Njengoko sisazi, ukususela ngeminyaka yoo-1990, itekhnoloji ye-WDM WDM ibisetyenziswa kwiikhonkco ze-fiber-optic ezihamba ixesha elide ezingamakhulu okanye amawaka eekhilomitha. Kwiingingqi ezininzi zelizwe, iziseko zefayibha zezona zinto zibiza kakhulu, ngelixa ixabiso lezinto ze-transceiver liphantsi kakhulu.
Nangona kunjalo, ngenxa yokwanda kwamanani edatha kwiinethiwekhi ezifana ne-5G, itekhnoloji ye-WDM iya ibaluleke ngakumbi nakwiikhonkco ze-short-haul, ezisetyenziswa ngobuninzi obukhulu kwaye ngenxa yoko zinovelwano ngakumbi kwixabiso kunye nobukhulu beendibano ze-transceiver.
Okwangoku, ezi networks zisaxhomekeke kumawaka ee-optical fibers ze-single-mode ezithunyelwa ngaxeshanye ngeetshaneli ze-space division multiplexing, kunye namazinga edatha aphantsi kakhulu angama-Gbit/s ambalwa (800G) ngetshaneli nganye, kunye nenani elincinci lezicelo ezinokwenzeka kwi-T-class.
Nangona kunjalo, kwixesha elizayo elibonakalayo, ingcamango yokudibanisa indawo eqhelekileyo iza kufikelela kwimida yokulinganisa kwayo, kwaye kuya kufuneka incediswe yi-spectral parallelisation yemithombo yedatha kwifayibha nganye ukuze kugcinwe ukunyuka okuqhubekayo kwamazinga edatha. Oku kunokuvula indawo entsha yesicelo setekhnoloji ye-WDM, apho ukulinganisa okuphezulu ngokwenani leetshaneli kunye nesantya sedatha kubalulekile.
Kule meko,ijenereyitha ye-optical frequency comb (FCG)Idlala indima ephambili njengomthombo wokukhanya oqinileyo, ozinzileyo, nonobude obuziimitha ezininzi onokubonelela ngenani elikhulu lee-optical carriers ezichazwe kakuhle. Ukongeza, inzuzo ebaluleke kakhulu yee-optical frequency combs kukuba imigca ye-comb ilingana ngokwendalo kwi-frequency, ngaloo ndlela ikhulula imfuneko yee-inter-channel guard bands kwaye iphephe ulawulo lwe-frequency oluya kufuneka kumgca omnye kwiskimu sesiqhelo kusetyenziswa uluhlu lwee-DFB lasers.
Kubalulekile ukuqaphela ukuba ezi nzuzo azisebenzi kuphela kwiitransmitter zeWDM kodwa nakwiireceivers zazo, apho ii-discrete local oscillator (LO) arrays zinokuthathelwa indawo yi-single comb generator. Ukusetyenziswa kwee-LO comb generators kwenza kube lula ngakumbi ukucutshungulwa kwesignali yedijithali kwiitshaneli zeWDM, ngaloo ndlela kunciphisa ubunzima be-receiver kunye nokwandisa ukunyamezela ingxolo yesigaba.
Ukongeza, ukusetyenziswa kwezibonakaliso ze-LO comb kunye ne-phase-locking ukuze kufumaneke ulwamkelo oluhambelanayo kwenza kube nokwenzeka ukwakha kwakhona i-time-domain waveform yesignali yonke ye-WDM, ngaloo ndlela ihlawulela ukuphazamiseka okubangelwa kukungangqamani kokukhanya kwifayibha yokudlulisa. Ukongeza kwezi zibonelelo zengqiqo zokudluliselwa kwesignali esekelwe kwi-comb, ubungakanani obuncinci kunye nemveliso yobuninzi engabizi kakhulu nazo zibalulekile kwii-transceivers ze-WDM zexesha elizayo.
Ngoko ke, phakathi kweengcamango ezahlukeneyo zokuvelisa isignali ye-comb, izixhobo zesikali se-chip zinomdla kakhulu. Xa zidityaniswe neesekethe ezidityanisiweyo ze-photonic ezikwaziyo ukulinganiswa kakhulu ukuze kuguqulwe isignali yedatha, ukuphinda-phinda, ukuhambisa kunye nokwamkela, ezi zixhobo zinokuba ngundoqo kwii-transceivers ze-WDM ezincinci nezisebenza kakuhle ezinokwenziwa ngobuninzi ngexabiso eliphantsi, ezinomthamo wokudlulisa ofikelela kwishumi le-Tbit/s kwifayibha nganye.
Lo mfanekiso ulandelayo ubonisa umfanekiso we-WDM transmitter esebenzisa i-optical frequency comb FCG njengomthombo wokukhanya we-multi-wavelength. I-FCG comb signal yahlulwe kuqala kwi-demultiplexer (DEMUX) ize ingene kwi-EOM electro-optical modulator. Ngale ndlela, i-signal iphantsi kwe-QAM quadrature amplitude modulation ephucukileyo ukuze kubekho ukusebenza kakuhle kwe-spectral (SE).
Xa i-transmitter iphuma, iitshaneli ziphinda zihlanganiswe kwi-multiplexer (MUX) kwaye iisignali ze-WDM zidluliselwa kwi-fiber ye-single mode. Kwisiphelo sokwamkela, i-wavelength division multiplexing receiver (WDM Rx), isebenzisa i-LO local oscillator ye-2nd FCG ukuze ifumane i-multiwavelength coherent detection. Iitshaneli ze-input WDM signals zahlulwe yi-demultiplexer kwaye zondliwa kwi-coherent receiver array (Coh. Rx). apho i-demultiplexing frequency ye-local oscillator LO isetyenziswa njengereferensi yesigaba kwi-coherent receiver nganye. Ukusebenza kwee-WDM link ezinjalo ngokucacileyo kuxhomekeke kakhulu kwi-baseless coherent signal generator, ngakumbi ububanzi bomgca we-optical kunye namandla e-optical ngomgca we-comb.
Kakade ke, iteknoloji ye-optical frequency comb isesekwinqanaba lophuhliso, kwaye iimeko zokusetyenziswa kwayo kunye nobukhulu bemarike zincinci kakhulu. Ukuba ingakwazi ukoyisa imiqobo yobuchwephesha, inciphise iindleko kwaye iphucule ukuthembeka, kuya kuba nokwenzeka ukufezekisa usetyenziso lwenqanaba lesikali kuthumelo lwe-optical.
Ixesha leposi: Novemba-21-2024