Bavelisa indlela "yokuphulaphula" ngentambo yokukhanya

Iqela le abaphandi kwiYunivesithi yaseTsinghua (isiTshayina) unayo uvelise ubuchule bokuphulaphula iincoko kwigumbi equlethe intambo yokukhanya, umzekelo, esetyenziselwa ukuqhagamshela kwi-Intanethi.

Ukungcangcazela kwesandi kubangela ukuhla koxinzelelo emoyeni, ngoko ke ii-microvibrations ziveliswa kwintambo ye-optical, imodulated ngamaza okukhanya ahanjiswa ngentambo. Ukuguqulwa okubangelwayo kunokuhlalutywa kumgama omkhulu ngokwaneleyo usebenzisa i-Mach-Zehnder laser interferometer.

Kwiminyaka yakutshanje, i-fiber optic networks isasazwa ngokubanzi kwihlabathi jikelele, engaququzeleli nje ukuhanjiswa kwedatha, kodwa inika ithuba lokufumana ulwazi olongezelelweyo.

Ezi zicelo zothungelwano lwefiber optic, kubandakanywa ukubhaqwa kwenyikima, ukugcwala ezidolophini ukujongwa kokuhamba [7-10], ukuphononongwa kwezakhiwo zejoloji eziphantsi komhlaba, njl., zine iimpembelelo ezintle kwimveliso nakubomi babantu. Nangona kunjalo, kuzisa nesakhono esithile imiba yokhuseleko, ekufuneka iqwalaselwe ngononophelo.

Ngexesha lovavanyo, kwakunokwenzeka ukuqonda ngokupheleleyo isandi yentetho phambi kweqhekeza elivulekileyo lentambo ye-optical (FTTH) iimitha ezintathu phambi kwemodem.

Umlinganiselo wenziwa kumgama we-1,1 km ukusuka ekupheleni kwentambo ebekwe kwigumbi eliphulaphule. Uluhlu lokuphulaphula kunye nokukwazi ukucoca ukuphazamiseka kokuphazamiseka kunye nobude bekhebula kwigumbi, oko kukuthi, njengoko ubude bentambo kwigumbi buyancipha, umgama omkhulu onokuthi uphulaphule nawo uyancipha.

Kuboniswa ukuba ukufunyanwa kunye nokubuyiselwa kwesandi somsindo kwiinethiwekhi zonxibelelwano ze-optical inokuphunyezwa ngokufihlakeleyo, ingabonakali kumphulaphuli kwaye ngaphandle kokwaphula imisebenzi yonxibelelwano esetyenziswayo. Ukutyibilika ngobulumko kumjelo wonxibelelwano, abaphandi basebenzisa i-division multiplexer of wavelength (WDM, Wavelength Division Multiplexer). Ukunciphisa ngakumbi umgangatho wengxolo yangasemva kufezekiswa ngokulinganisa iingalo ze-interferometer.

Iintsinga ze-Optical zinovakalelo kwiiyantlukwano kuxinzelelo lwe-ambient, ezinokubangelwa
ngamaza e-acoustic. Izixhobo ezisekelwe kolu phawu zisetyenziswa kakhulu ekubhaqweni kwesandi, njengefiber optic hydrophones. Ngokusekwe kwimowudi yangoku yefiber-to-the-home (FTTH), ifayibha yomsila ukuya kwiimitha ezininzi iya kufakwa kumakhaya abahlali. Kule micu yangaphakathi, imiqondiso yesandi inokulungelelaniswa kumaza okukhanya athunyelwa apho, nto leyo evumela abanye ukuba baphulaphule baze bazikhuphele kwiindawo ezikude ecaleni konxibelelwano lomsinga. 

Okwangoku, umsebenzi wokuqala wokunxibelelana wefiber awuyi kuchaphazeleka ngokusetyenziswa kwe-wavelength division multiplexer (WDM). Ngoko ke, ukuphulaphula kungenziwa ngokufihlakeleyo. Kweli nqaku, sicebisa iskimu sobuntlola usebenzisa i-fiber optics yangaphakathi kunye
ngqina kwilebhu. Inkqubo isekelwe kwi-Mach-Zehnder heterodyne
i-interferometer. Sidibanise inkqubo yokuphulaphula kwi-1,1 kilometer fiber optic link
kude kwithagethi yokuphulaphula, amazwi entetho eqhelekileyo yomntu (50 ~ 80 dB) anokuba
evesdropped nge-3 yeemitha zomsila womsila wangaphakathi. Ingxolo yenkqubo kunye nesakhono sokuphulaphula siyahlalutywa. Okokugqibela, sixoxa ngamanyathelo okuthintela umngcipheko wokuvalelwa ngokungekho mthethweni.

amanyathelo okuchasa ukuphulaphula ngokufihlakeleyo zibandakanya ukunciphisa ubude bentambo yokukhanya kwigumbi kwaye ubeke intambo kwiitshaneli zentambo eziqinileyo. Ungasebenzisa kwakhona izihlanganisi ze-APC (I-Angled Physical Connection) i-angled endaweni ye-flat end connectors (PC) ukunciphisa ukusebenza kakuhle kokuva. Kubenzi beentambo ze-fiber optic, kucetyiswa ukuba kusetyenziswe izinto ezinemodyuli ephezulu yokuqina, njengentsimbi kunye neglasi, njenge-fiber cladding.

Okokugqibela, kwabo banomdla wokwazi ngakumbi ngayo, banokujongana neenkcukacha zophando Kule khonkco ilandelayo.


Umxholo wenqaku uyabambelela kwimigaqo yethu imigaqo yokuziphatha yokuhlela. Ukuxela impazamo cofa apha.

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