Mukutsvaga huwandu hwepamusoro uye kureba kwekutapurirana chinhambwe mune zvemazuva ano optical communication masisitimu, ruzha, sechidziviriro chakakosha chemuviri, chagara chichimanikidza kuvandudzwa kwekuita.
MuchimiroEDFAerbium-doped fiber amplifier system, imwe neimwe yekuona yekufambisa span inogadzira ingangoita 0.1dB yeakaunganidzwa ega emission ruzha (ASE), iyo yakadzika midzi muhuwandu husina kurongeka hwekusangana kwechiedza/electronic panguva yekusimudza.
Rudzi urwu rweruzha runoratidza sepicosecond level timing jitter mudura renguva. Zvinoenderana neiyo jitter modhi kufanotaura, pasi pemamiriro ekuparadzira coefficient ye30ps/(nm · km), iyo jitter inowedzera ne12ps kana ichitumira 1000km. Munzvimbo yefrequency, inotungamira kuderera kwechiratidzo-kune-ruzha ratio (OSNR), zvichikonzera kurasikirwa kwekunzwa kwe3.2dB (@ BER=1e-9) mu40Gbps NRZ system.
Dambudziko rakanyanya kuoma rinobva pakubatana kwakasimba kwefiber nonlinear effects uye dispersion - the dispersion coefficient of common single-mode fiber (G.652) muwindo re 1550nm ndeye 17ps / (nm · km), yakasanganiswa ne-nonlinear phase shift inokonzerwa ne self phase modulation (SPM). Kana simba rekuisa richipfuura 6dBm, iyo SPM mhedzisiro ichakanganisa zvakanyanya iyo pulse waveform.
Muchirongwa che960Gbps PDM-16QAM chinoratidzwa mumufananidzo uri pamusoro, kuvhura kweziso mushure mekutapurirwa kwe200km ndeye 82% yekutanga kukosha, uye Q factor inochengetwa pa14dB (inoenderana neBER ≈ 3e-5); Kana chinhambwe chawedzerwa kusvika ku400km, iyo yakasanganiswa mhedzisiro yecross phase modulation (XPM) uye ina wave mixing (FWM) inoita kuti dhigirii rekuvhura ziso ridonhe zvakanyanya kusvika ku63%, uye chiyero chemhosho yehurongwa chinodarika chisarudzo chakaoma FEC kukanganisa kukanganisa muganhu we10 ^ -12.
Zvakakosha kucherechedza kuti frequency chirp mhedzisiro yedirect modulation laser (DML) ichawedzera kuipa - iyo alpha parameter (linewidth enhancement factor) kukosha kweiyo DFB laser iri pakati pe3-6, uye nekukurumidza kuchinja kwayo frequency inogona kusvika ± 2.5GHz (inoenderana nekuchirp parameter C = 2.5 GHz / mA inoguma neapo, mhedzisiro yemA parizvino) kuwedzera kwehuwandu hwe38% (cumulative dispersion D · L=1360ps/nm) mushure mekutapurirwa kuburikidza ne80km G.652 fiber.
Channel crosstalk mu wavelength division multiplexing (WDM) masisitimu anoumba zvipingamupinyi zvakadzika. Tichitora iyo 50GHz chiteshi spacing semuenzaniso, simba rekukanganisa rinokonzerwa neina wave mixing (FWM) ine hurefu hunoshanda Leff ingangoita 22km mune akajairwa optical fibers.
Channel crosstalk mu wavelength division multiplexing (WDM) masisitimu anoumba zvipingamupinyi zvakadzika. Tichitora iyo 50GHz chiteshi spacing semuenzaniso, hurefu hunoshanda hwesimba rekukanganisa rinogadzirwa neina wave mixing (FWM) ndeye Leff = 22km (inoenderana nefiber attenuation coefficient α = 0.22 dB/km).
Kana simba rekuisa richiwedzerwa kusvika + 15dBm, iyo crosstalk level pakati pematanho ari padyo inowedzera ne7dB (inoenderana ne -30dB baseline), ichimanikidza sisitimu kuti iwedzere kumberi kukanganisa kururamisa (FEC) redundancy kubva ku7% kusvika 20%. Simba rekufambisa simba rinokonzerwa nekusimudzirwa kweRaman scattering (SRS) rinokonzera kurasikirwa kweinenge 0.02dB pakiromita mumatanho akareba ewavelength, zvichiita kuti kunyura kwesimba kunosvika 3.5dB muC+L band (1530-1625nm) system. Chaiyo nguva yekutsvedza muripo inodiwa kuburikidza neakasimba kuwana yakaenzana (DGE).
The system performance limit yeiyi mhedzisiro yemuviri yakasanganiswa inogona kuverengerwa ne bandwidth kureba chigadzirwa (B · L): iyo B · L yeakajairika NRZ modulation system muG.655 fiber (dispersion compensated fiber) inosvika 18000 (Gb / s) · km, nepo nePDM-QPSK modulation uye inowirirana yekuona tekinoroji, iyi chiratidzo che0 (G2b0 km20) inogona kuva 0 (G. SD-FEC kuwana 9.5dB).
Kucheka-kumucheto 7-core x 3-mode space division multiplexing fiber (SDM) yakawana simba rekutumira re 15.6Pb / s · km (single fiber capacity ye 1.53Pb / sx yekufambisa kureba kwe10.2km) munzvimbo dze laboratory kuburikidza nekubatana kusina simba kwe inter core crosstalk control (<-40d).
Kuti usvike pamuganho weShannon, masisitimu emazuva ano anofanirwa kutora pamwe chete kutora mukana wekuumba (PS-256QAM, kuwana 0.8dB kuumba kuwana), neural network kuenzana (NL muripo wekuita kwakagadziridzwa ne37%), uye kugovera Raman amplification (DRA, kuwana kutsetseka kwe ± 0.5dB) kuwedzera tekinoroji yeQ40 PDM-64QAM kutapurirana ne2dB (kubva pa12dB kusvika 14dB), uye zorodza OSNR kushivirira kusvika 17.5dB/0.1nm (@ BER=2e-2).
Nguva yekutumira: Jun-12-2025