N'ịchụso ikike dị elu na ogologo oge nnyefe na sistemụ nkwukọrịta anya ọgbara ọhụrụ, mkpọtụ, dị ka mmachi anụ ahụ dị mkpa, na-egbochi mmezi arụmọrụ mgbe niile.
N'ihe nkịtịEDFASistemụ amplifier eriri erbium-doped, oge nnyefe anya ọ bụla na-emepụta ihe dị ka 0.1dB nke mkpọtụ mwepụta mberede (ASE), nke sitere na ọdịdị quantum random nke mmekọrịta ọkụ/electron n'oge usoro mmụba.
Ụdị mkpọtụ a na-apụta dị ka jitter oge ọkwa picosecond na mpaghara oge. Dịka amụma ihe nlereanya jitter si dị, n'okpuru ọnọdụ nke ihe mgbasa nke 30ps/(nm · km), jitter na-abawanye site na 12ps mgbe ọ na-ebuga 1000km. Na mpaghara ugboro ugboro, ọ na-eduga na mbelata na oke mgbaàmà-na-mkpọtụ optical (OSNR), na-ebute mfu mmetụta nke 3.2dB (@ BER=1e-9) na sistemụ NRZ 40Gbps.
Ihe ịma aka siri ike karị na-abịa site na njikọ siri ike nke mmetụta eriri na-abụghị ahịrị na mgbasa - ọnụọgụ mgbasa nke eriri otu ụdị nkịtị (G.652) na windo 1550nm bụ 17ps/(nm · km), yana mgbanwe nke usoro na-abụghị ahịrị nke modulation nke onwe (SPM) kpatara. Mgbe ike ntinye gafere 6dBm, mmetụta SPM ga-agbagọ usoro pulse nke ukwuu.
N'ime sistemụ PDM-16QAM nke 960Gbps egosiri na eserese dị n'elu, oghere anya mgbe nnyefe 200km gasịrị bụ 82% nke uru mbụ, a na-ejikwa ihe Q na 14dB (dakọtara na BER ≈ 3e-5); Mgbe a gbatịkwuru anya ahụ ruo 400km, mmetụta njikọta nke mgbanwe usoro cross phase (XPM) na ngwakọta ebili mmiri anọ (FWM) na-eme ka ogo mmeghe anya daa nke ukwuu ruo 63%, ọnụego njehie sistemụ gafere mkpebi siri ike nke oke mmezi njehie FEC nke 10 ^ -12.
Ọ dị mkpa ịmara na mmetụta nke ugboro ole nke laser modulation direct (DML) ga-aka njọ - uru nke alfa paramita (ihe mgbakwunye linewidth) nke laser DFB nkịtị dị na oke 3-6, mgbanwe ugboro ole ya ozugbo nwere ike iru ± 2.5GHz (dakọtara na paramita chirp C=2.5GHz/mA) na ugbu a modulation nke 1mA, na-ebute ọnụego mgbasa nke pulse nke 38% (mgbasasị mkpokọta D · L=1360ps/nm) mgbe ebufere ya site na eriri G.652 80km.
Usoro mgbasa ozi ọwa na sistemụ multiplexing nkewa wavelength (WDM) bụ ihe mgbochi ndị ka njọ. Site na iji oghere ọwa 50GHz dịka ihe atụ, ike nnyonye anya nke ngwakọta ebili mmiri anọ (FWM) kpatara nwere ogologo Leff dị irè nke ihe dị ka 22km na eriri anya nkịtị.
Njikọta ọwa na sistemụ multiplexing nkewa wavelength (WDM) bụ ihe mgbochi ndị ka njọ. Site na iji oghere ọwa 50GHz dịka ihe atụ, ogologo ike nnyonye anya dị irè nke ngwakọta ebili mmiri anọ (FWM) na-emepụta bụ Leff=22km (nke kwekọrọ na ọnụọgụ eriri attenuation α=0.22 dB/km).
Mgbe ike ntinye ahụ ruru +15dBm, ọkwa mkparịta ụka dị n'etiti ọwa ndị dị nso na-abawanye site na 7dB (ma e jiri ya tụnyere ntọala -30dB), nke na-amanye sistemụ ahụ ịbawanye mgbanwe njehie n'ihu (FEC) site na 7% ruo 20%. Mmetụta mbufe ike nke Raman scattering (SRS) kpatara na-ebute mfu nke ihe dị ka 0.02dB kwa kilomita na ọwa ogologo ogologo, na-eduga na mbelata ike ruo 3.5dB na sistemụ C+L (1530-1625nm). A chọrọ nkwụghachi slope oge n'ezie site na nhazi uru dynamic (DGE).
Enwere ike iji ngwaahịa anya bandwit (B · L) chọpụta oke arụmọrụ sistemụ nke mmetụta anụ ahụ ndị a jikọtara ọnụ: B · L nke sistemụ nhazi NRZ nkịtị na eriri G.655 (eriri akwụsịrị mgbasa) dị ihe dị ka 18000 (Gb/s) · km, ebe site na modulation PDM-QPSK na teknụzụ nchọpụta coherent, enwere ike imeziwanye ihe ngosi a ruo 280000 (Gb/s) · km (@ SD-FEC gain 9.5dB).
Eriri multiplexing nke nwere akụkụ 7-core x 3-mode space division multiplexing fiber (SDM) nke kachasị elu enwetala ikike nnyefe nke 15.6Pb/s · km (ikike otu eriri nke anya nnyefe 1.53Pb/sx nke 10.2km) na gburugburu ụlọ nyocha site na njikwa njikọ dị n'etiti isi na-adịghị ike (<-40dB/km).
Iji ruo n'ókè Shannon, sistemụ ọgbara ọhụrụ kwesịrị ijikọta nhazi ihe gbasara ohere (PS-256QAM, nweta uru nhazi 0.8dB), nha nhata netwọkụ akwara (arụmọrụ ụgwọ NL ka mma site na 37%), na teknụzụ Raman amplification (DRA, gain slope correctity ± 0.5dB) iji mee ka Q factor nke nnyefe otu onye na-ebu 400G PDM-64QAM dịkwuo elu site na 2dB (site na 12dB ruo 14dB), ma belata ndidi OSNR ruo 17.5dB/0.1nm (@ BER=2e-2).
Oge ozi: Jun-12-2025