Yakajairwa fiber inowana rekodhi rekodhi rekodhi, kupfuura yakazara yepasirese Internet traffic

Chikwata chetsvakiridzo kubva kuNetwork Research Institute yeJapan's National Institute of Information and Communication Technologies (NICT) yawana rekodhi yenyika itsva bandwidth ye1.53 Pbit/s pachiyero chakajairwa optical fiber. Izvi zvinoreva kuti traffic yeInternet yepasi rose inogona kupinda mairi.
Kufambira mberi kwakafanana kwakashumwa hafu yemwedzi yapfuura: bandwidth ye 1.84 Pbit / s yakawanikwa nelaser imwe chete uye imwe optical chip, kukosha kwakakwirira kudarika iyo yakawanikwa neNICTs, asi dambudziko rayo nderekuti ichiri kuedza. Photonic machipisi ari padanho rekugadzira, saka iyi NTIC tsvakiridzo inogona kuitwa kare.

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Multiplexing tekinoroji: zadzisa rekodhi bandwidth ye1.53 Pbit/s
Vatsvagiri vakawana bandwidth ingangoita 1.53 Pbit/s nekukodha ruzivo pamakumi mashanu neshanu akasiyana optical frequency (nzira inozivikanwa semultiplexing). Izvo zvakakwana bandwidth kutakura ese epasi rose traffic (inofungidzirwa isingasviki 1 Pbit/s) pane imwechete fiber optic tambo: miriyoni yakawanda inoshanda kupfuura Gbit connection (pamwero wezviitiko) izvo munhuwo zvake ane.
Iyo tekinoroji inoshanda nekutora mukana weakasiyana mafambisirwo echiedza pane ese spectrum. Sezvo imwe neimwe "ruvara" mu spectrum (inooneka uye isingaonekwi) ine nguva yayo: kusiyana nemamwe mafrequency ese, inogona kutakura yakazvimirira kuyerera kweruzivo. Vatsvagiri vakakwanisa kuvhura spectral kunyatsoshanda kwe332 bits/s/Hz (bits pasekondi paHertz); iyi yakakwira zvakapetwa katatu pane yakamboedza yakanakisa muna 2019 - iyo yekupedzisira ichiwana spectral kunyatsoshanda kwe105 bits/s/Hz.

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Kuedza kuseta: C-bhendi ruzivo rwekufambisa pa184 akasiyana wavelengths
Vatsvakurudzi vakakwanisa kufambisa ruzivo rweC-bhendi kumativi 184 akasiyana-siyana mawavelengths: aya akazvimiririra, asingapindirane mafrequency anoshandiswa kufambisa ruzivo panguva imwe chete mukati mefiber optic cable. Chiedza chinogadziridzwa kuti chitumire makumi mashanu neshanu hova (matani) e data isati yatumirwa pasi tambo yefiber optic. Kana yangogadziriswa (senge yakawanda fiber optic tambo dzakaiswa parizvino), inoda girazi musimboti wekutakura data rese. Sezvo data inotumirwa (inovhara 184 wavelengths uye 55 modes), anogamuchira anotsanangura akasiyana wavelengths uye modes kuunganidza data rayo. Muchiyedzo, chinhambwe pakati peanotumira neanogamuchira chakaiswa ku25.9 km.

①Optical comb sosi: 184 vatakuri vanogadzirwa mune optical comb sosi. ②Signal modulation. Iyo inotakura inogadziriswa ne 16 QAM uye polarization multiplexed masaini. ③ Parallel chiratidzo chizvarwa. Zviratidzo zveimwe neimwe modhi zvinomisikidzwa uye kunonoka kwegwara kunoiswa kutevedzera yakazvimirira kuyerera kwedata. ④ mode multiplexer. Chiratidzo chega chega chinoshandurwa kune imwe spatial mode uye inotumirwa kune 55-modhi fiber. ⑤ 55 mode fiber. Chiratidzo chinopararira mu 25.9 makiromita kureba mode 55 fiber. ⑥ Demultiplexer maitiro. Pane inogamuchira, chiratidzo kubva kune yega yega modhi yenzvimbo inoparadzaniswa uye inoshandurwa kuita yakakosha modhi. ⑦ High speed parallel receiver. Iyo modhi-demultiplexed siginecha ndeye wavelength-demultiplexed nesefa uye inoshandurwa kuita chiratidzo chemagetsi neinopindirana inogamuchira inogamuchira. ⑧ Offline chiratidzo kugadzirisa. MIMO kugadzirisa kubvisa kukanganiswa kwechiratidzo panguva yekuparadzira fiber.

Migumisiro yekuedza inoratidza kuti kunyange zvazvo chiyero che data chinodonha zvishoma pamagumo akareba e-wavelength yeC-band (inenge 1565 nm), yakagadzikana uye inenge yakafanana chiyero che data inowanikwa kune dzimwe nzvimbo dzewavelength, inosvika pahuwandu hwe1.53 Pbit / s mushure. kukanganisa. kururamisa