Kev txhim kho tom qab ntawm multimode optical fiber ntau
Tso lus
Cov xwm txheej saum toj no tau txuas ntxiv mus txog thaum nruab nrab mus rau lig 1990s. Nyob rau hauv xyoo tas los no, nrog kev txhim kho txuas ntxiv ntawm cheeb tsam hauv cheeb tsam sib kis ceev, 50 μ m core inch multimode fiber ntau tau nyiam ntau thiab ntau dua. Txij li xyoo 1997, cov kev sib txuas hauv cheeb tsam hauv cheeb tsam tau txhim kho mus rau 1Gb / s, thiab 62.5 / 125 μ m multimode fiber optic nrog LED vim lub teeb ci tsis tuaj yeem ua tau raws li qhov yuav tsum tau muaj nrog bandwidth ntawm ntau pua megabits. Piv nrog rau 62.5 / 125 μ m, 50 / 125 μ m fiber ntau muaj cov lej me me thiab cov core inch, bandwidth siab dua, thiab tuaj yeem txo cov nqi tsim khoom los ntawm ib feem peb. Yog li ntawd, kev lag luam hauv ntau lub teb chaws tau thov kom rov ua dua 50/125 μ m multimode fiber ntau. Tom qab kev tshawb fawb thiab ua qauv qhia, Lub Koom Haum Thoob Ntiaj Teb rau Standardization tau tsim cov qauv sib xws. Txawm li cas los xij, xav tias ntau tus lej ntawm 62.5 / 125 μ m multimode fibers tau raug teeb tsa thiab siv hauv cov chaw hauv cheeb tsam yav dhau los, IEEE802.3z Gigabit Ethernet tus qauv qhia tau hais tias ob qho tib si 50/125 μ m thiab 62.5 / 125 μ m multimode fibers tuaj yeem siv los ua kev sib kis xov xwm rau 1Gbit / s Ethernet. Tab sis rau cov tes hauj lwm tshiab, 50/125 μ m multimode fiber yog feem ntau nyiam. Lub reintroduction ntawm 50/125 μ m multimode fiber ntau tau hloov lub dominance ntawm 62.5/125 μ m multimode fiber nyob rau hauv lub multimode fiber ntau. Ua raws li cov qauv saum toj no, Corning tau tshaj tawm qhov kev tshaj tawm ntawm ob lub fibers multimode tshiab nyob rau lub Cuaj Hli 1998. Thawj hom yog InfiniCor300, uas tuaj yeem xa 300 meters ntawm 850nm wavelength thiab 550 meters ntawm 1300nm wavelength ntawm tus nqi ntawm 1Gb / s raws li 62.5/ 125 μm qauv. Hom thib ob yog InfiniCor600, uas tuaj yeem xa mus txog 600 meters ntawm ob qho tib si 850nm thiab 1300nm wavelengths ntawm tus nqi ntawm 1Gb / s raws li 50/125 μ m tus qauv.
