Kulankhulana kogwirizana kwa kuwala: gawo la kuwala

Kugwirizanakulankhulana kwa kuwala: gawo la kuwala
Kulumikizana kogwirizana sikungodalira momwe kuwala kulili kowala, komanso komwe gawo la kuwala lili, ndipo kumagwiritsanso ntchito ma polarizations awiri ozungulira. Mwanjira imeneyi, chidziwitso chochulukirapo chikhoza kuyikidwa mu wavelength yomweyo, ndipo mtunda wotumizira ukhozanso kukhala wautali.
1, gwero lowala bwino: laser yopitilirabe, koma imafuna kukhazikika kwambiri
Gwero la kuwala mu kulumikizana kogwirizana likadali la laser yopitilira ya CW. Si laser yoyendetsedwa ndi pulsed kapena LED, koma kutulutsa kosalekeza kwa kuwala kokhazikika ngati mafunde onyamula kuti asinthidwe pambuyo pake. Poyerekeza ndi CWgwero la kuwalaMu ma module afupiafupi a kuwala, pamafunika zofunikira zambiri. Chofunika si kungodziwa ngati mphamvu ndi yokwanira, komanso ngati ma frequency ayenera kukhala okhazikika komanso phokoso la gawo liyenera kukhala lotsika. Chifukwa chake, magwero owunikira ogwirizana amatha kumvedwa ngati 'optical reference' yokhazikika. Ikadali laser yopitilira, koma imafuna kukhazikika kwakukulu.
2, Kusinthasintha kogwirizana: Sikofanana ndi modulator ya EML
Kapangidwe ka EML ndiLaza ya DFB+EAM electroabsorbent modulator. EAM ndi yomwe imasintha mphamvu ya kuyamwa kuti kuwala kotuluka kukhale kowala kapena kwakuda. Chifukwa chake, modulator mu EML imachita makamaka modulation ya mphamvu. Coherent modulation ndi yosiyana. Nthawi zambiri imagwiritsa ntchitoChowongolera cha IQ. IQ modulator sikuti imangopangitsa kuwala kukhala kowala kapena kwakuda, koma imagawa kuwala kosalekeza m'njira za I ndi Q, imawongolera zigawo ziwiri za orthogonal phase zomwe zili kutali madigiri 90, kenako imapanga zotuluka. Mwanjira imeneyi, kuwala kotuluka kumatha kunyamula chidziwitso cha amplitude ndi phase nthawi imodzi.
3, Kuchepetsa mphamvu kwa magetsi: kugwiritsa ntchito kuwala kwa oscillator yakomweko kuti muwerenge gawo lonselo
PD wamba imatha kuwona kuwala kokha ndipo singathe kuwona gawo mwachindunji. Kuti muwerenge gawolo molumikizana bwino, muyenera kuyika chizindikiro chowunikira chotchedwa LO, laser ya oscillator yapafupi, yomwe imayenera kuyikidwa. Malekezero olandira amatumiza kuwala kwa chizindikiro chotumizidwa ndi kuwala kwa oscillator yapafupi mu chosakanizira cha kuwala. Malekezero awiri a kuwala amasokoneza, ndipo zotsatira za kusokoneza zimagwirizana ndi kusiyana kwa gawo pakati pawo. Pambuyo pake, chowunikira cholinganiza bwino chimasintha zotsatira za kusokoneza kumeneku kukhala chizindikiro chamagetsi. Ndi kuwala kwa oscillator yapafupi, malekezero olandira amatha kudziwa kuchuluka kwa ngodya yomwe kuwala kwa chizindikirochi kumachotsedwa poyerekeza ndi kuwala kowunikira.
4, Malo mu AIDC: Kutalika kumayang'anabe IM-DD, DCI imayang'ana kwambiri mgwirizano
Malo omveka bwino kwambiri olumikizirana bwino m'malo osungira deta a AI ndi DCI, yomwe imayimira Data Center Interconnection. Ndiko kuti, kulumikizana mwachangu pakati pa malo osungira deta, mapaki, komanso m'mizinda.
Komabe, IM-DD ikadali ndi ubwino wa mtengo ndi mphamvu pa kulumikizana kwafupipafupi mkati ndi pakati pa makabati. Ma module a 800G ndi 1.6T afupifupi adzagwiritsabe ntchito njira yomweyo monga EML, silicon optics, PAM4, PD, ndi TIA. Dongosolo logwirizana lili ndi zigawo zambiri, mphamvu zambiri zimagwiritsidwa ntchito, komanso DSP yolemera, ndipo silidzalowa m'malo mwa ma module afupifupi.