Uhlobo olutsha lwe-terahertz multiplexer luphinde kabini umthamo wedatha kwaye lwaphucula kakhulu unxibelelwano lwe-6G nge-bandwidth engakaze ibonwe ngaphambili kunye nokulahleka kwedatha okuphantsi.
Abaphandi bazise i-multiplexer ye-terahertz ebanzi kakhulu ephinda kabini umthamo wedatha kwaye izisa inkqubela phambili entsha kwi-6G nangaphezulu. (Umthombo womfanekiso: Getty Images)
Unxibelelwano olungenazingcingo lwesizukulwana esilandelayo, olumelwe yitekhnoloji ye-terahertz, luthembisa ukuguqula ukuhanjiswa kwedatha.
Ezi nkqubo zisebenza kwiifrikhwensi ze-terahertz, zibonelela nge-bandwidth engenakuthelekiswa nanto yokudlulisa idatha ngokukhawuleza kakhulu kunye nonxibelelwano. Nangona kunjalo, ukuze kufezekiswe ngokupheleleyo oku, imingeni ebalulekileyo yobuchwephesha kufuneka yoyiswe, ngakumbi ekulawuleni nasekusebenziseni ngempumelelo i-spectrum ekhoyo.
Uphuhliso oluphambili luye lwajongana nalo mceli mngeni: i-ultra-wideband integrated terahertz polarization (de)multiplexer yokuqala eyenziwe kwiqonga le-silicon elingenayo i-substrate.
Olu yilo lutsha lujolise kwi-sub-terahertz J band (220-330 GHz) kwaye lujolise ekuguquleni unxibelelwano lwe-6G nangaphezulu. Esi sixhobo siphinda kabini umthamo wedatha ngelixa sigcina izinga lokulahleka kwedatha liphantsi, sivula indlela yeenethiwekhi ezingenazingcingo ezisebenza kakuhle nezithembekileyo.
Iqela eliphambili kweli nqanaba liquka uNjingalwazi Withawat Withayachumnankul ovela kwiSikolo soBunjineli boMbane nooMatshini kwiYunivesithi yaseAdelaide, uGqr. Weijie Gao, ngoku ongumphandi osemva kwezifundo kwiYunivesithi yaseOsaka, kunye noNjingalwazi Masayuki Fujita.
UNjingalwazi uWithayachumnankul uthe, "I-polarization multiplexer ecetywayo ivumela ukuba imijelo yedatha emininzi idluliselwe ngaxeshanye ngaphakathi kwibhendi efanayo yefrikhwensi, nto leyo ephindaphinda amandla edatha ngokukuko." I-bandwidth ehambelanayo ephunyezwe sisixhobo ayinakuthelekiswa nanto kulo naliphi na uluhlu lwefrikhwensi, nto leyo ebonisa ukutsiba okukhulu kwi-multiplexers ezidibeneyo.
Ii-multiplexers ze-polarization zibalulekile kunxibelelwano lwanamhlanje njengoko zivumela imiqondiso emininzi ukuba yabelane ngebhendi efanayo yefrikhwensi, nto leyo ephucula kakhulu umthamo wetshaneli.
Esi sixhobo sitsha sifezekisa oku ngokusebenzisa ii-couplers ezibhekisa kwicala eliyi-conical kunye ne-anisotropic effective medium cladding. Ezi zixhobo zonyusa i-polarization birefringence, nto leyo ekhokelela kwi-high polarization extinction ratio (PER) kunye ne-wide bandwidth—iimpawu eziphambili zeenkqubo zonxibelelwano ze-terahertz ezisebenzayo.
Ngokungafaniyo noyilo lwendabuko oluxhomekeke kwiindlela ezintsonkothileyo nezixhomekeke kumaza angafaniyo, i-multiplexer entsha isebenzisa i-anisotropic cladding enokuxhomekeka kancinci kumaza. Le ndlela isebenzisa ngokupheleleyo i-bandwidth eyaneleyo enikezelwa zii-couplers ze-conical.
Isiphumo kukuba i-bandwidth ye-fractional isondele kwi-40%, i-PER ephakathi idlula i-20 dB, kunye nokulahleka okuncinci kokufakelwa okumalunga ne-1 dB. Ezi metrics zokusebenza zidlula kakhulu ezo ze-optical kunye ne-microwave designs ezikhoyo, ezihlala zinengxaki ye-bandwidth encinci kunye nokulahleka okuphezulu.
Umsebenzi weqela lophando awupheleli nje ekuphuculeni ukusebenza kakuhle kweenkqubo ze-terahertz kodwa ukwabeka isiseko sexesha elitsha kunxibelelwano olungenazingcingo. UGqr. Gao uqaphele ukuba, "Olu tshintsho luphambili ekuvuleni amandla onxibelelwano lwe-terahertz." Izicelo ziquka ukusasazwa kwevidiyo okunentsingiselo ephezulu, i-augmented reality, kunye neenethiwekhi zeselula zesizukulwana esilandelayo ezifana ne-6G.
