Siyazi ukuba ukususela ngeminyaka yoo-1990, itekhnoloji ye-WDM wavelength division multiplexing ibisetyenziswa kwiikhonkco ze-fiber optic ezikude ezigubungela amakhulu okanye amawaka eekhilomitha. Kumazwe amaninzi nakwiindawo, iziseko ze-fiber optic zezona zinto zibiza kakhulu, ngelixa ixabiso lezinto ze-transceiver liphantsi kakhulu.
Nangona kunjalo, ngenxa yokukhula okukhulu kwamazinga okudluliselwa kwedatha yenethiwekhi njenge-5G, itekhnoloji ye-WDM iye yabaluleka ngakumbi kwiikhonkco zomgama omfutshane, kwaye umthamo wokusasazwa kweekhonkco ezimfutshane mkhulu kakhulu, okwenza ixabiso kunye nobukhulu bezinto ze-transceiver zibe buthathaka ngakumbi.
Okwangoku, ezi network zisaxhomekeke kumawaka eefayibha ze-optical ze-single-mode ukuze zidlulisele idatha ngendlela efanayo ngokusebenzisa iitshaneli ze-multiplexing zokwahlulahlula isithuba, kwaye izinga ledatha yetshaneli nganye liphantsi kakhulu, ubukhulu becala lingamakhulu ambalwa e-Gbit/s (800G). I-T-level isenokuba nezicelo ezilinganiselweyo.
Kodwa kwixesha elizayo elibonakalayo, ingcamango yokufana kweendawo eziqhelekileyo iza kufikelela kumda wayo wokwahluka, kwaye kufuneka yongezwe ngokufana kwe-spectrum yemithombo yedatha kwifayibha nganye ukugcina uphuculo oluthe kratya kumazinga edatha. Oku kunokuvula indawo entsha yesicelo setekhnoloji yokwahlulahlula ubude be-wavelength, apho ukulingana okuphezulu kwenani letshaneli kunye nesantya sedatha kubalulekile.
Kule meko, ijenereyitha ye-frequency comb (FCG), njengomthombo wokukhanya we-compact ne-fixed multi wavelength light, inokubonelela ngenani elikhulu lee-optical carriers ezichazwe kakuhle, ngaloo ndlela idlala indima ebalulekileyo. Ukongeza, inzuzo ebaluleke kakhulu ye-optical frequency comb kukuba i-comb lines ilingana kakhulu kwi-frequency, nto leyo enokunciphisa iimfuno ze-inter channel guard bands kwaye iphephe ulawulo lwe-frequency olufunekayo kwi-single lines kwi-traditional schemes esebenzisa i-DFB laser arrays.
Kufuneka kuqatshelwe ukuba ezi nzuzo azisebenzi kuphela kwi-transmitter ye-wavelength division multiplexing, kodwa nakwi-receiver yayo, apho i-discrete local oscillator (LO) array inokutshintshwa yi-single comb generator. Ukusetyenziswa kwee-LO comb generators kunokwenza kube lula ngakumbi ukucutshungulwa kwesignali yedijithali kwiitshaneli ze-wavelength division multiplexing, ngaloo ndlela kunciphisa ubunzima be-receiver kwaye kuphuculwe ukunyamezela ingxolo yesigaba.
Ukongeza, ukusebenzisa imiqondiso ye-LO comb enomsebenzi we-phase-locked ukuze ufumane i-coherent reception ehambelanayo kunokuphinda kwakhiwe i-time-domain waveform yesignali ye-multiplexing ye-wavelength division yonke, ngaloo ndlela kuhlawulelwa umonakalo obangelwe kukungangqamani kwe-optical ye-transmission fiber. Ukongeza kwiingenelo zengqiqo ezisekelwe ekudlulisweni kwesignali ye-comb, ubungakanani obuncinci kunye nemveliso enkulu esebenza kakuhle ngokwezoqoqosho nazo zizinto ezibalulekileyo kwii-transceivers ze-multiplexing ze-wavelength division kwixesha elizayo.
Ke ngoko, phakathi kweengcamango ezahlukeneyo zokuvelisa isignali ye-comb, izixhobo zezinga le-chip ziphawuleka kakhulu. Xa zidityaniswe neesekethe ezidityanisiweyo ze-photonic ezikwaziyo ukulinganiswa kwesignali yedatha, ukuphinda-phinda, ukuhambisa, kunye nokwamkela, ezi zixhobo zinokuba ngundoqo kwii-transceivers ze-multiplexing ezidibeneyo nezisebenzayo zokwahlula-hlula ubude be-wavelength ezinokwenziwa ngobuninzi obukhulu ngexabiso eliphantsi, ezinomthamo wokudlulisela wamashumi e-Tbit/s ngefayibha nganye.
Kwisiphumo sesiphelo sokuthumela, itshaneli nganye idityaniswe kwakhona nge-multiplexer (MUX), kwaye isignali ye-multiplexing division wavelength division idluliselwa ngefayibha yemowudi enye. Kwisiphelo sokwamkela, i-wavelength division multiplexing receiver (WDM Rx) isebenzisa i-LO local oscillator ye-FCG yesibini ukuze ifumane ukuphazamiseka kwe-multi wavelength. Itshaneli yesignali ye-input wavelength division multiplexing yahlulwe yi-demultiplexer ize ithunyelwe kwi-coherent receiver array (Coh. Rx). Phakathi kwazo, i-demultiplexing frequency ye-local oscillator LO isetyenziswa njengesalathiso sesigaba se-coherent receiver nganye. Ukusebenza kwale wavelength division multiplexing link ngokucacileyo kuxhomekeke kakhulu kwi-basic comb signal generator, ingakumbi ububanzi bokukhanya kunye namandla okukhanya omgca ngamnye we-comb.
Kakade ke, iteknoloji ye-optical frequency comb isesekwinqanaba lophuhliso, kwaye iimeko zokusetyenziswa kwayo kunye nobukhulu bemarike zincinci kakhulu. Ukuba ingakwazi ukoyisa imiqobo yetekhnoloji, inciphise iindleko, kwaye iphucule ukuthembeka, inokufikelela kwizicelo zenqanaba lesikali kwi-optical transmission.
Ixesha leposi: Disemba-19-2024