N'ịchụso ikike dị elu na ogologo nnyefe ogologo na sistemụ nkwurịta okwu ngwa anya ọgbara ọhụrụ, mkpọtụ, dị ka njedebe anụ ahụ bụ isi, na-amachibido nkwalite arụmọrụ mgbe niile.
Na-ahụkarịEDFAerbium-doped fiber amplifier usoro, nke ọ bụla ngwa anya nnyefe span na-emepụta ihe dị ka 0.1dB nke kwakọba spontaneous emission mkpọtụ (ASE), nke gbanyere mkpọrọgwụ na quantum random ọdịdị nke ìhè / eletrọn mmekọrịta n'oge usoro nkwalite.
Ụdị mkpọtụ a na-egosipụta dị ka picosecond larịị oge jitter na ngalaba oge. Dị ka amụma jitter nlereanya, n'okpuru ọnọdụ nke mgbasa ozi ọnụọgụ nke 30ps/(nm · km), jitter na-abawanye site 12ps mgbe na-ebufe 1000km. Na ngalaba ugboro ugboro, ọ na-eduga na mbelata nke mgbama ngwa anya-na-mkpọtụ (OSNR), na-ebute mwepu uche nke 3.2dB (@ BER=1e-9) na sistemụ 40Gbps NRZ.
Ihe ịma aka siri ike na-abịa site na njikọ siri ike nke mmetụta na-enweghị eriri na mgbasa ozi - ọnụọgụ nke mgbasa ozi nke eriri otu mode fiber (G.652) na 1550nm window bụ 17ps / (nm · km), jikọtara ya na ngbanwe nke na-adịghị ahụ anya kpatara site na modulation nke onwe (SPM). Mgbe ike ntinye karịrị 6dBm, mmetụta SPM ga-agbagọ n'ụzọ dị ukwuu na pulse waveform.
Na usoro 960Gbps PDM-16QAM nke egosiri na ọnụ ọgụgụ dị n'elu, oghere anya mgbe nnyefe 200km gasịrị bụ 82% nke uru mbụ, na ihe Q na-echekwa na 14dB (nke kwekọrọ na BER ≈ 3e-5); Mgbe ebe dị anya na-agbatị ruo 400km, mmetụta jikọtara ọnụ nke modulation cross-phase (XPM) na ngwakọta anọ nke ikuku (FWM) na-eme ka akara oghere anya na-adaba nke ọma ruo 63%, na njehie usoro ahụ gafere mkpebi siri ike nke FEC njehie mgbazi nke 10 ^ -12.
Okwesiri iburu n'uche na mmetụta chirp ugboro ugboro nke laser modulation ozugbo (DML) ga-akawanye njọ - ụkpụrụ alpha (linewidth enhancement factor) uru nke laser DFB a na-ahụkarị dị na 3-6, na mgbanwe ugboro ya ozugbo nwere ike iru ± 2.5GHz (nke kwekọrọ na paramita chirp C = 2.5GHz/mA, nke na-emepe emepe ugbu a) n'ogo nke 1. 38% (nchịkọta mgbasa D · L = 1360ps / nm) mgbe nnyefe site na eriri 80km G.652.
Ọwa crosstalk na sistemu nkewa nkewa multiplexing (WDM) bụ ihe mgbochi miri emi. Inweta oghere ọwa 50GHz dị ka ọmụmaatụ, ike nnyonye anya sitere na ịgwakọta ebili mmiri anọ (FWM) nwere ogologo Leff dị mma nke ihe dịka 22km na eriri anya nkịtị.
Ọwa crosstalk na sistemu nkewa nkewa multiplexing (WDM) bụ ihe mgbochi miri emi. Inweta oghere ọwa 50GHz dị ka ọmụmaatụ, ogologo nnyonye anya dị irè sitere na ngwakọta mmiri anọ (FWM) bụ Leff = 22km (dakọtara na ọnụọgụ attenuation ọnụọgụ α=0.22 dB/km).
Mgbe ike ntinye aka na-abawanye na + 15dBm, ọkwa crosstalk dị n'etiti ọwa ndị dị n'akụkụ na-abawanye site na 7dB (n'ihe metụtara -30dB baseline), na-amanye usoro iji mee ka mmezigharị njehie na-aga n'ihu (FEC) site na 7% ruo 20%. Mmetụta mbufe ike sitere na mkpali agbasa Raman (SRS) na-ebute mfu nke ihe dịka 0.02dB kwa kilomita na ọwa ogologo ogologo, na-eduga n'itinye ike ruru 3.5dB na usoro C + L band (1530-1625nm). A na-achọ nkwụghachi mkpọda ezigbo oge site na ihe nhata dynamic gain (DGE).
Enwere ike ịkọwa oke arụmọrụ nke mmetụta anụ ahụ ndị a site na ngwaahịa bandwidth dị anya (B · L): B · L nke sistemu NRZ na-ahụkarị na G.655 fiber (fibre dispersion charged fiber) bụ ihe dịka 18000 (Gb / s) · km, ebe yana PDM-QPSK modulation na teknụzụ nchọpụta coherent, enwere ike imeziwanye ihe ngosi a ka ọ bụrụ 280000 EC (SDGb-00000 EC). 9.5dB).
The ọnwụ-ọnụ 7-isi x 3-mode ohere nkewa multiplexing eriri (SDM) enwetawo a nnyefe ikike nke 15.6Pb / s · km (otu eriri ike nke 1.53Pb / sx nnyefe anya nke 10.2km) na laabu gburugburu site na-adịghị ike njikọ inter core crosstalk njikwa (<-40dB / km).
Iji bịaruo oke Shannon, sistemụ ọgbara ọhụrụ kwesịrị ijikọ ọnụ na-akpụzi ihe gbasara nke puru omume (PS-256QAM, nweta 0.8dB ịkpụzi uru), nhazi netwọkụ neural (nkwụghachi ụgwọ NL nke ọma site na 37%), wee kesaa Raman amplification (DRA, nweta slope ziri ezi ± 0.5dB) teknụzụ iji mee ka teknụzụ na-ebuwanye Q-600. 2dB (site na 12dB ruo 14dB), wee mee ka ohere OSNR dị jụụ ruo 17.5dB/0.1nm (@ BER=2e-2).
Oge nzipu: Jun-12-2025