Ekufuneni amandla aphezulu kunye nomgama omde wokudlulisela kwiinkqubo zonxibelelwano lwe-optical zanamhlanje, ingxolo, njengomda osisiseko womzimba, ibisoloko ithintela ukuphuculwa kokusebenza.
Kwindlela eqhelekileyoI-EDFAInkqubo ye-armplifier yefayibha efakwe i-erbium, isithuba ngasinye sokudlulisa i-optical sivelisa malunga ne-0.1dB yengxolo yokukhupha umoya eqokelelweyo (ASE), esekwe kwindalo ye-quantum random yokunxibelelana kokukhanya/i-electron ngexesha lenkqubo yokukhulisa.
Olu hlobo lwengxolo lubonakala njenge-picosecond level timing jitter kwi-time domain. Ngokwesibikezelo semodeli ye-jitter, phantsi kwemeko ye-dispersion coefficient ye-30ps/(nm · km), i-jitter iyanda nge-12ps xa ithumela i-1000km. Kwi-frequency domain, ikhokelela ekunciphiseni kwe-optical signal-to-noise ratio (OSNR), okubangela ukulahleka kobuntununtunu be-3.2dB (@ BER=1e-9) kwinkqubo ye-40Gbps NRZ.
Umngeni onzima ngakumbi uvela ekudibaneni okunamandla kweziphumo ze-fiber nonlinear kunye nokusasazeka - i-dispersion coefficient ye-conventional single-mode fiber (G.652) kwifestile ye-1550nm yi-17ps/(nm · km), idibene ne-nonlinear phase shift ebangelwa yi-self phase modulation (SPM). Xa amandla okufaka edlula i-6dBm, isiphumo se-SPM siya kuyiphazamisa kakhulu i-pulse waveform.
Kwinkqubo ye-960Gbps ye-PDM-16QAM eboniswe kumfanekiso ongentla, ukuvulwa kwamehlo emva kokudluliselwa kwe-200km yi-82% yexabiso lokuqala, kwaye i-Q factor igcinwa kwi-14dB (ehambelana ne-BER ≈ 3e-5); Xa umgama unwetshiwe ukuya kwi-400km, isiphumo esidibeneyo se-cross phase modulation (XPM) kunye ne-four wave mixing (FWM) sibangela ukuba i-eye opening degree yehle kakhulu iye kwi-63%, kwaye izinga leempazamo zenkqubo lidlula umda wokulungiswa kweempazamo ze-FEC onzima we-10 ^ -12.
Kubalulekile ukuqaphela ukuba isiphumo se-frequency chirp se-direct modulation laser (DML) siya kuba mandundu - ixabiso le-alpha parameter (linewidth enhancement factor) ye-standard DFB laser ikuluhlu lwe-3-6, kwaye utshintsho lwayo lwe-instantaneous frequency lunokufikelela kwi-± 2.5GHz (ehambelana ne-chirp parameter C=2.5GHz/mA) kwi-modulation current ye-1mA, nto leyo ekhokelela kwisantya sokwandisa i-pulse se-38% (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 se-channel ye-50GHz njengomzekelo, amandla okuphazamiseka abangelwa kukuxubana kwamaza amane (FWM) anobude obusebenzayo be-Leff obumalunga ne-22km kwiifayibha ze-optical eziqhelekileyo.
I-channel crosstalk kwiinkqubo ze-wavelength division multiplexing (WDM) zenza imiqobo enzulu. Ukuthatha isithuba se-channel ye-50GHz njengomzekelo, ubude obusebenzayo bamandla okuphazamiseka aveliswa yi-four wave mixing (FWM) yiLeff=22km (ehambelana ne-fiber attenuation coefficient α=0.22 dB/km).
Xa amandla okufaka enyuka aye kwi-+15dBm, inqanaba lokuthetha phakathi kweetshaneli ezikufutshane liyanda nge-7dB (xa kuthelekiswa nesiseko se--30dB), nto leyo enyanzela inkqubo ukuba yonyuse uhlengahlengiso lwempazamo yangaphambili (FEC) ukusuka kwi-7% ukuya kwi-20%. Isiphumo sokudluliselwa kwamandla esibangelwa kukusasazwa kweRaman okukhuthazwayo (SRS) siphumela ekulahlekelweni malunga ne-0.02dB ngekhilomitha nganye kwiitshaneli ezinde zobude, nto leyo ekhokelela ekudibaneni kwamandla ukuya kuthi ga kwi-3.5dB kwinkqubo ye-C+L band (1530-1625nm). Imbuyekezo ye-slope yexesha langempela iyadingeka nge-dynamic gain equalizer (DGE).
Umda wokusebenza kwenkqubo kwezi ziphumo zomzimba zidibeneyo unokulinganiswa ngemveliso yomgama we-bandwidth (B · L): i-B · L yenkqubo eqhelekileyo ye-NRZ modulation kwi-G.655 fiber (i-dispersion compensated fiber) imalunga ne-18000 (Gb/s) · km, ngelixa nge-PDM-QPSK modulation kunye netekhnoloji yokufumanisa ehambelanayo, esi salathisi sinokuphuculwa siye kwi-280000 (Gb/s) · km (@ SD-FEC gain 9.5dB).
I-fiber ye-multiplexing ye-7-core x 3-mode space division multiplexing (SDM) yanamhlanje ifikelele kumthamo wokudlulisela we-15.6Pb/s · km (umthamo we-fiber enye we-1.53Pb/sx umgama wokudlulisela we-10.2km) kwiindawo zelebhu ngokusebenzisa ulawulo olubuthathaka lwe-inter core crosstalk (<-40dB/km).
Ukuze sisondele kumda weShannon, iinkqubo zanamhlanje kufuneka zisebenzise ngokudibeneyo ukwakheka kwe-probability (PS-256QAM, ukufikelela kwi-0.8dB shaping gain), i-neural network equalization (ukusebenza kakuhle kwe-NL compensation kuphuculwe nge-37%), kunye ne-distributed Raman amplification (DRA, gain slope accuracy ± 0.5dB) technologies ukwandisa i-Q factor yokudluliselwa kwe-single carrier 400G PDM-64QAM nge-2dB (ukusuka kwi-12dB ukuya kwi-14dB), kunye nokunciphisa ukunyamezela kwe-OSNR ukuya kwi-17.5dB/0.1nm (@ BER=2e-2).
Ixesha leposi: Juni-12-2025