Pali magiredi 5 a fiber multimode: OM1, OM2, OM3, OM4, ndipo tsopano OM5. Kodi nchiyani kwenikweni chimene chimawapangitsa kukhala osiyana?
Pachimake (chikhululukireni pun), chomwe chimasiyanitsa magawo a fiber ndi makulidwe awo, ma transmitters, ndi bandwidth.
Ulusi wa Optical multimode (OM) uli ndi pakati pa 50 µm (OM2-OM5) kapena 62.5 µm (OM1). Pachimake chachikulu chimatanthauza kuti mitundu ingapo ya kuwala imayenda pansi pakatikati pa nthawi imodzi, motero amatchedwa "multimode."
Legacy Fibers
Chofunika kwambiri, kukula kwapakati kwa OM1's 62.5 µm kumatanthauza kuti sikugwirizana ndi magiredi ena a multimode ndipo sikungavomereze zolumikizira zomwezo. Popeza OM1 ndi OM2 onse amatha kukhala ndi ma jekete akunja alalanje (molingana ndi miyezo ya TIA/EIA), nthawi zonse fufuzani nthano yosindikiza pa chingwe kuti muwonetsetse kuti mukugwiritsa ntchito zolumikizira zolondola.
Ulusi woyambirira wa OM1 ndi OM2 onse adapangidwa kuti azigwiritsidwa ntchito ndi magwero a LED kapena ma transmitters. Kuchepetsa kusinthasintha kwa ma LED kumachepetsanso kuthekera kwa OM1 ndi OM2 yoyambirira.
Komabe, kufunikira kowonjezereka kwa liwiro kumatanthauza kuti ma fiber optical amafunikira mphamvu zapamwamba za bandwidth. Lowetsani ma laser-optimized multimode fibers (LOMMF): OM2, OM3 ndi OM4, ndipo tsopano OM5.
Laser-Kukhathamiritsa
OM2, OM3, OM4, ndi OM5 fibers adapangidwa kuti azigwira ntchito ndi vertical-cavity surface-emitting lasers (VCSELs), nthawi zambiri pa 850 nm. Masiku ano, laser-optimized OM2 (monga yathu) ikupezekanso mosavuta. Ma VCSEL amalola kusinthasintha mwachangu kwambiri kuposa ma LED, kutanthauza kuti ulusi wokongoletsedwa ndi laser ukhoza kutumiza zambiri.
Pamiyezo yamakampani, OM3 ili ndi modal bandwidth (EMB) ya 2000 MHz* km pa 850 nm. OM4 imatha kunyamula 4700 MHz * km.
Ponena za chizindikiritso, OM2 imasunga jekete lalalanje, monga tafotokozera pamwambapa. OM3 ndi OM4 onse akhoza kukhala ndi jekete lakunja la aqua (izi ndi zoona ndi zingwe za Cleerline OM3 ndi OM4 patch). OM4 imatha kuwoneka ndi jekete yakunja ya "Erika violet". Mukakumana ndi chingwe chowala cha magenta fiber optic, mwina ndi OM4. Mwamwayi, OM2, OM3, OM4, ndi OM5 onse ndi 50/125 µm ulusi ndipo onse amatha kuvomereza zolumikizira zofanana. Zindikirani, komabe, kuti mitundu yolumikizira imasiyanasiyana. Zolumikizira zina zama multimode zitha kulembedwa kuti "zokongoletsedwa ndi OM3/OM4 fiber" ndipo zitha kukhala zamitundu yamadzi. Standard laser-wokometsedwa multimode zolumikizira akhoza kukhala beige kapena wakuda. Ngati pali chisokonezo, chonde yang'anani cholumikizira makamaka pokhudzana ndi kukula kwapakati. Kufananiza kukula kwapakati ndi gawo lofunikira kwambiri pazolumikizira zamakina, chifukwa zimatsimikizira kuti chizindikirocho chikhalabe chopitilira kudzera pa cholumikizira.
Nthawi yotumiza: Aug-01-2022