Multimode fiber：
Kev sib kis tau ntawm ntau hom fiber ntau ntawm qhov muab nruab nrab. Raws li nws qhov ntsuas xa tawm refractive, nws tuaj yeem muab faib ua hom thiab hloov hom qeeb. Lub zog aperture ntawm cov xov tooj fiber ntau yog 0.2 ± 0.02, cov taub loj / qhov taub yog 50 μ m / 125 μ m, thiab nws cov kis tau sib kis yog bandwidth thiab poob. Raws li muaj ntau pua txoj kev xa mus nyob rau hauv multimode optical fiber, qhov kev tshaj tawm tsis tu ncua thiab pab pawg tus nqi ntawm txhua hom yog txawv, yog li ntawd cov optical fiber muaj nqaim bandwidth, loj dispersion thiab poob loj, uas tsuas yog tsim rau nruab nrab luv luv thiab me me muaj peev xwm optical. kev sib txuas lus fiber ntau.
Cov tub ntxhais qhov taub ntawm multimode fiber yog 62.5 μ m / 125 μ m. lossis 50 μ m / 125 μ m. Muaj 2, 4, 6, 8, 12, 16, 20, 24, 36, 48, 60, 72, 84, 96 cores muaj. Cov khoom siv cable sab nraud sheath muaj xws li hom, hom nplaim taws retardant hom, tsis tshua muaj pa taws halogen-hom yam thiab tsis tshua muaj pa taws halogen-tsis pub nplaim taws hom.
Cov tub ntxhais txoj kab uas hla: ib qho hluav taws xob fiber muaj cov tiv thaiv txheej, txheej txheej thiab ib qho tseem ceeb, tag nrho cov no yog cov cylindrical. Cov taub loj yog hais txog txoj kab uas hla ntawm lub voj voog ntawm txoj kab uas hla. Multimode fiber ntau hais txog cov fiber uas tso cai rau ntau hom kev sib kis.
50/125 μ m thiab 62.5 / 125 μ m multimode fiber ntau hom fiber ntau hauv cov khoom sib txuas lus sib kis, uas 50 μ m thiab 62.5 μ m sawv cev rau cov tub ntxhais txoj kab uas siv los xa cov cim kho qhov muag hauv lub fiber, thaum 125 μ m sawv cev cladding txoj kab uas hla, uas tuaj yeem tiv thaiv tus tub ntxhais thiab txwv txoj kev tawm tsam ntawm lub teeb rau hauv tub ntxhais. Txawm hais tias cov cladding ntau thiab tsawg ntawm ob hom multimode fibers zoo ib yam, cov tub ntxhais sib txawv los ua lawv cov bandwidth sib txawv. Yog li, puas tau ob hom multimode fibers no tov? Dab tsi yog qhov cuam tshuam ntawm kev xa mus rau kev ua haujlwm ntawm optical fiber tom qab sib tov?
Raws li ISO 11801 tus qauv, cov roj ntsha multimode tuaj yeem faib ua om1, om2, OM3, OM4 thiab om5. Ntawm lawv, cov tub ntxhais taub ntawm om1 multimode fiber yog 62,5 μ m, thiab tias ntawm plaub seem ntawm cov fiber ntau fiber ntau yog 50 μ m. Tsib tsib hom ntawm cov xov tooj hluav taws xob sib txawv muaj qhov sib txawv ntawm cov khoom sib kis, sib kis deb thiab cov xim sheath. Qhov me dua qhov taub loj yog, qhov kis tau zoo dua tuaj yeem ua tiav thiab ntev kev sib kis tau.
Vim li cas thiaj yuav tsum tau sib xyaw nrog fiber ntau?
Lub 62.5 μ m multimode kho qhov muag siv hluav taws xob siv cov duab hluav taws xob ntau (LED) ua lub teeb ci thiab feem ntau siv rau 10 / 100Mbps Ethernet.
Nrog cov kev txhim kho txuas ntxiv mus ntawm cov network ceev, multimode fiber nrog LED ua lub teeb ci tsis tuaj yeem ua kom tau raws li kev sib kis yuav tsum tau ntawm high-speed network. Yog li, 50 μ m multimode fiber nrog ntsug kab noj hniav nto emitting laser (VCSEL) raws li lub teeb pom. Piv nrog LED teeb pom, 50 μ m multimode fiber ntau nrog VCSEL hom teeb ci muaj hwj chim siab dua thiab zoo dua tso zis laser. Yog li no, 50 μ m multimode fiber yog siv dav. Txawm hais tias ntau qhov kev sib koom tes loj tau nruab nrog 50 μ m multimode fiber, tseem muaj ntau daim ntawv thov uas yuav tsum siv 62.5 μ m multimode fiber, yog li qhov kev thov rau kev sib xyaw 50 μ m thiab 62.5 μ m multimode fiber kuj tseem nce.
