Ekusukeleni umthamo ophezulu kunye nomgama omde wothumelo kwiinkqubo zanamhlanje zonxibelelwano lwe-optical, ingxolo, njengomlinganiselo osisiseko womzimba, isoloko inyanzelisa ukuphuculwa komsebenzi.
KwisiqheloEDFAI-erbium-doped fiber amplifier system, i-optical transmission span nganye ivelisa malunga ne-0.1dB yengxolo eqokelelweyo ephumayo ezenzekelayo (ASE), esekelwe kwindalo ye-quantum random yokukhanya / ukusebenzisana kwe-electron ngexesha lenkqubo yokukhulisa.
Olu hlobo lwengxolo lubonakala njengepicosecond level time jitter kwi-domain yexesha. Ngokwe-jitter model prediction, phantsi kwemeko ye-dispersion coefficient ye-30ps / (nm · km), i-jitter iyanda nge-12ps xa ihambisa i-1000km. Kwi-domain frequency, kukhokelela ekunciphiseni kwe-optical signal-to-noise ratio (OSNR), okubangelwa ukulahlekelwa kwe-sensitivity ye-3.2dB (@ BER = 1e-9) kwinkqubo ye-40Gbps ye-NRZ.
Umngeni onzima kakhulu uvela ekudibaneni okuguquguqukayo kweziphumo zefiber ezingabonakaliyo kunye nokusabalalisa - i-coefficient ye-dispersion ye-fiber ye-mode ye-single-mode (G.652) kwi-window ye-1550nm yi-17ps / (nm · km), idibaniswe ne-nonlinear phase shift ebangelwa yi-self phase modulation (SPM). Xa amandla egalelo edlula i-6dBm, umphumo we-SPM uya kuphazamisa kakhulu i-pulse waveform.
Kwinkqubo ye-960Gbps ye-PDM-16QAM eboniswe kulo mzobo ungentla, ukuvulwa kwamehlo emva kokuhanjiswa kwe-200km yi-82% yexabiso lokuqala, kwaye i-Q factor igcinwe kwi-14dB (ehambelana ne-BER ≈ 3e-5); Xa umgama wandiswa ukuya kwi-400km, umphumo odibeneyo we-modulation ye-cross phase (XPM) kunye ne-4 wave mixing (FWM) ibangela ukuba i-degree yokuvula iliso yehle ngokukhawuleza ukuya kwi-63%, kwaye izinga lephutha lenkqubo lidlula isigqibo esinzima somda wokulungiswa kwempazamo ye-FEC ye-10 ^ -12.
Kubalulekile ukuqaphela ukuba ifuthe le-frequency chirp ye-laser yomodulation ngqo (DML) iya kuba mandundu - iparamitha ye-alpha (i-linewidth enhanced factor) ixabiso le-laser ye-DFB eqhelekileyo ikuluhlu lwe-3-6, kwaye utshintsho lwalo lwamaxesha olukhawulezayo lunokufikelela kwi-± 2.5GHz (ehambelana ne-chirp parameter C=2.5GHz modulation yangoku, isiphumo se-mA yangoku) izinga lokwandisa i-38% (i-cumulative dispersion D · L = 1360ps / nm) emva kokudluliselwa nge-80km G.652 fiber.
I-Channel crosstalk kwiinkqubo ze-wavelength division multiplexing (WDM) zenza imiqobo enzulu. Ukuthatha isithuba sesiteshi se-50GHz njengomzekelo, amandla okuphazamiseka okubangelwa ukuxuba amaza amaza (FWM) anobude obusebenzayo beLeff malunga ne-22km kwiifiber eziqhelekileyo ezibonakalayo.
I-Channel crosstalk kwiinkqubo ze-wavelength division multiplexing (WDM) zenza imiqobo enzulu. Ukuthatha isithuba sesiteshi se-50GHz njengomzekelo, ubude obusebenzayo bokuphazamiseka kwamandla okwenziwa ngumxube we-wave wave (FWM) yiLeff=22km (ehambelana ne-fiber attenuation coefficient α=0.22 dB/km).
Xa amandla okufakwayo anyuswa ukuya kwi-15dBm, inqanaba le-crosstalk phakathi kweziteshi ezikufutshane landa nge-7dB (ngokunxulumene nesiseko se--30dB), ukunyanzelisa inkqubo yokwandisa ukulungiswa kwephutha kwangaphambili (i-FEC) ukuphindaphinda ukusuka kwi-7% ukuya kwi-20%. Isiphumo sokhutshelo lwamandla olubangelwa luvuselelo lweRaman scattering (SRS) lukhokelela kwilahleko emalunga ne-0.02dB ngekhilomitha kwiitshaneli zamaza amaza amade, okukhokelela ekudipheni kwamandla ukuya kuthi ga kwi-3.5dB kwinkqubo ye-C+L band (1530-1625nm). Ixesha lokwenyani imbuyekezo yethambeka iyafuneka nge-dynamic gain equalizer (DGE).
Umda wokusebenza kwenkqubo yale miphumo yenyama edibeneyo inokulinganiswa ngemveliso yomgama we-bandwidth (B · L): i-B · L yenkqubo ye-modulation ye-NRZ eqhelekileyo kwi-G.655 fiber (i-dispersion compensated fiber) imalunga ne-18000 (Gb / s) · km, ngelixa kunye ne-PDM-QPSK ukumodareyitha kunye ne-teknoloji ehambelanayo yokufumanisa, esi sibonakaliso sinokuphucula i-0 (GG@8 km) I-SD-FEC ifumana i-9.5dB).
I-cut-edge 7-core x 3-mode space division multiplexing fiber (SDM) ifezekise amandla okuhambisa i-15.6Pb / s · km (umthamo we-fiber enye ye-1.53Pb / sx umgama wokuhanjiswa kwe-10.2km) kwiindawo zebhubhoratri ngokusebenzisa ubuthathaka bokudibanisa i-inter core crosstalk control (<-40d).
Ukusondela kumda we-Shannon, iinkqubo zanamhlanje kufuneka zamkele ngokudibeneyo ukubunjwa okunokwenzeka (PS-256QAM, ukufikelela kwinzuzo yokubunjwa kwe-0.8dB), ukulingana kwenethiwekhi ye-neural (ukusebenza kwembuyekezo ye-NL kuphuculwe nge-37%), kunye nokusasazwa kwe-Raman amplification (DRA, ukufumana ukuchaneka kwethambeka ± 0.5dB) yonyusa itekhnoloji ye-Q4 yetekhnoloji enye Ukuhanjiswa kwePDM-64QAM nge-2dB (ukusuka kwi-12dB ukuya kwi-14dB), kwaye ukhulule ukunyamezela kwe-OSNR kwi-17.5dB / 0.1nm (@ BER = 2e-2).
Ixesha lokuposa: Jun-12-2025