I-Standard fiber ifikelela kwirekhodi yehlabathi ye-bandwidth, idlula ithrafikhi ye-intanethi iyonke yehlabathi

Iqela lophando elivela kwi-Network Research Institute of Japan's National Institute of Information and Communications Technology (NICT) lifikelele kwirekhodi entsha yehlabathi ye-bandwidth ye-1.53 ​​Pbit/s kwi-optical fiber enobubanzi obuqhelekileyo. Oku kuthetha ukuba lonke ithrafikhi ye-intanethi yehlabathi inokungena kuyo.
Impumelelo efanayo ibikwe kwiiveki ezimbini ezidlulileyo: i-bandwidth ye-1.84 Pbit/s ifikelelwe nge-laser enye kunye ne-chip enye ye-optical, ixabiso eliphakamileyo kunelo lifikelelwe yi-ICTs, kodwa ingxaki kukuba isavavanywa. Ii-chips ze-Photonic zikwinqanaba loyilo; ngoko ke, olu phando lwe-ICT lunokuphunyezwa kungekudala.

01

Itekhnoloji ye-Multiplexing: fikelela kwi-bandwidth yerekhodi ye-1.53 ​​Pbit/s
Abaphandi bafikelele kwi-bandwidth emalunga ne-1.53 ​​Pbit/s ngokufaka ulwazi kwiifrikhwensi ezahlukeneyo ze-optical ezingama-55 (indlela eyaziwa ngokuba yi-multiplexing). Loo bandwidth yanele ukuthwala yonke ithrafikhi ye-intanethi yehlabathi (eqikelelwa ngaphantsi kwe-1 Pbit/s) ngentambo enye ye-fiber optic—isebenza ngokuphindwe kasigidi kunoqhagamshelo lwe-Gbit (engcono kakhulu) olunomntu oqhelekileyo.
Le teknoloji isebenza ngokusebenzisa amaza okukhanya ahlukeneyo kwi-spectrum. Ekubeni "umbala" ngamnye kwi-spectrum (ebonakalayo nengabonakaliyo) unezawo, ngokungafaniyo nezinye iiza, inokuthwala ulwazi lwayo oluzimeleyo. Abaphandi bafumene ukusebenza kakuhle kwe-spectral kwe-332 bits/s/Hz (iibhiti ngomzuzwana kwiHertz nganye), okuphindwe kathathu kunomzamo wabo wangaphambili ongcono ngo-2019, owafumana ukusebenza kakuhle kwe-spectral kwe-105 bits/s/Hz.

02
Ukuseta kovavanyo: Ukudluliselwa kolwazi lwebhendi ye-C kumaza obude obahlukeneyo ali-184
Abaphandi badlulise ngempumelelo ulwazi lwe-C-band kwiiwavelengths ezili-184 ezahlukeneyo: ezi frequencies ezizimeleyo, ezingadibaniyo zisetyenziselwa ukudlulisa ulwazi ngaxeshanye ngaphakathi kwintambo ye-fiber optic. Ukukhanya kuguqulwa ukuze kudluliselwe imijelo eyahlukeneyo engama-55 (iipateni) zedatha ngaphambi kokuba ithunyelwe ngentambo ye-fiber optic. Nje ukuba iguqulwe (njengeentambo ezininzi ze-fiber optic ezisetyenziswayo ngoku), ifuna isiseko seglasi ukuze ithwale yonke idatha. Njengoko idatha (equka iiwavelengths ezili-184 kunye neendlela ezingama-55) ithunyelwa, umamkeli ucacisa iiwavelengths ezahlukeneyo kunye neendlela zokuqokelela idatha yakhe. Kolu vavanyo, umgama phakathi komthumeli kunye nomamkeli wawumiselwe kwi-25.9 km.

① Umthombo we-Optical comb: Ii-carriers ezili-184 zenziwa kumthombo we-optical comb. ② Ukuguqulwa kwesignali: I-carrier ilawulwa nge-16 QAM signals kunye ne-multiplexed polarization. ③ Ukuveliswa kwesignali ehambelanayo: I-signals yemo nganye iyahlulwahlulwa, kwaye ukulibaziseka kwendlela kusetyenziswa ukulinganisa imijelo yedatha ezimeleyo. ④ I-Mode multiplexer: I-signal nganye iguqulwa ibe yimo eyahlukileyo yendawo kwaye ithunyelwe kwi-fiber yemo ye-55. ⑤ I-fiber yemo ye-55: I-signal isasazeka kwi-fiber yemo ye-55 enobude obuziikhilomitha ezingama-25.9. ⑥ I-Mode demultiplexer: Kwi-receiver, i-signal yahlulwe kwimo nganye yendawo kwaye iguqulwe kwimo yesiseko. ⑦ I-High-speed parallel receiver: I-mode-demultiplexed signal ityhilwa yi-wavelength-demultiplexed yi-filter kwaye iguqulwe ibe yisignali yombane yi-parallel coherent receiver. ⑧ Ukucubungula i-Offline signal. Ukucubungula i-MIMO ukuphelisa ukuphazamiseka kwesignali ngexesha lokusasazwa kwe-fiber.

Iziphumo zovavanyo zibonisa ukuba nangona izinga ledatha lihla kancinci kwisiphelo sobude be-wavelength yebhendi ye-C (malunga ne-1565 nm), izinga ledatha elizinzileyo neliphantse lifane lifunyanwa kwezinye iindawo zobude be-wavelength, lifikelela kwi-1.53 ​​Pbit/s iyonke emva kokulungiswa kwempazamo.