Standard fiber yakawana rekodhi yepasi rose yebandwidth, ichipfuura traffic yese yeinternet yepasi rose

Chikwata chevatsvagiri kubva kuNetwork Research Institute of Japan's National Institute of Information and Communications Technology (NICT) chawana rekodhi itsva yepasi rose ye1.53 Pbit/s pafiber ye optical ine dhayamita yakajairika. Izvi zvinoreva kuti traffic yese yeinternet pasi rose inogona kukwana mairi.
Kubudirira kwakafanana kwakashumwa mavhiki maviri apfuura: bandwidth ye1.84 Pbit/s yakawanikwa nelaser imwe chete uye chip imwe chete ye optical, kukosha kwakakwira kupfuura kwakaitwa neICTs, asi dambudziko nderekuti ichiri kuyedzwa. Photonic chips dziri muchikamu chekugadzira; saka, iyi ongororo yeICT inogona kuitwa nekukurumidza.

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Tekinoroji yeMultiplexing: kuwana bandwidth yakarekodhwa ye1.53 Pbit/s
Vaongorori vakawana bandwidth inosvika 1.53 Pbit/s nekunyora ruzivo kuburikidza nemafrequencies makumi mashanu nemashanu akasiyana e optical (nzira inozivikanwa se multiplexing). Iyoyo bandwidth yakakwana kutakura traffic yese yeinternet pasi rose (inofungidzirwa kuti iri pasi pe 1 Pbit/s) kuburikidza netambo imwe chete ye fiber optic - inoshanda zvakapetwa kamiriyoni kupfuura Gbit connection (papamusoro) iyo munhuwo zvake anayo.
Tekinoroji iyi inoshanda nekushandisa mafrequency akasiyana echiedza mu spectrum. Sezvo "ruvara" rumwe nerumwe mu spectrum (runoonekwa nerusingaonekwe) ruine mafrequency arwo, kusiyana nemamwe ma frequency ese, runogona kutakura ruzivo rwarwo rwakazvimiririra. Vaongorori vakawana efficiency ye 332 bits/s/Hz (bits per second pa Hertz), yakapetwa katatu kupfuura kuedza kwavo kwakanakisisa muna 2019, iyo yakaita efficiency ye 105 bits/s/Hz.

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Kugadzika kwekuyedza: Kutumirwa kwemashoko ebhendi reC pa 184 wavelengths dzakasiyana
Vaongorori vakabudirira kuendesa ruzivo rweC-band kuburikidza nemawavelengths 184 akasiyana: aya mafrequency akazvimiririra, asingapindirani anoshandiswa kuendesa ruzivo panguva imwe chete mukati mewavelengths yefiber optic. Chiedza chinogadziriswa kuti chitumire mastreams 55 akasiyana (mapatani) edata chisati chatumirwa kuburikidza newavelengths yefiber optic. Kana chagadziriswa (semamwe mawavelengths akawanda ari kushandiswa parizvino), chinoda girazi core kuti ritakure data rese. Sezvo data (rinofukidza mawavelengths 184 uye mamode 55) richitumirwa, receiver inosarudza mawavelengths akasiyana uye mamode kuti iunganidze data rayo. Mukuyedza, daro riri pakati petransmitter nereceiver rakaiswa pa25.9 km.

① Manyuko emuchina weOptical: 184 vatakuri vanogadzirwa mu "optical comb source". ② Kuchinja kwechiratidzo: "Carrier" inogadziriswa ne16 QAM signals uye multiplexed polarization. ③ Parallel signal generation: "Masaini emodhi yega yega anopatsanurwa, uye kunonoka kwenzira kunoshandiswa kutevedzera data streams dzakazvimiririra. ④ Mode multiplexer: "Signal yega yega inoshandurwa kuita "spatial mode" yakasiyana uye inotumirwa kune "55-mode fiber". ⑤ 55-mode fiber: "Signal" inopararira mu "55-kilometer-long 55-mode fiber". ⑥ "Mode demultiplexer": Pa "receiver", "signal" inoparadzaniswa mu "spatial mode" yega yega uye inoshandurwa kuita "fundamental mode". ⑦ "High-speed parallel receiver": "Mode-demultiplexed signal" inobviswa wavelength ne "filter" uye inoshandurwa kuita "electrical signal" ne "parallel coherent receiver". ⑧ "Offline signal processing". "MIMO processing" kubvisa kukanganiswa kwechiratidzo panguva yekuparadzira "fiber".

Mhedzisiro yekuyedza inoratidza kuti kunyangwe chiyero chedata chichidzikira zvishoma pamagumo erefu ewavelength yeC band (inenge 1565 nm), chiyero chedata chakasimba uye chakafanana chinowanikwa mune dzimwe nzvimbo dzewavelength, kusvika pahuwandu hwe1.53 Pbit/s mushure mekugadziriswa kwechikanganiso.