I roto i te whai i te kaha teitei me te tawhiti atu o te whakawhiti i roto i nga punaha korero whatu hou, ko te haruru, he herenga tinana taketake, i aukati tonu i te whakapai ake i nga mahi.
I roto i te angamaheniEDFAKo te punaha whakakaha muka erbium-doped, ko ia wa tuku whatu e whakaputa tata ana ki te 0.1dB o te haruru tuku mahorahora (ASE), e whai pakiaka ana ki te ahua matapōkere o te tauwhitiwhiti marama/hiko i te wa o te whakakaha.
Ko tenei momo haruru e kitea ana ko te tohu o te taima taumata picosecond i roto i te rohe wa. E ai ki te matapae tauira jitter, i raro i te ahua o te whakarea mararatanga o te 30ps/(nm · km), ka piki te jitter ma te 12ps ina tuku 1000km. I roto i te rohe auau, ka arahi ki te hekenga o te tohu tohu-ki-haruru (OSNR), ka puta te mate o te 3.2dB (@ BER=1e-9) i roto i te punaha 40Gbps NRZ.
Ko te wero nui ake ka puta mai i te hononga hihiri o te muka kore raina me te marara - te whakarea marara o te muka aratau kotahi (G.652) i roto i te matapihi 1550nm he 17ps/(nm · km), ka honoa ki te huringa wahanga kore i puta mai i te whakarereketanga o te wahanga whaiaro (SPM). Ka nui ake te mana whakauru ki te 6dBm, ka tino whakakorikori te awe SPM i te ngaru ngaru.
I roto i te punaha 960Gbps PDM-16QAM e whakaatuhia ana i te ahua o runga ake nei, ko te whakatuwheratanga o te kanohi i muri i te tukunga 200km ko te 82% o te uara tuatahi, ka mau tonu te tauwehe Q i te 14dB (e rite ana ki te BER ≈ 3e-5); Ina roa te tawhiti ki te 400km, ko te whakakotahitanga o te huringa o te wahanga whakawhiti (XPM) me te whakaranu ngaru e wha (FWM) ka tino heke te tohu whakatuwhera kanohi ki te 63%, a ko te reiti hapa o te punaha ka nui ake i te whakatau pakeke FEC tepe whakatika hapa o 10 ^ -12.
He mea tika kia mohio koe ka nui haere te kaha o te tangihanga o te taiaho whakarereke tika (DML) - ko te tawhā alpha (te waahanga whakarei ake i te raina) te uara o te taiaho DFB angamaheni kei roto i te awhe o te 3-6, a ka taea e tona huringa auau inamata te tae ki te ± 2.5GHz (e rite ana ki te tawhā tangi C=2.5GHz/mA) i te reiti whakahuringa o te 1mA8% o te 1mA. marara D · L=1360ps/nm) i muri i te tukunga ma te muka 80km G.652.
Ko te korero whakawhiti hongere i roto i nga punaha whakahiatotanga wehenga roangaru (WDM) he tino whakaraerae. Ko te mokowā hongere 50GHz hei tauira, ko te mana pokanoa i puta mai i te whakaranu ngaru e wha (FWM) he roa whai hua te Leff tata ki te 22km i roto i nga muka whatu noa.
Ko te korero whakawhiti hongere i roto i nga punaha whakahiatotanga wehenga roangaru (WDM) he tino whakaraerae. Ko te mokowā hongere 50GHz hei tauira, ko te roa whai hua o te mana pokanoa i hangaia e te whakaranu ngaru e wha (FWM) ko Leff=22km (e rite ana ki te whakarea whakareatanga muka α=0.22 dB/km).
Ka piki ake te mana whakauru ki te +15dBm, ka piki ake te taumata whakawhiti korero i waenga i nga awa e tata ana ki te 7dB (e pa ana ki te -30dB turanga), ka akiakihia te punaha ki te whakanui ake i te whakatikatika hapa whakamua (FEC) mai i te 7% ki te 20%. Ko te painga o te whakawhiti hiko i puta mai i te whakahihiri i te whakamararatanga o Raman (SRS) ka puta te ngaronga tata ki te 0.02dB ia kiromita i roto i nga waahana roangaru roa, e arai atu ana ki te whakaheke hiko ki te 3.5dB i roto i te punaha C+L (1530-1625nm). Ko te utu o te titahatanga mo te wa tuturu ka hiahiatia na roto i te whakahōrite hua hihiri (DGE).
Ko te rohe mahi a te punaha o enei paanga tinana ka taea te tatau ma te hua tawhiti bandwidth (B · L): ko te B · L o te punaha whakarereketanga NRZ angamaheni i roto i te muka G.655 (te muka utu marara) he tata ki te 18000 (Gb/s) · km, i te mea me te whakarereketanga PDM-QPSK me te hangarau kitenga hono, ka taea te whakapai ake i tenei tohu22/0 (km2) SD-FEC whiwhi 9.5dB).
Ko te tapahi-mata 7-matua x 3-aratau mokowā wehenga multiplexing muka (SDM) kua tutuki te kaha tuku o 15.6Pb / s · km (te kaha muka kotahi o 1.53Pb / sx tawhiti tuku o 10.2km) i roto i te taiao taiwhanga i roto i te hononga ngoikore inter matua crosstalk mana (<-40dB/km).
Kia tata ki te rohe o Shannon, me uru tahi nga punaha hou ki te hanga i te ahua o te ahua (PS-256QAM, ka eke ki te 0.8dB te hua hanga), te whakaorite o te whatunga neural (NL te pai o te utu i pai ake ma te 37%), me te tohatoha Raman amplification (DRA, whiwhi slope tika ± 0.5dB) nga hangarau Q4 o te kawe PDM-40000000000000. 2dB (mai i te 12dB ki te 14dB), ka whakaroa i te manawanui o te OSNR ki te 17.5dB/0.1nm (@ BER=2e-2).
Te wa tuku: Hune-12-2025