala unxibelelwano olubalulekileyo lwehlabathi. Ngophuhliso oluqhubekayo kunye nokwandiswa kwenethiwekhi, iSoftel iya kuqhubeka nokuvelisa nokuqalisa izisombululo kwimarike, ikhokele indlela ekuxhaseni ukwamkelwa kobuchwepheshe obuphambili.
Ixesha lokuthumela: Matshi-20-2025