Iqembu abacwaningi baseTsinghua University (Chinese) has wakha indlela yokulalela izingxoxo ekamelweni equkethe intambo yokubona, ngokwesibonelo, esetshenziswa ukuxhuma ku-inthanethi.
Ukudlidliza komsindo kudala ukwehla kwengcindezi emoyeni, ngakho-ke ama-microvibrations akhiqizwa kukhebula le-optical, elilungiswa ngegagasi lokukhanya elidluliselwa ngekhebula. Ukuhlanekezela okuwumphumela kungahlaziywa ebangeni elikhulu ngokwanele kusetshenziswa i-Mach-Zehnder laser interferometer.
Eminyakeni yamuva, amanethiwekhi e-fiber optic asakazwa kabanzi emhlabeni wonke, angagcini nje ngokuhambisa idatha, kodwa futhi anikeze ithuba lokuthola ulwazi olwengeziwe.
Lezi zinhlelo zokusebenza zamanethiwekhi e-fiber optic, okuhlanganisa ukutholwa kokuzamazama komhlaba, ithrafikhi yasemadolobheni ukuqapha ukugeleza [7-10], ukuhlola izakhiwo ze-geological ezingaphansi komhlaba, njll., babe imithelela emihle ekukhiqizeni nasezimpilweni zabantu. Nokho, futhi kuletha amandla athile nezindaba zokuphepha, okufanele zibhekwe ngokucophelela.
Phakathi nokuhlolwa, kwakungenzeka ukuqaphela ngokugcwele umsindo yenkulumo phambi kocezu oluvuliwe lwentambo yokubona (FTTH) amamitha amathathu phambi kwemodemu.
Isilinganiso senziwe ebangeni elingu-1,1 km ukusuka ekugcineni kwekhebula elisegunjini lokulalela. Ibanga lokulalela kanye nekhono lokuhlunga ukuthikamezeka lihambisana nobude bekhebula ekamelweni, okungukuthi, njengoba ubude bekhebula ekamelweni buyancipha, nebanga eliphakeme lapho ulalela khona liyancipha.
Kuboniswa ukuthi ukutholwa nokubuyiselwa kwesignali yomsindo kumanethiwekhi okuxhumana okukhanya kungenziwa ngokucashile, kungabonakali kumlaleli futhi ngaphandle kokwephula imisebenzi yokuxhumana esetshenziswayo. Ukuze ungene ngobuhlakani esiteshini sokuxhumana, abacwaningi basebenzisa i-division multiplexer of wavelength (WDM, Wavelength Division Multiplexer). Ukwehliswa okwengeziwe kwezinga lomsindo wangemuva kufinyelelwa ngokulinganisa izingalo ze-interferometer.
Imicu yokubona iyazwela ezinhlobonhlobo zengcindezi ye-ambient, engase ibe khona
ngamagagasi e-acoustic. Amadivayisi asuselwe kulesi sici asetshenziswa kakhulu ekutholeni umsindo, njengama-fiber optic hydrophone. Ngokusekelwe kumodi yamanje yokuthunyelwa kwe-fiber-to-the-home (FTTH), i-tail fibre efika kumamitha ambalwa izofakwa ezindlini zezakhamuzi. Kule micu yangaphakathi, amasignali omsindo ayengashintshwa egagasi lokukhanya elidluliselwa kulo, okuvumela abanye ukuba balalele futhi bawathole ezindaweni ezikude eduze kwe-fiber link.
Phakathi naleso sikhathi, umsebenzi wokuqala wokuxhumana we-fiber ngeke uthinteke ngokusetshenziswa kwe-wavelength division multiplexer (WDM). Ngakho-ke, ukulalela kungenziwa ngasese. Kulesi sihloko, siphakamisa uhlelo lwe-espionage olusebenzisa i-fiber optics yasendlini kanye
fakazele lab. Uhlelo lusekelwe ku-Mach-Zehnder heterodyne
i-interferometer. Sihlanganise isistimu yokulalela nesixhumanisi se-fiber optic esingu-1,1 kilometer
kude nethagethi yokulalela, amazwi enkulumo yomuntu evamile (50 ~ 80 dB) angaba
ivalwe ngefayibha yomsila yangaphakathi engamamitha angu-3. Umsindo wesistimu namandla okulalela ayahlaziywa. Okokugcina, sixoxa ngezinyathelo zokugwema ingozi yokulalela okungekho emthethweni.
izinyathelo zokuphikisa ukulalela ngokuyimfihlo hlanganisa ukunciphisa ubude bekhebula le-optical ekamelweni bese ubeka ikhebula eziteshini zekhebula eziqinile. Ungasebenzisa futhi izixhumi ezibonakalayo ze-APC (I-Angled Physical Connection) ine-engeli esikhundleni sezixhumi eziyisicaba (i-PC) ukuze kuncishiswe ukusebenza kahle kokulalela. Kubakhiqizi bezintambo ze-fiber optic, kunconywa ukusebenzisa izinto ezine-modulus ephezulu yokunwebeka, njengensimbi nengilazi, njenge-fiber cladding.
Okokugcina, kulabo abathanda ukwazi kabanzi ngayo, bangabheka imininingwane yophenyo Kulesi sixhumanisi esilandelayo.