Dab tsi yog cov teeb meem ntawm hybrid multimode fiber ntau?
Muaj ob kis ntawm hybrid multimode fiber, ib qho yog lub teeb los ntawm 62.5 / 125 μ m multimode fiber rau hauv 50/125 μ m multimode fiber, thiab lwm qhov yog lub teeb ntawm 50/125 μ m multimode fiber rau hauv 62.5 / 125 μ m multimode fiber. Raws li muaj nyob hauv daim duab hauv qab no:
Rau thawj kis, 50/125 μ m multimode fiber muaj qhov loj me txoj kab uas hla thiab tau yooj yim txuas nrog 62.5 / 125 μ m multimode fiber. Hauv qhov no, qhov txhaum cai thiab kev sib dhos lub kaum sib txawv yuav tsis cuam tshuam qhov kis ntawm fiber ntau. Txawm li cas los xij, thaum 62.5 / 125 μ m multimode fiber yog sib xyaw nrog 50/125 μ m multimode fiber, vim yog qhov loj dua qhov loj ntawm lub qub, lub teeb nyob rau hauv 62.5 / 125 μ m multimode fiber yuav disperse los ntawm tub ntxhais mus rau cladding ntawm 50/125 μ m multimode fiber, ua rau qee qhov poob. Yog tias cov fiber ntau poob loj, nws tsis pom zoo kom sib xyaw ua ke 62.5 / 125 μ m thiab 50/125 μ m multimode fiber.
Yog li, yuav ua li cas txiav txim siab seb nws puas yuav ua tau los sib xyaw ob hom ntawm cov xov tooj hluav taws xob ntau no thaum uas ua kom muaj kev sib tsoo tsawg? Kev sib koom tes zoo txais ntawm 62.5 / 125 μ m thiab 50/125 μ m multimode fiber ntau yog 0.9db ~ 1.6db. Yog tias qhov poob tiag tiag tshaj qhov dhau ntawm qhov ntau, nws raug nquahu kom tsis txhob sib xyaw 62.5 μ m multimode fiber ntau nrog 50 μ m multimode fiber.
Txawm hais tias qhov sib txuas tsim nyog poob ntawm 50 μ m thiab 62.5 μ m multimode fibers tau raug txiav txim siab, peb tsis tuaj yeem paub tus nqi tshwj xeeb ntawm cov txuas txuas poob ntawm ob lub fiber ntau tsis tau kuaj raws li qhov tseeb qhov sib txuas.
Qhov kev sim qhia tau hais tias txawm hais tias cov laser ntawm 50 μ m thiab 62.5 μ m multimode fiber ntau qhov sib txawv, lawv tau tag nrho. Txawm li cas los xij, nws raug nquahu kom koj tsis txhob sib xyaw ua ke ntawm cov kab sib txawv hauv ib qho txuas. Yog tias qhov poob yog nyob hauv koj qhov ntau, koj tuaj yeem sib tov 50 μ m thiab 62.5 μ m multimode fibers raws li qhov xwm txheej.
Kev sib xyaw ntawm cov multimode fibers nrog sib txawv bandwidths / txawv cov fiber ntau manufacturers
Tsis yog tsuas yog ua tau ntawm 62.5 μ m thiab 50 μ m multimode fiber yog qhov tseem ceeb heev, tab sis kuj tseem muaj kev sib txuam ntawm multimode fibers nrog sib txawv bandwidths lossis los ntawm cov neeg muab khoom sib txawv yuav tsum tau them rau. Yog tias koj xav siv cov tsoos 62.5μ m multimode fiber ntau kom nce bandwidth ntawm tag nrho cov network es tsis txhob sib xyaw nrog 50 μ m multimode fiber, koj yuav tsum xav txog qhov sib xyaw ntawm cov bandwidth sib txawv.
HTF' s cov khoom lag luam zoo tau lees tias, thiab cov khoom siv siv tau yog txawv txawv.
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