Izisombululo zolawulo lwe-terahertz polarization zemveli, ezifana nee-orthogonal mode transducers (OMTs) ezisekelwe kwii-rectangular metal waveguides, zijongene nemida ebalulekileyo. Ii-metal waveguides zifumana ilahleko ezikhulayo ze-ohmic kumaza aphezulu, kwaye iinkqubo zazo zokuvelisa ziyinkimbinkimbi ngenxa yeemfuno ezingqongqo zejometri.
Ii-optical polarization multiplexers, kuquka ezo zisebenzisa ii-interferometers zeMach-Zehnder okanye iikristale zephotonic, zibonelela ngokuhlanganiswa okungcono kunye nokulahlekelwa okuphantsi kodwa zihlala zifuna urhwebo phakathi kwe-bandwidth, ubuncinci, kunye nobunzima bokuvelisa.
Ii-couplers ezikhokelayo zisetyenziswa kakhulu kwiinkqubo ze-optical kwaye zifuna i-birefringence enamandla ye-polarization ukuze zifikelele kubukhulu obuncinci kunye ne-PER ephezulu. Nangona kunjalo, zithintelwe yi-bandwidth encinci kunye nobuthathaka kwiingxaki zokwenziwa.
I-multiplexer entsha idibanisa iingenelo ze-couplers ezibhekisa kwicala eliyi-conical kunye ne-medium cladding esebenzayo, yoyisa le mida. I-anisotropic cladding ibonisa i-birefringence ebalulekileyo, iqinisekisa i-PER ephezulu kwi-bandwidth ebanzi. Lo mgaqo woyilo uphawula ukuphambuka kwiindlela zemveli, ukubonelela ngesisombululo esinokukhula nesisebenzayo sokudibanisa i-terahertz.
Ukuqinisekiswa kovavanyo lwe-multiplexer kuqinisekisile ukusebenza kwayo okugqwesileyo. Esi sixhobo sisebenza ngokufanelekileyo kuluhlu lwe-225-330 GHz, sifikelela kwi-bandwidth ye-fractional ye-37.8% ngelixa sigcina i-PER engaphezulu kwe-20 dB. Ubungakanani bayo obuncinci kunye nokuhambelana kwayo neenkqubo zokuvelisa eziqhelekileyo kuyenza ifaneleke kwimveliso yobuninzi.
UGqr. Gao uthe, "Olu tshintsho alupheleli nje ekuphuculeni ukusebenza kakuhle kweenkqubo zonxibelelwano ze-terahertz kodwa lukwavula indlela yeenethiwekhi ezingenazingcingo ezinamandla nezithembekileyo."
Ukusetyenziswa okunokwenzeka kobu buchwepheshe kudlulela ngaphaya kweenkqubo zonxibelelwano. Ngokuphucula ukusetyenziswa kwe-spectrum, i-multiplexer inokuqhuba inkqubela phambili kwiinkalo ezifana ne-radar, i-imaging, kunye ne-Intanethi yezinto. "Kwiminyaka elishumi, silindele ukuba obu buchwepheshe be-terahertz bumkelwe ngokubanzi kwaye budityaniswe kumashishini ahlukeneyo," utshilo uNjingalwazi uWithayachumnankul.
I-multiplexer ingadibaniswa ngokungenamthungo nezixhobo zangaphambili zokulungisa imisebe eziphuhliswe liqela, nto leyo evumela imisebenzi yonxibelelwano ephucukileyo kwiqonga elidibeneyo. Oku kuhambelana kugxininisa ukuguquguquka kunye nokuguquguquka kweqonga elisebenzayo le-dielectric waveguide eliphakathi.
Iziphumo zophando zeqela zipapashwe kwijenali iLaser & Photonic Reviews, zigxininisa ukubaluleka kwazo ekuphuculeni ubuchwepheshe be-photonic terahertz. UNjingalwazi Fujita uthe, "Ngokoyisa imiqobo ebalulekileyo yobugcisa, olu tshintsho kulindeleke ukuba luvuselele umdla kunye nomsebenzi wophando kweli candelo."
Abaphandi balindele ukuba umsebenzi wabo uza kukhuthaza usetyenziso olutsha kunye nophuculo olongezelelekileyo lwetekhnoloji kwiminyaka ezayo, ekugqibeleni oku kukhokelela kwiiprototypes zorhwebo kunye neemveliso.
Le multiplexer imele inyathelo elibalulekileyo ekuvuleni amandla onxibelelwano lwe-terahertz. Ibeka umgangatho omtsha wezixhobo ze-terahertz ezidibeneyo ngeemilinganiselo zayo zokusebenza ezingazange zibonwe ngaphambili.
Njengoko imfuno yothungelwano lonxibelelwano olukhawulezayo nolunamandla aphezulu iqhubeka nokukhula, olu tshintsho luya kudlala indima ebalulekileyo ekubumbeni ikamva lobuchwepheshe obungenazingcingo.
Ixesha leposi: Disemba-16-2024