Siyazi ukuthi kusukela ngawo-1990, ubuchwepheshe be-WDM wavelength division multiplexing busetshenziswe ekuxhumaneni kwe-fiber optic okude okuthatha amakhulu noma ngisho nezinkulungwane zamakhilomitha. Kwamanye amazwe nezifunda eziningi, ingqalasizinda ye-fiber optic iyimpahla yabo ebiza kakhulu, kuyilapho izindleko zezingxenye ze-transceiver ziphansi kakhulu.
Kodwa-ke, ngokukhula okukhulu kwamazinga okudlulisa idatha yenethiwekhi njenge-5G, ubuchwepheshe be-WDM buye babaluleka kakhulu ekuxhumaneni okude, futhi inani lokufakwa kwezixhumanisi ezimfushane likhulu kakhulu, okwenza izindleko nosayizi wezingxenye ze-transceiver kube bucayi kakhulu.
Njengamanje, lawa manethiwekhi asathembele ezinkulungwaneni zemicu ye-optical yemodi eyodwa yokudlulisa ngokuhlanganyela ngeziteshi zokuhlukanisa isikhala, futhi izinga ledatha lesiteshi ngasinye liphansi kakhulu, okungenani amakhulu ambalwa e-Gbit/s (800G). I-T-level ingaba nezinhlelo zokusebenza ezilinganiselwe.
Kodwa esikhathini esizayo esibonakalayo, umqondo wokulinganisa okujwayelekile kwendawo uzofinyelela umkhawulo wawo wokulinganisa, futhi kumele ugcwaliswe ngokulinganisa kwe-spectrum kwemifudlana yedatha ku-fiber ngayinye ukuze kulondolozwe ukuthuthukiswa okwengeziwe kwamazinga edatha. Lokhu kungavula isikhala esisha ngokuphelele sohlelo lokusebenza lobuchwepheshe bokuhlukaniswa kwe-wavelength, lapho ukulinganisa okuphezulu kwenombolo yesiteshi kanye nesilinganiso sedatha kubalulekile.
Kulesi simo, ijeneretha ye-frequency comb (FCG), njengomthombo wokukhanya we-compact futhi oqinile we-multi wavelength, ingahlinzeka ngenani elikhulu labathwali be-optical abachazwe kahle, ngaleyo ndlela idlala indima ebalulekile. Ngaphezu kwalokho, inzuzo ebaluleke kakhulu ye-optical frequency comb ukuthi imigqa ye-comb ilingana kakhulu ngemvamisa, okungakhulula izidingo zama-inter channel guard bands futhi kugweme ukulawulwa kwemvamisa okudingekayo kwimigqa eyodwa ezinhlelweni zendabuko ezisebenzisa ama-DFB laser arrays.
Kufanele kuqashelwe ukuthi lezi zinzuzo azisebenzi kuphela ku-transmitter ye-wavelength division multiplexing, kodwa futhi nakuma-receiver ayo, lapho i-discrete local oscillator (LO) array ingashintshwa yi-single comb generator. Ukusetshenziswa kwama-LO comb generator kungenza kube lula kakhulu ukucutshungulwa kwesignali yedijithali eziteshini ze-wavelength division multiplexing, ngaleyo ndlela kuncishiswe ubunzima be-receiver futhi kuthuthukiswe ukubekezelelana komsindo wesigaba.
Ngaphezu kwalokho, ukusebenzisa izimpawu ze-LO comb ezinomsebenzi ovalwe ngesigaba ukuze kutholakale ukwamukelwa okuhlangene kungakha kabusha i-waveform yesizinda sesikhathi sesignali yonke ye-wavelength division multiplexing, ngaleyo ndlela kunxephezele umonakalo obangelwe ukungalungi kwe-optical kwe-fiber transmission. Ngaphezu kwezinzuzo zomqondo ezisekelwe ekudlulisweni kwesignali ye-comb, usayizi omncane kanye nokukhiqizwa okukhulu okuphumelelayo ngokwezomnotho nakho kuyizinto ezibalulekile zama-transceivers e-multiplexing division wavelength esikhathini esizayo.
Ngakho-ke, phakathi kwemibono eyahlukene yokukhiqiza isignali yekamu, amadivayisi e-chip level aphawuleka kakhulu. Uma ehlanganiswa namasekethe ahlanganisiwe e-photonic anwebeka kakhulu okushintshashintsha isignali yedatha, ukuphindaphinda, ukuhambisa, kanye nokwamukela, amadivayisi anjalo angaba yisihluthulelo sama-transceivers e-multiplexing ahlanganisiwe futhi asebenzayo okuhlukanisa ubude be-wavelength angenziwa ngobuningi obukhulu ngezindleko eziphansi, ngomthamo wokudlulisa ongamashumi e-Tbit/s nge-fiber ngayinye.
Ekuphumeni kokuphela kokuthumela, isiteshi ngasinye sihlanganiswa kabusha nge-multiplexer (MUX), kanti isignali ye-multiplexing division wavelength division idluliselwa nge-fiber yemodi eyodwa. Engxenyeni yokwamukela, i-wavelength division multiplexing receiver (WDM Rx) isebenzisa i-LO local oscillator ye-FCG yesibili ukuthola ukuphazamiseka kwe-multi wavelength. Isiteshi sesignali ye-input wavelength division multiplexing sihlukaniswa yi-demultiplexer bese sithunyelwa ku-coherent receiver array (Coh. Rx). Phakathi kwazo, imvamisa ye-demultiplexing ye-local oscillator LO isetshenziswa njengereferensi yesigaba se-coherent receiver ngayinye. Ukusebenza kwalesi sixhumanisi se-wavelength division multiplexing ngokusobala kuncike kakhulu ku-generator yesignali ye-comb eyisisekelo, ikakhulukazi ububanzi bokukhanya kanye namandla okukhanya omugqa ngamunye we-comb.
Vele, ubuchwepheshe be-optical frequency comb busesesigabeni sokuthuthukiswa, futhi izimo zokusetshenziswa kwayo kanye nosayizi wemakethe kuncane kakhulu. Uma inganqoba izithiyo zobuchwepheshe, inciphise izindleko, futhi ithuthukise ukuthembeka, ingafinyelela izinhlelo zokusebenza zezinga lesikali ekudlulisweni kwe-optical.
Isikhathi sokuthunyelwe: Disemba 19-2024