I roto i te whai i te kaha teitei ake me te tawhiti tuku roa ake i roto i ngā pūnaha whakawhitiwhiti whatu hou, ko te haruru, hei herenga ā-tinana taketake, kua aukati tonu i te whakapai ake i te mahi.
I roto i te tikanga noaEDFAI roto i te pūnaha whakakaha muka kua tāpirihia ki te erbium, ka whakaputahia e ia whānuitanga tuku whatu te tata ki te 0.1dB o te haruru tukunga ohorere (ASE) kua kohia, e ahu mai ana i te āhua matapōkere matū o te taunekeneke mārama/irahiko i te wā o te tukanga whakakaha.
Ka puta tēnei momo haruru hei wiri wā taumata pikohekona i roto i te rohe wā. E ai ki te matapae tauira wiri, i raro i te āhuatanga o te tauwehenga marara o te 30ps/(nm · km), ka piki ake te wiri mā te 12ps ina tukuna ana te 1000km. I roto i te rohe auau, ka heke te ōwehenga tohu-ki-haruru whatu (OSNR), ka hua ake he ngaronga aro o te 3.2dB (@ BER=1e-9) i roto i te pūnaha NRZ 40Gbps.
Ko te wero nui ake i ahu mai i te hononga hihiri o ngā pānga kore-raina me te marara o te muka - ko te tauwehenga marara o te muka aratau-kotahi tikanga (G.652) i te matapihi 1550nm he 17ps/(nm · km), me te nekehanga ā-wāhanga kore-raina i puta mai i te whakarerekētanga ā-wāhanga whaiaro (SPM). Ina neke atu te mana whakauru i te 6dBm, ka tino whakapohehe te pānga SPM i te ngaru o te pao.
I roto i te pūnaha PDM-16QAM 960Gbps e whakaaturia ana i te ahua i runga ake nei, ko te whakatuwheratanga o te kanohi i muri i te tuku 200km he 82% o te uara tīmatanga, ā, ko te tauwehenga Q e mau tonu ana i te 14dB (e rite ana ki te BER ≈ 3e-5); Ina toro atu te tawhiti ki te 400km, ko te pānga whakakotahi o te whakarerekētanga wāhanga whakawhiti (XPM) me te whakaranu ngaru whā (FWM) ka heke tere te tohu whakatuwheratanga o te kanohi ki te 63%, ā, ka nui ake te tere hapa pūnaha i te rohe whakatikatika hapa FEC whakatau pakeke o te 10 ^ -12.
He mea tika kia mōhiotia ka kino haere te pānga o te auau o te rēseri whakarerekētanga tika (DML) - ko te uara o te tawhā alpha (te tauwehenga whakarei ake i te whānui raina) o te rēseri DFB noa kei roto i te awhe 3-6, ā, ka taea e tōna huringa auau tere te eke ki te ± 2.5GHz (e rite ana ki te tawhā o te rēseri C=2.5GHz/mA) i te ia whakarerekētanga o te 1mA, ka hua ake he tere whānui o te pā o te 38% (te mararatanga tāpiri D · L=1360ps/nm) i muri i te tuku mā te muka G.652 80km.
He arai hohonu ake te whakawhitiwhiti kōrero hongere i roto i ngā pūnaha whakarea wehenga roangaru (WDM). Hei tauira, ko te mana pokanoa i puta mai i te whakaranu ngaru e whā (FWM) he roa whai hua Leff tata ki te 22km i roto i ngā muka whatu noa.
He arai hohonu ake te whakawhitiwhiti hongere i roto i ngā pūnaha whakarea wehenga roangaru (WDM). Mā te whakamahi i te tawhiti hongere 50GHz hei tauira, ko te roa whai hua o te mana pokanoa i hangaia e te whakaranu ngaru e whā (FWM) ko Leff=22km (e rite ana ki te tauwehenga whakaiti muka α=0.22 dB/km).
Ina whakanuia te mana whakauru ki te +15dBm, ka piki ake te taumata whakawhitiwhiti kōrero i waenga i ngā hongere tata mā te 7dB (e pā ana ki te turanga -30dB), ka akiaki i te pūnaha ki te whakanui ake i te whakatikatika hapa whakamua (FEC) mai i te 7% ki te 20%. Ko te pānga whakawhiti mana i puta mai i te Raman marara whakaoho (SRS) ka hua ake he ngaronga tata ki te 0.02dB ia kiromita i roto i ngā hongere roangaru, ka arahi ki te hekenga mana tae atu ki te 3.5dB i roto i te pūnaha roopu C+L (1530-1625nm). Me utu te pari wā-tūturu mā te whakamahi i te whakataurite whiwhinga hihiri (DGE).
Ka taea te ine i te rohe mahi pūnaha o ēnei pānga ā-tinana kua whakakotahihia mā te hua tawhiti whānui (B · L): ko te B · L o tētahi pūnaha whakarerekētanga NRZ noa i roto i te muka G.655 (muka utu marara) he tata ki te 18000 (Gb/s) · km, engari mā te whakarerekētanga PDM-QPSK me te hangarau kimi mārama, ka taea te whakapai ake i tēnei tohu ki te 280000 (Gb/s) · km (@ whakanui SD-FEC 9.5dB).
Kua tutuki i te muka whakarea wehewehe ātea (SDM) 7-matua x 3-aratau hou te kaha tuku o te 15.6Pb/s · km (te kaha tuku muka kotahi o te 1.53Pb/sx o te tawhiti tuku o te 10.2km) i roto i ngā taiao taiwhanga mā te whakahaere ngoikore o te hononga whakawhiti i waenga i ngā matua (<-40dB/km).
Hei whakatata atu ki te rohe o Shannon, me whakamahi ngātahi ngā pūnaha hou i te hanga tūponotanga (PS-256QAM, kia eke ki te 0.8dB te whakanui hanga), te whakataurite whatunga io (kua pai ake te whai huatanga utu NL mā te 37%), me ngā hangarau whakanui Raman tohatoha (DRA, tika pikinga whakanui ± 0.5dB) hei whakanui ake i te tauwehe Q o te tuku 400G PDM-64QAM kawe kotahi mā te 2dB (mai i te 12dB ki te 14dB), me te whakangāwari i te manawanui OSNR ki te 17.5dB/0.1nm (@ BER=2e-2).
Wā tuku: Pipiri-12-2025