Siyazi ukuthi kusukela ngeminyaka yawo-1990s, ubuchwepheshe be-WDM wavelength division multiplexing buye basetshenziselwa izixhumanisi ze-fiber optic zamabanga amade ezihlanganisa amakhulu noma izinkulungwane zamakhilomitha. Emazweni amaningi nasezifundeni, ingqalasizinda ye-fiber optic iyimpahla ebiza kakhulu, kuyilapho izindleko zezingxenye ze-transceiver ziphansi.
Kodwa-ke, ngokukhula okuqhumayo kwamazinga okudluliswa kwedatha yenethiwekhi njenge-5G, ubuchwepheshe be-WDM buye bubaluleke kakhulu ezixhumanisini ezikude, futhi umthamo wokuthunyelwa wezixhumanisi ezimfushane mkhulu kakhulu, okwenza izindleko nobukhulu bezingxenye ze-transceiver zizwele.
Njengamanje, lawa manethiwekhi asathembela ezinkulungwaneni zemicu ye-optical yemodi eyodwa ukuze idluliselwe ngokufanayo ngokusebenzisa iziteshi eziphindaphindayo zokuhlukaniswa komkhathi, futhi izinga ledatha lesiteshi ngasinye liphansi uma kuqhathaniswa, okungenani lingamakhulu ambalwa kuphela ama-Gbit/s (800G). I-T-level ingaba nezinhlelo zokusebenza ezinomkhawulo.
Kodwa esikhathini esizayo esibonakalayo, umqondo wokufana kwendawo ojwayelekile uzofinyelela umkhawulo wawo wokukala, futhi kufanele wengezwe ngokuhambisana kwe-spectrum kokusakazwa kwedatha ku-fiber ngayinye ukuze kugcinwe ukuthuthukiswa okuqhubekayo kumazinga edatha. Lokhu kungase kuvule isikhala esisha sohlelo lokusebenza sobuchwepheshe be-wavelength division multiplexing, lapho ubuningi bokukaleka kwenombolo yesiteshi nezinga ledatha kubalulekile.
Kulokhu, i-frequency comb generator (FCG), njengomthombo wokukhanya wamaza wamaza amaningi ohlangene futhi ongashintshi, ingahlinzeka ngenani elikhulu labathwali be-optical abachazwe kahle, ngaleyo ndlela idlale indima ebalulekile. Ukwengeza, inzuzo ebaluleke kakhulu ye-optical frequency comb ukuthi imigqa yekamu ilingana ngokujwayelekile ngefrikhwensi, engakhulula izimfuneko zamabhendi onogada aphakathi kwamashaneli futhi igweme ukulawulwa kwamafrikhwensi adingekayo emigqeni eyodwa ezinhlelweni zendabuko kusetshenziswa i-DFB laser arrays.
Kufanele kuqashelwe ukuthi lezi zinzuzo azisebenzi nje kuphela kusidlulisi se-wavelength division multiplexing, kodwa futhi nakumamukeli wayo, lapho i-discrete local oscillator (LO) array ingathathelwa indawo yi-generator eyodwa yekamu. Ukusetshenziswa kwamajeneretha we-LO comb kungaqhubeka kusiza ukucutshungulwa kwesignali yedijithali eziteshini zokuphindaphinda ze-wavelength division, ngaleyo ndlela kunciphise ubunzima bomamukeli futhi kuthuthukise ukubekezelelana komsindo.
Ukwengeza, ukusebenzisa amasiginali we-LO comb anomsebenzi okhiywe ngesigaba wokwamukela okuhambisanayo okuhambisanayo kungakha kabusha i-waveform yesizinda sesikhathi sayo yonke isiginali ye-wavelength division multiplexing, ngaleyo ndlela kunxeshezelwe umonakalo odalwe ukungaboni ngasolinye kwe-fiber yokudlulisela. Ngaphezu kwezinzuzo zomqondo ezisuselwe ekudluliselweni kwesignali yekama, usayizi omncane kanye nokukhiqizwa kwesilinganiso esikhulu esiphumelelayo ngokomnotho nakho kuyizici ezibalulekile zama-multiplexing transceivers okuhlukaniswa kwe-wavelength esikhathini esizayo.
Ngakho-ke, phakathi kwemiqondo ehlukahlukene ye-comb generator, amadivaysi ezinga le-chip aphawuleka kakhulu. Uma kuhlanganiswa neziyingi ezididiyelwe ze-photonic ezibukhali kakhulu zokushintsha isignali yedatha, ukuphindaphindeka, umzila, nokwamukela, lezo mishini ingase ibe ukhiye kuma-transceiver ahlangene futhi asebenzayo we-wavelength division multiplexing angenziwa ngobuningi ngenani eliphansi, namandla okudlulisela amashumi Tbit/s nge-fiber ngayinye.
Ekuphumeni kokuphela kokuthumela, isiteshi ngasinye sihlanganiswa kabusha nge-multiplexer (MUX), futhi isignali ye-multiplexing ye-wavelength division idluliselwa nge-fiber yemodi eyodwa. Ekupheleni kokwamukela, isamukeli se-wavelength division multiplexing (WDM Rx) sisebenzisa i-oscillator yendawo ye-LO ye-FCG yesibili ukuze kutholwe ukuphazamiseka kwamaza amaningi. Ishaneli yesignali ye-multiplexing ye-wavelength ye-input division ihlukaniswa yi-demultiplexer bese ithunyelwa kumalungu afanayo owamukelayo (Coh. Rx). Phakathi kwazo, i-demultiplexing frequency ye-oscillator yendawo LO isetshenziswa njengereferensi yesigaba somamukeli ngamunye ohlangene. Ukusebenza kwalesi sixhumanisi sokuphindaphinda kwe-wavelength division ngokusobala kuncike kakhulu kujeneretha yesignali yekama eyisisekelo, ikakhulukazi ububanzi bokukhanya namandla okubona omugqa ngamunye wekama.
Kunjalo, ubuchwepheshe be-optical Commb technology busesesigabeni sokuthuthuka, futhi izimo zokusetshenziswa kwabo kanye nosayizi wemakethe kuncane uma kuqhathaniswa. Uma inganqoba izingqinamba zobuchwepheshe, yehlise izindleko, futhi ithuthukise ukwethembeka, ingase ifinyelele izinhlelo zokusebenza zezikali ekudluliselweni kwe-optical.
Isikhathi sokuthumela: Dec-19-2024