Momwe mungayesere ma transceivers a fiber optic?

Ndi chitukuko cha maukonde komanso kupita patsogolo kwaukadaulo, ambiri opanga zida za fiber optic adawonekera pamsika, akuyesera kutenga gawo la intaneti.Popeza opangawa amapanga zinthu zosiyanasiyana, cholinga chawo ndi kupanga zida zapamwamba komanso zogwirizana kuti makasitomala athe kusakaniza zinthu zosiyanasiyana kuchokera kwa opanga osiyanasiyana.Izi makamaka chifukwa cha nkhawa zachuma, popeza malo ambiri opangira deta nthawi zonse amafunafuna njira zotsika mtengo kuti agwiritse ntchito pamanetiweki awo.

Optical transceiversndi gawo lofunikira la maukonde a fiber optic.Akusintha ndikuyendetsa chingwe cha fiber optic kudutsa pamenepo.Amakhala ndi magawo awiri akulu: cholumikizira ndi cholandila.Pankhani yokonza ndi kuthetsa mavuto, ndikofunikira kuti muzitha kuneneratu, kuyesa, ndikupeza komwe mavuto angachitike kapena achitika.Nthawi zina, ngati malumikizidwewo sakukwaniritsa kuchuluka kwa zolakwika zomwe zikuyembekezeredwa, sitingadziwe poyang'ana koyamba kuti ndi gawo liti lomwe likuyambitsa vutoli.Itha kukhala chingwe, transceiver, wolandila kapena zonse ziwiri.Nthawi zambiri, zomwe zafotokozedwazi ziyenera kutsimikizira kuti wolandila aliyense azigwira ntchito moyenera ndi chotumizira chilichonse choyipa kwambiri, ndipo mosemphanitsa, chotumizira chilichonse chimapereka chizindikiritso chokwanira kuti chinyamulidwe ndi wolandila zoyipa kwambiri.Njira zoipitsitsa nthawi zambiri zimakhala zovuta kuzifotokoza.Komabe, nthawi zambiri pamakhala masitepe anayi oyesa magawo a transmitter ndi olandila a transceiver.

Poyesa gawo la transmitter, kuyezetsa kumaphatikizapo kuyesa kutalika kwa mawonekedwe ndi mawonekedwe a chizindikirocho.Pali njira ziwiri zoyesera ma transmitter:

Kutulutsa kwa kuwala kwa transmitter kuyenera kuyesedwa mothandizidwa ndi ma metrics angapo owala, monga kuyesa chigoba, optical modulation amplitude (OMA), ndi chiŵerengero cha kutha.Yesani kugwiritsa ntchito kuyezetsa kwa chigoba cha diso, njira yodziwika bwino yowonera ma transmitter waveform ndikupereka chidziwitso chokhudza magwiridwe antchito onse.Pachithunzi cha diso, mitundu yonse ya ma data imayikidwa pamwamba pa wina ndi mzake pa mulingo wofanana wa nthawi, nthawi zambiri zosakwana ma bits awiri m'lifupi.Gawo lolandira mayeso ndilo gawo lovuta kwambiri la ndondomekoyi, koma palinso njira ziwiri zoyesera:

Gawo loyamba la mayeso ndikutsimikizira kuti wolandila akhoza kutenga chizindikiro chosauka ndikuchitembenuza.Izi zimachitika potumiza kuwala koyipa kwa wolandila.Popeza ichi ndi chizindikiro cha kuwala, chiyenera kuyesedwa pogwiritsa ntchito miyeso ya jitter ndi kuwala.Mbali ina ya mayesero ndi kuyesa kuyika kwa magetsi kwa wolandira.Pa sitepe iyi, mitundu itatu yoyezetsa iyenera kuchitidwa: kuyezetsa chigoba cha maso kuti muwonetsetse kutseguka kwakukulu kwa maso, kuyesa kwa jitter kuyesa mitundu ina ya kuchuluka kwa jitter ndi kuyezetsa kulekerera kwa jitter, ndikuyesa kuthekera kwa wolandila kutsata jitter mkati mwake. loop bandwidth.