I-bipolar eguquguqukayoimodyuli yesigaba
Kwicandelo lonxibelelwano lwe-optical olukhawulezayo kunye netekhnoloji ye-quantum, ii-modulators zemveli zijongene nemiqobo enzima yokusebenza! Ukungacoceki kakuhle kwesignali, ulawulo lwesigaba olungaguqukiyo, kunye nokusetyenziswa kwamandla aphezulu kakhulu kwenkqubo - ezi ngxaki zithintela uphuhliso lwetekhnoloji.
I-Bipolari-electro-optical phase modulatorinokufikelela kwi-modulation eqhubekayo yamanqanaba amabini yesigaba semiqondiso ye-optical. Zibonisa ukuhlanganiswa okuphezulu, ukulahleka okuphantsi kokufakwa, i-bandwidth ephezulu yokuguquguquka, i-voltage ephantsi ye-half-wave, kunye namandla aphezulu okukhanya. Zisetyenziselwa kakhulu ulawulo lwe-optical chirp kwiinkqubo zonxibelelwano lwe-optical ezikhawulezayo kunye nokuveliswa kwe-embarrassed state kwiinkqubo zokusasazwa kwe-quantum key. Ukuveliswa kwee-sidebands kwiinkqubo ze-ROF kunye nokunciphisa i-stimulated Brillouin scattering (SBS) kwiinkqubo zonxibelelwano lwe-analog optical fiber, phakathi kwezinye iindawo.
Ii-modulator yesigaba se-bipolarifikelela kulawulo oluchanekileyo lwesigaba semiqondiso ye-optical ngokusebenzisa i-two-stage continuous phase modulation, kwaye ngokukodwa ibonisa ixabiso elikhethekileyo kunxibelelwano lwe-optical olukhawulezayo kunye nokusasazwa kwezitshixo ze-quantum.
1. Ukuhlanganiswa okuphezulu kunye nomlinganiselo womonakalo ophezulu: Yamkela uyilo oludibeneyo lwe-monolithic, incinci ngobukhulu, kwaye ixhasa amandla okukhanya anomonakalo omkhulu. Ingahambelana ngokuthe ngqo nemithombo ye-laser enamandla aphezulu kwaye ifanelekile ekuvelisweni ngokufanelekileyo kwee-sidebands ze-millimeter-wave kwiinkqubo ze-ROF (Optical Wireless).
2. Ucinezelo lweChirp kunye nolawulo lweSBS: Kwitransmission ehambelanayo ngesantya esiphezulu, ulungelelwaniso lweuhlengahlengiso lwesigabainokuthintela ngempumelelo ukutshixiza kwemiqondiso ye-optical. Kunxibelelwano lwe-analog optical fiber, ngokuphucula ubunzulu be-phase modulation, isiphumo se-stimulated Brillouin scattering (SBS) sinokuncitshiswa kakhulu, ngaloo ndlela sandise umgama wokudlulisela.
Kwi-quantum key distribution (QKD), imeko edibeneyo yee-photon pairs isebenza njenge-"quantum key" yonxibelelwano olukhuselekileyo - ukuchaneka kokulungiswa kwayo kumisela ngokuthe ngqo ipropathi yesitshixo esingavaliyo. "Ukuguquguquka" kwe-bipolar phase modulator kubonakala kubuchule bayo bokulungisa iiparameter zesigaba ngokuguquguqukayo ukuze zilungelelanise ukuphazamiseka kwendalo kwee-optical fiber links ezahlukeneyo (ezifana notshintsho lobushushu kunye ne-phase drift ebangelwa luxinzelelo loomatshini), ukuqinisekisa ukusebenza kakuhle kwe-example ephezulu yee-example photon pairs. "Uzinzo" lufezekiswa ngolawulo oluchanekileyo lobushushu kunye netekhnoloji ye-phase-locking frequency, ethintela ingxolo yesigaba ngaphantsi komda wengxolo ye-quantum kwaye ithintele ukungafani kwe-quantum states ngexesha lokudluliselwa. Olu phawu lumbini "lokuguquguquka + uzinzo" aluphuculi kuphela izinga lokusasazwa kwe-short-middle kuthungelwano lweendawo zedolophu (ezifana ne-bit error rate engaphantsi kwe-1% ngaphakathi kweekhilomitha ezingama-50), kodwa ikwaxhasa ukuthembeka kwezitshixo kuthungelwano olude kuthungelwano lwe-intercity (ezifana neekhilomitha ezingaphezu kwekhulu kuzo zonke izixeko), lube yinxalenye engundoqo yokwakha inethiwekhi yonxibelelwano ye-quantum "ekhuselekileyo ngokupheleleyo".
Ixesha leposi: Julayi-22-2025