Ithimba labacwaningi eliphuma ku-Network Research Institute ye-Japan's National Institute of Information and Communication Technologies (NICT) lizuze irekhodi elisha lomkhawulokudonsa womhlaba ongu-1.53 Pbit/s ku-diameter optical fiber evamile . Lokhu kusho ukuthi ithrafikhi ye-inthanethi yomhlaba wonke ingangena kuyo.
Ukuthuthukiswa okufanayo kwabikwa engxenyeni yenyanga edlule: umkhawulokudonsa we-1.84 Pbit/s wafinyelelwa nge-laser eyodwa kanye ne-chip eyodwa ye-optical, inani eliphakeme kunalelo elitholwe ama-NICTs, kodwa inkinga yalo ukuthi isahlolwa. Ama-Photonic chips esigabeni sokuklama, ngakho-ke lolu cwaningo lwe-NTIC lungasetshenziswa ngaphambi kwesikhathi.
01
Ubuchwepheshe be-Multiplexing: finyelela umkhawulokudonsa werekhodi we-1.53 Pbit/s
Abacwaningi bathole umkhawulokudonsa ocishe ube ngu-1.53 Pbit/s ngokufaka ulwazi kumafrikhwensi okubona ahlukene angama-55 (inqubo eyaziwa ngokuthi i-multiplexing). Lowo mkhawulokudonsa owanele ukuthwala yonke ithrafikhi ye-inthanethi yomhlaba (elinganiselwe ngaphansi kuka-1 Pbit/s) ngekhebula le-fiber optic eyodwa: ukusebenza ngempumelelo izikhathi eziyisigidi kunoxhumo lwe-Gbit (ezikhathini ezinhle kakhulu) umuntu ojwayelekile anazo.
Ubuchwepheshe busebenza ngokusebenzisa amafrikhwensi ahlukene okukhanya kuyo yonke i-spectrum. Njengoba “umbala” ngamunye ku-spectrum (obonakalayo nongabonakali) unemvamisa yawo: ngokungafani nawo wonke amanye ama-frequency, ungathwala ukugeleza kwawo okuzimele kolwazi. Abacwaningi bakwazile ukuvula ukusebenza kahle kwe-spectral kwe-332 bits/s/Hz (amabhithi ngomzuzwana nge-Hertz); lokhu kuphakeme ngokuphindwe kathathu kunomzamo wawo wangaphambilini ongcono kakhulu ngo-2019 - lokhu okulandelayo kuzuza ukusebenza kahle kwe-spectral kwamabhithi angu-105/s/Hz.
02
Ukusethwa kokuhlola: Ukudluliswa kolwazi lwe-C-band kumaza wamaza ahlukene angu-184
Abacwaningi bakwazile ukudlulisa ulwazi lwe-C-band kuwo wonke amaza angamaza ahlukene angu-184: lawa maza azimele, angadluleli asetshenziselwa ukudlulisa ulwazi ngesikhathi esisodwa ngaphakathi kwentambo ye-fiber optic. Ukukhanya kushintshiwe ukuze kudlulise imifudlana (amaphethini) ehlukene engama-55 yedatha ngaphambi kokuthunyelwa phansi ngentambo ye-fiber optic. Uma isishintshiwe (njengamakhebuli amaningi e-fiber optic asetshenziswe njengamanje), kudinga umgogodla wengilazi ukuze iphathe yonke idatha. Njengoba idatha ithunyelwa (ehlanganisa amaza angama-wave angama-184 nezindlela ezingu-55), umamukeli unquma ubude beza obuhlukene nezindlela zokuqoqa idatha yakhe. Esivivinyweni, ibanga phakathi komthumeli nomamukeli lisethelwe ku-25.9 km.
①Umthombo wekama obonakalayo: Izinkampani zenethiwekhi eziyi-184 zikhiqizwa emthonjeni wekama obonakalayo. ②Ukuguquguquka kwesignali. Isithwali silungiswa nge-16 QAM kanye namasiginali we-polarization multiplexed. ③ Parallel signal generation. Amasignali emodi ngayinye anemfoloko futhi indlela yokubambezeleka isetshenziswa ukuze kulingise ukugeleza kwedatha okuzimele. ④ imodi yokuphindaphinda. Isignali ngayinye iguqulelwa kumodi yendawo ehlukile futhi ithunyelwe ku-fiber yemodi engu-55. ⑤ 55 imodi fiber. Isiginali isakaza kumodi ye-25.9 km ubude 55 fiber. ⑥ Imodi ye-Demultiplexer. Kumamukeli, isignali evela kumodi yendawo ngayinye iyahlukaniswa futhi iguqulelwe kumodi eyisisekelo. ⑦ Isamukeli esihambisana nesivinini esikhulu. Isignali yemodi-demultiplexed i-wavelength-demultiplexed ngesihlungi futhi iguqulelwa kusignali kagesi yisamukeli esihambisanayo esihambisanayo. ⑧ Ukucubungula isignali engaxhunyiwe ku-inthanethi. Ukucutshungulwa kwe-MIMO ukuqeda ukuphazamiseka kwesignali ngesikhathi sokusakazwa kwefayibha.
Imiphumela yokuhlola ibonisa ukuthi nakuba izinga ledatha lehla kancane ekupheleni kwe-wavelength ende ye-C-band (cishe i-1565 nm), izinga ledatha elizinzile futhi elicishe lifane litholwa kwezinye izifunda ze-wavelength, lifinyelela inani elingu-1.53 Pbit/s ngemva kwalokho. iphutha. ukulungiswa
Isikhathi sokuthumela: Nov-18-2022
