Njengoba sazi, kusukela ngawo-1990, ubuchwepheshe be-WDM WDM busetshenziswe ekuxhumaneni kwe-fibre-optic okuhamba ibanga elide okungamakhilomitha angamakhulu noma ngisho nezinkulungwane. Ezifundeni eziningi zezwe, ingqalasizinda ye-fibre iyimpahla yayo ebiza kakhulu, kanti izindleko zezingxenye ze-transceiver ziphansi kakhulu.
Kodwa-ke, ngokwanda kwamazinga edatha kumanethiwekhi afana ne-5G, ubuchwepheshe be-WDM buya ngokuya bubaluleke kakhulu nasezinxhumanisweni zokuthutha isikhashana, ezisetshenziswa ngamanani amakhulu kakhulu futhi ngenxa yalokho zizwela kakhulu izindleko nosayizi wama-transceiver assemblies.
Njengamanje, lawa manethiwekhi asathembele ezinkulungwaneni zemicu ye-optical yemodi eyodwa edluliselwa ngokuhambisana ngeziteshi zokuhlukanisa isikhala, ngamazinga edatha aphansi kakhulu angama-Gbit/s angamakhulu ambalwa (800G) ngesiteshi ngasinye, kanye nenani elincane lezinhlelo zokusebenza ezingaba khona ku-T-class.
Kodwa-ke, esikhathini esizayo esibonakalayo, umqondo wokulinganisa indawo okuvamile uzofinyelela imingcele yokulinganisa kwawo, futhi kuzodingeka uhambisane nokulinganisa kwe-spectral kwemifudlana yedatha ku-fiber ngayinye ukuze kugcinwe ukwanda okwengeziwe kwamazinga edatha. Lokhu kungavula isikhala esisha ngokuphelele sohlelo lokusebenza lobuchwepheshe be-WDM, lapho ukulinganisa okuphezulu ngokwenani leziteshi kanye nesilinganiso sedatha kubalulekile.
Kulesi simo,ijeneretha ye-optical frequency comb (FCG)idlala indima ebalulekile njengomthombo wokukhanya ohlangene, oqinile, onamagagasi amaningi onganikeza inani elikhulu labathwali be-optical abachazwe kahle. Ngaphezu kwalokho, inzuzo ebaluleke kakhulu yama-optical frequency combs ukuthi imigqa ye-comb ilingana ngokujwayelekile ngemvamisa, ngaleyo ndlela ikhulule isidingo sama-inter-channel guard bands futhi igweme ukulawulwa kwemvamisa okungadingeka kumugqa owodwa ohlelweni olujwayelekile olusebenzisa i-DFB lasers ehlukahlukene.
Kubalulekile ukuqaphela ukuthi lezi zinzuzo azisebenzi kuma-transmitter e-WDM kuphela kodwa nakuma-receiver awo, lapho ama-array e-discrete local oscillator (LO) angashintshwa khona yi-single comb generator. Ukusetshenziswa kwama-LO comb generator kwenza kube lula ukucubungula isignali yedijithali yeziteshi ze-WDM, ngaleyo ndlela kunciphisa ubunzima be-receiver futhi kwandise ukubekezelelana komsindo wesigaba.
Ngaphezu kwalokho, ukusetshenziswa kwezimpawu ze-LO comb ezine-phase-locking ukuze kutholakale ukwamukelwa okuhlangene okufanayo kwenza kube nokwenzeka ukwakha kabusha i-waveform yesizinda sesikhathi sayo yonke i-WDM signal, ngaleyo ndlela kunxephezele ukukhubazeka okubangelwa ukungalungi kokukhanya ku-fiber yokudlulisa. Ngaphezu kwalezi zinzuzo zomqondo zokudluliselwa kwesignali okusekelwe ku-comb, usayizi omncane kanye nokukhiqizwa kwesisindo okungabizi nakho kubalulekile kuma-transceivers e-WDM esikhathi esizayo.
Ngakho-ke, phakathi kwemibono eyahlukene yokukhiqiza isignali yekamu, amadivayisi e-chip-scale athakazelisa kakhulu. Uma ehlanganiswa namasekethe ahlanganisiwe e-photonic anwebeka kakhulu okushintshashintsha isignali yedatha, ukuphindaphinda, ukuhambisa kanye nokwamukela, amadivayisi anjalo angaba yisihluthulelo sama-transceivers e-WDM aqinile futhi asebenza kahle kakhulu angakhiwa ngobuningi obukhulu ngezindleko eziphansi, anamakhono okudlulisa afinyelela kumashumi e-Tbit/s ngefayibha ngayinye.
Isithombe esilandelayo sibonisa umdwebo we-WDM transmitter esebenzisa i-optical frequency comb FCG njengomthombo wokukhanya we-multi-wavelength. Isignali ye-FCG comb ihlukaniswa kuqala ku-demultiplexer (DEMUX) bese ingena ku-EOM electro-optical modulator. Ngale ndlela, isignali ifakwa ku-advanced QAM quadrature amplitude modulation ukuze kube nokusebenza kahle kwe-spectral (SE).
Ekuphumeni kwe-transmitter, iziteshi zihlanganiswa kabusha ku-multiplexer (MUX) kanti izibonakaliso ze-WDM zidluliselwa nge-fiber yemodi eyodwa. Ekupheleni kokwamukela, i-wavelength division multiplexing receiver (WDM Rx), isebenzisa i-LO local oscillator ye-FCG yesi-2 ukuthola i-multiwavelength coherent. Iziteshi zezibonakaliso ze-WDM zokufaka zihlukaniswa yi-demultiplexer bese ziphakelwa ku-coherent receiver array (Coh. Rx). lapho imvamisa ye-demultiplexing ye-local oscillator LO isetshenziswa njengereferensi yesigaba se-coherent receiver ngayinye. Ukusebenza kwezixhumanisi ezinjalo ze-WDM ngokusobala kuncike kakhulu ku-generator yesignali ye-comb engaphansi, ikakhulukazi ububanzi bomugqa we-optical kanye namandla e-optical ngomugqa we-comb.
Vele, ubuchwepheshe be-optical frequency comb busesesigabeni sokuthuthuka, futhi izimo zokusetshenziswa kwayo kanye nosayizi wemakethe kuncane kakhulu. Uma inganqoba izithiyo zobuchwepheshe, inciphise izindleko futhi ithuthukise ukuthembeka, khona-ke kuzokwazi ukufeza izinhlelo zokusebenza zezinga lesikali ekudlulisweni kwe-optical.
Isikhathi sokuthunyelwe: Novemba-21-2024