Ngophuhliso lwenethiwekhi kunye nenkqubela phambili yetekhnoloji, abaninzi abavelisi becandelo lefiber optic baye bavela kwimarike, bezama ukubamba isabelo sehlabathi lenethiwekhi.Ekubeni aba bavelisi bevelisa amacandelo ahlukeneyo, injongo yabo kukwenza umgangatho ophezulu kunye namacandelo ahambelanayo ukuze abathengi bakwazi ukuxuba amacandelo ahlukeneyo kubenzi abahlukeneyo.Oku kubangelwa ikakhulu kwiinkxalabo zemali, njengoko amaziko amaninzi edatha ahlala efuna izisombululo ezingabizi kakhulu ukuphumeza kwiinethiwekhi zabo.
Ii-transceivers zamehloziyinxalenye ebalulekileyo yothungelwano lwefiber optic.Baguqula kwaye baqhube intambo yefiber optic kuyo.Ziquka iinxalenye ezimbini eziphambili: isidluliseli kunye nomamkeli.Xa kuziwa kugcino kunye nokusombulula ingxaki, kubalulekile ukuba ukwazi ukuqikelela, ukuvavanya, kunye nokufumanisa apho iingxaki zinokuthi zenzeke okanye zenzeke phi.Ngamanye amaxesha, ukuba uxhulumaniso alufikeleli kwisantya esilindelekileyo sempazamo encinci, asinakukwazi kwakqala krwaqu ukuba yeyiphi indawo yoqhagamshelo ebangela ingxaki.Inokuba yintambo, i-transceiver, umamkeli okanye zombini.Ngokubanzi, iinkcukacha kufuneka ziqinisekise ukuba nawuphi na umamkeli uya kusebenza ngokufanelekileyo nakwesiphi na isidluliseli esibi kakhulu, kwaye ngokuchaseneyo, nasiphi na isidluliseli siya kubonelela ngophawu lomgangatho owaneleyo ukuba ucholwe nguye nawuphi na owamkela imeko embi kakhulu.Iikhrayitheriya zezona meko zimbi zidla ngokuba yeyona nto inzima ukuyichaza.Nangona kunjalo, kukho amanyathelo amane okuvavanya i-transmitter kunye ne-receiver iinxalenye ze-transceiver.
Xa uvavanya icandelo le-transmitter, uvavanyo lubandakanya ukuvavanya ubude be-wavelength kunye nemilo yesiginali yokuphuma.Kukho amanyathelo amabini okuvavanya i-transmitter:
Ukukhutshwa kokukhanya kwe-transmitter kufuneka kuvavanywe ngoncedo lweemethrikhi ezininzi zomgangatho wokukhanya, njengovavanyo lwemaski, i-optical modulation amplitude (OMA), kunye ne-extinction ratio.Uvavanyo usebenzisa uvavanyo lwemaski yedayagramu yamehlo, indlela eqhelekileyo yokujonga iifomati zamaza osasazo kunye nokubonelela ngolwazi malunga nokusebenza komthumeli ngokubanzi.Kumzobo wamehlo, zonke iindibaniselwano zeepateni zedatha zibekwe ngaphezulu kwenye kwenye kwi-axis yexesha eliqhelekileyo, ngokwesiqhelo ngaphantsi kwebits ezimbini ububanzi.Inxalenye yokufumana uvavanyo yeyona nto inzima yenkqubo, kodwa kukho amanyathelo amabini ovavanyo:
Inxalenye yokuqala yovavanyo kukuqinisekisa ukuba umamkeli unokuthabatha isignali ekumgangatho ophantsi kwaye ayiguqule.Oku kwenziwa ngokuthumela ukukhanya okukumgangatho ophantsi kumamkeli.Kuba olu luphawu lokukhanya, kufuneka lulinganiswe kusetyenziswa i-jitter kunye nemilinganiselo yamandla optical.Enye inxalenye yovavanyo kukuvavanya igalelo lombane kumamkeli.Ngeli nyathelo, iintlobo ezintathu zovavanyo kufuneka zenziwe: uvavanyo lwemaski yamehlo ukuqinisekisa ukuvulwa kwamehlo okukhulu ngokwaneleyo, uvavanyo lwe-jitter ukuvavanya iintlobo ezithile zesixa se-jitter kunye novavanyo lokunyamezela i-jitter, kunye novavanyo lokukwazi komamkeli ukulandelela ijitter ngaphakathi kwayo. loop bandwidth.
Ixesha lokuposa: Sep-13-2022