Kwiminyaka emininzi ngoku, isiseko sothumelo lwedatha ibe yindlela yokubona. Kunzima ukucinga ngomfundi we-habra ongaqhelananga nale teknoloji, kodwa akunakwenzeka ukwenza ngaphandle kwenkcazo emfutshane kuluhlu lwam lwamanqaku.
Iziqulatho zoluhlu lwamanqaku
- Icandelo 9: Intloko
- Icandelo 10: Ukulungisa inethiwekhi yeCATV
Ukugqibezela lo mfanekiso, ndiza kukuxelela ngokufutshane nangendlela elula malunga neqela lezinto ezibhanela (ungandiphosi izilayidi, le yeyabo bangazi ngokupheleleyo): i-fiber optical yiglasi eyoluliweyo. umsonto obhityileyo kunonwele. Umqadi owenziwe ngelaser usasazeke ngawo, othi (njengawo nawaphi na amaza ombane we-electromagnetic) unezawo ezikhethekileyo. Ukuze kube lula kunye nokulula, xa uthetha nge-optics, endaweni ye-frequency hertz, sebenzisa i-wavelength yayo eguquguqukayo, ekuluhlu lwe-optical lulinganiswa kwiinanometers. Kusasazo lwesiginali yentambo kamabonakude, Ξ»=1550nm idla ngokusetyenziswa.
Amacandelo omgca adibaniswe omnye komnye nge-welding okanye izixhumi. Unokufunda ngakumbi malunga noku kwi . Manditsho nje ukuba uthungelwano lwe-CATV phantse luhlala lusebenzisa i-APC oblique polishing.
Umfanekiso ovela kwifiber-optic-solutions.com
Yazisa ukuthomalalisa kancinci kunophawu oluthe ngqo, kodwa inepropathi ebaluleke kakhulu: isiginali ebonakaliswe kwindawo yokuhlangana ayisasazeki kwi-axis efanayo njengophawu oluphambili, ngenxa yokuba inempembelelo encinci kuyo. Kwiinkqubo zothumelo lwedijithali kunye ne-redundancy eyakhelwe-ngaphakathi kunye ne-algorithms yokubuyisela, oku kubonakala kungabalulekanga, kodwa isignali kamabonwakude yaqala uhambo lwayo njengophawu lwe-analog (kwifiber optics ngokunjalo), kwaye kuyo oku kubaluleke kakhulu: wonke umntu ukhumbula isiporho okanye umfanekiso. zichwechwe koomabonakude abadala ngokungaqinisekanga ngokwamkelwa. Iziganeko ezifanayo zamaza zenzeka emoyeni nakwiintambo. Isiginali yeTV yedijithali, nangona inyuse ukungazinzi kwengxolo, nangona kunjalo ayinayo izibonelelo ezininzi zokuhanjiswa kwedatha yepakethe kwaye inokubandezeleka kwinqanaba lefiziksi, kodwa ayinakubuyiselwa ngesicelo kwakhona.
Ukuze umqondiso udluliselwe kumgama obalulekileyo, umgangatho ophezulu uyafuneka, ngoko ke ii-amplifiers ziyimfuneko kwikhonkco. Isignali ye-optical kwiinkqubo ze-CATV ikhuliswe yi-erbium amplifiers (EDFA). Ukusebenza kwesi sixhobo ngumzekelo obalaseleyo wendlela nabuphi na ubuchwephesha obuhambele phambili ngokwaneleyo abubonakali kumlingo. Ngamafutshane: xa umqadi udlula kwifayibha ene-erbium, iimeko zenziwa phantsi kwayo ifotoni nganye yemitha yokuqala idala ii-clones ezimbini ngokwayo. Ezo zixhobo zisetyenziswa kuzo zonke iinkqubo zothumelo lwedatha kumgama omde. Ngokuqinisekileyo azibizi. Ke ngoko, kwiimeko apho ukukhulisa umqondiso ngesixa esibalulekileyo kungafunekiyo kwaye akukho mfuneko zingqongqo zobungakanani bengxolo, kusetyenziswa ukuhlaziya umqondiso:
Esi sixhobo, njengoko sinokubonwa kumzobo webhloko, senza uguqulo lwesiginali ephindwe kabini phakathi kwemidiya ye-optical kunye neyombane. Olu luyilo lukuvumela ukuba utshintshe ubude bomqondiso ukuba kuyimfuneko.
Ukuguqulwa okunjalo njengokwandiswa komqondiso kunye nokuhlaziywa kwakhona ayimfuneko kungekuphela nje ukubuyisela i-kilometer-long attenuation yentambo. Eyona lahleko inkulu iyenzeka xa umqondiso wahlulwe phakathi kwamasebe womnatha. Ulwahlulo lwenziwa ngokusebenzisa izixhobo zokwenziwa, ezinokuthi, kuxhomekeke kwimfuno, zinokuba nenani elahlukileyo leempompo, kwaye ziyakwazi ukwahlula isignali nokuba i-symmetrically okanye hayi.
Ngaphakathi, isahluli sinokuba yimicu edityaniswe ngamacala, okanye ifakwe, njengeengoma kwibhodi yesekethe eprintiweyo. Ukuya nzulu, ndincoma amanqaku malunga ΠΈ abahluli ngokufanelekileyo. Okukhona isahluli sinazo iimpompo ezininzi, kokukhona sikwazisa ngakumbi kuphawu.
Ukuba songeza izihluzi kwi-splitter ukwahlula imiqadi enamaza ahlukeneyo, ngoko sinokuhambisa imiqondiso emibini ngexesha elinye kwifiber enye.
Le yinguqulelo elula ye-optical multiplexing - FWDM. Ngokudibanisa i-CATV kunye nezixhobo ze-Intanethi kwi-TV kunye ne-Express inputs, ngokulandelanayo, siya kufumana isignali edibeneyo kwi-COM pin eqhelekileyo, enokuthi idluliselwe kwi-fiber enye, kwaye kwelinye icala inokwahlulwa phakathi kommkeli optical kunye iswitshi, umzekelo. Oku kwenzeka ngendlela efanayo njengoko umnyama uvela ekukhanyeni okumhlophe kwiprism yeglasi.
Ngenjongo ye-backup yesignali ye-optical, ukongeza kwi-optical receivers kunye namagalelo amabini, endibhale ngawo i-relay ye-electromechanical ingasetyenziselwa, enokuthi itshintshe ukusuka komnye umthombo ukuya komnye ngokwemilinganiselo yesignali echaziweyo.
Ukuba ifayibha enye iyancipha, isixhobo siya kuzitshintshela kwenye. Ixesha lokutshintsha lingaphantsi kwesekondi, ngoko kumbhalisi libukeka libi kakhulu njengesandla sezinto zakudala kumfanekiso weTV wedijithali, othi shwaka kwangoko ngesakhelo esilandelayo.
umthombo: www.habr.com