OM4 COV PHOOJ YWG NQUAG NUG COV LUS NUG
>> QHIA
Lub Yim Hli 5, 2009 TIA Tus Qauv Sawv Cev tau pov npav thiab pom zoo qhov yuav ntxiv EIA / TIA 492AAAD qib multimode fiber ntau, uas hu ua OM4 fiber.
Cov qeb tshiab no tau yog cov ncauj lus ntawm kev sib tham nyob rau hauv kev lag luam fiber ntau rau ze li 3 xyoo, thiab kev pom zoo los ntawm TIA tso cai cov txheej txheem kev ntsuas thiab kev ntsuas ntawm kev txhim kho bandwidth fiber zoo ib yam li cov uas twb tau ua lag luam los ntawm Corning thiab lwm cov tuam txhab fiber ntau.
>> OM4 YOG DAB TSI?
OM4 yog ib txoj haujlwm kho qhov muag laser, qhov siab bandwidth 50um multimode fiber.
OM4 fiber ntau tsis yog hom fiber ntau tshiab. Txhua qhov chaw tsim hluav taws xob loj tau muag cov fiber ntau nrog cov qauv siv hluav taws xob zoo (EMB) tus nqi sib npaug uas tau teev tseg los ntawm OM4 txij thaum 2005.
Qhov kev hloov pauv yog tias tam sim no muaj tus qauv uas yog tshwj xeeb tsom ntawm cov khoom no. Ua ntej cov txheej txheem txheem ntawm OM4 cov xov tooj hluav taws xob ntau dua tau muag raws li OM3.
Cov tseev kom muaj ntawm OM4 cov qauv zoo ib yam rau OM3 tsuas yog zam qhov tsis suav bandwidth. Ob qho 850nm EMB thiab 850nm dhau mus tsim tawm (OFL) cov bandwidth tau ntau zog los ntawm OM3 cov kev xav tau. Saib cov lus hauv qab no rau cov lus qhia tseeb:
Qhov "OM-" kev faib tawm multimode muaj keeb kwm los ntawm Cov Qauv Txheej Txheem Tshaj Tawm: IEC 11801.
>> VIM LI CAS THIAJ LI 850NM OFL BANDWIDTH Txais nyiaj LOS NTAWM 1500 MHZ * KM RAU 3500 MHZ * KM
Muaj kev ntseeg ntawm qee cov tswvcuab ntawm cov qauv hauv zej zog tias 850nm OFL bandwidth xav tau kho kom haum nrog rau 850nm EMB bandwidth kom ntseeg tau tias qhov siab tshaj plaws ua tau zoo.
Corning tau ua qhov kev sim ntau hauv qhov chaw no thiab tsis pom ib qho kev sib txuam rau cov ntawv no, ntsuas nrog lub miniEMBc bandwidth ntsuas. Yog li ntawd, Corning Ameslikas tau teev cov khoom lag luam nrog 850nm OFL tus nqi ntawm 1500 MHz * km thiab raug thawb kom tus nqi ntawd rau OM4 tus qauv.
Thaum lub sijhawm sib cav qauv, Corning tseem tau sim siv DMD-mask txujci thiab tau pom tias muaj qhov sib txuam ntawm qis 850 nm OFL bandwidths thiab qhov ua haujlwm tsis zoo. Raws li qhov tshwm sim, Corning txhawb kev txiav txim siab kom nce 850nm OFL bandwidth ntawm 1500 MHz * km rau 3500 MHz * km thiaj li tiv thaiv tsis ua tiav rau cov ntsuas uas ntsuas nrog DMD-npog qhov kev ntsuas.
Nws yog vim li no, Corning ntseeg ntseeg tias tsis muaj kev sib txawv hauv Corning's eSX + fiber thiab ClearCurve OM4 cov khoom siv fiber ntau los ntawm qhov kev hloov no.
>> PUAS TUAJ YEEM OM3 TSIS MUAJ KEV TXHAUM-POV THAWJ?
Tsis tau. Yuav luag txhua qhov system yuav tseem ntsib nrog OM3 - suav nrog 40 GbE thiab 100 GbE. Rau 10 GbE, OM3 txhawb nqa 300 meters thiab cov tswv yim rau OM4 txhawb nqa 550 meters. Feem coob ntawm cov lag luam thiab cov ntaub ntawv nruab nrab 10 GbE txuas qhov ntev yog tsawg dua 300 meters yog li OM3 chaw nyob yuav tsum muaj.
Txog 40 GbE thiab 100 GbE, cov qauv qauv tau suav nrog cov hom phiaj rau 100 meters dhau OM3 thiab 125 meters tshaj OM4. Cov kev tshawb fawb pom tau tias kwv yees li 70% ntawm cov kev sib txuas hauv-tsev muaj tsawg dua lossis sib luag li 100 metres. Yog li ntawd, rau ~ 70% cov neeg siv, OM3 tseem yog qhov kev daws teebmeem yav tom ntej txawm tias 40 GbE thiab 100 GbE.
>> THAUM KUV YUAV TSUM TAU UA OM4 FIBER?
Rau cov vaj tse thaj chaw txuas mus txog 600 meters, multimode fiber ntau tus nqi ntawm cov tshuaj. Qhov no yog vim muaj qhov tseeb hais tias nyob rau hauv kev sib txuas ib txwm, tus nqi ntawm cov khoom sib hloov yog ~ 10x tus nqi ntawm cov khoom siv fiber / cable / txuas.
Thaum ib hom fiber ntau yog qhov pheej yig heev, nws yuav tsum tau siv kom muaj nuj nqis 1300nm transceivers uas yog ntxhib 2x - 3x tus nqi ntawm 850nm multimode transceivers.
Los ntawm kev nqis peev me me ntsis nyiaj ntau dua rau qhov ua tau zoo ntawm cov qauv fiber ntau txheej txheem cabling system, cov nyiaj tau los tag nrho tuaj yeem rov sau tau los ntawm kev siv cov cuab yeej siv qis qis. Raws li cov tshuab tsiv mus rau cov nqi siab dua xws li 40 GbE thiab 100 GbE, thawj qhov kev kwv yees qhia tau hais tias transceiver tus nqi txuag nyiaj siv tau los ntawm multimode fiber yuav tsuas loj dua.
Tsis tas li ntawd, Fiber Channel cov tswv cuab nyuam qhuav xaiv tsa OM4 hauv lawv cov kev qhia tshwj xeeb nrog OM4 txhawb nqa 400 meters ntawm 4 Gb / s, 200 meters ntawm 8 Gb / s thiab 130 meters ntawm 16 Gb / s.