Ntawm cov OPGW optical cables siv nyob rau hauv kuv lub teb chaws lub hwj chim system, ob hom tseem ceeb, G.652 pa ib hom fiber ntau thiab G.655 non-zero dispersion hloov fiber ntau, yog cov feem ntau siv. Tus yam ntxwv ntawm G.652 ib hom fiber ntau yog tias cov fiber ntau dispersion me me heev thaum lub sijhawm ua haujlwm wavelength yog 1310nm, thiab qhov sib kis tau tsuas yog txwv los ntawm kev txo qis ntawm cov fiber ntau. Lub qhov rais 1310nm ntawm G.652 fiber core feem ntau yog siv los xa cov ntaub ntawv kev sib txuas lus thiab automation. G.655 optical fiber muaj qis dispersion nyob rau hauv 1550nm qhov rais qhov rais ua hauj lwm wavelength cheeb tsam thiab feem ntau yog siv los xa cov ntaub ntawv tiv thaiv.
G.652A thiab G.652B optical fibers, tseem hu ua cov pa ib hom optical fibers, yog tam sim no siv dav siv fiber ntau. Nws qhov kev pom zoo ua haujlwm wavelength yog 1310nm cheeb tsam, thiab 1550nm cheeb tsam kuj siv tau. Txawm li cas los xij, vim muaj qhov sib txawv loj hauv cheeb tsam no, qhov kev sib kis tau raug txwv rau li 70 ~ 80km. Yog hais tias kev sib kis ntev ntawm tus nqi ntawm 10Gbit / s lossis siab dua yog xav tau nyob rau hauv 1550nm cheeb tsam, yuav tsum tau them nyiaj dispersion. G.652C thiab G.652D optical fibers yog raws li G.652A thiab B feem. Los ntawm kev txhim kho cov txheej txheem, qhov attenuation hauv cheeb tsam 1350 ~ 1450nm tau txo qis heev, thiab kev ua haujlwm wavelength txuas ntxiv mus rau 1280 ~ 1625nm. Tag nrho cov muaj bands yog loj dua cov pa ib hom fibers. Fiber optics tau nce ntau dua ib nrab.
G.652D fiber ntau hu ua wavelength range txuas ib hom fiber ntau. Nws cov khoom yog tib yam li G.652B fiber ntau, thiab cov coefficient attenuation yog tib yam li G.652C fiber ntau. Ntawd yog, lub kaw lus tuaj yeem ua haujlwm nyob rau hauv 1360 ~ 1530nm band, thiab muaj kev ua haujlwm wavelength ntau yog G .652A, nws tuaj yeem ua tau raws li qhov xav tau ntawm kev loj-muaj peev xwm thiab high-density wavelength division multiplexing thev naus laus zis hauv nroog loj network. Nws tuaj yeem khaws cov peev txheej ua haujlwm loj loj rau kev sib txuas kho qhov muag, txuag kho qhov muag cable peev thiab txo cov nqi tsim kho. Ntxiv mus, cov polarization hom dispersion coefficient ntawm G.652D fiber ntau yog nruj dua li ntawm G.652C fiber ntau, ua rau nws tsim nyog rau kev sib kis mus ntev.
Qhov kev ua tau zoo ntawm G.656 fiber ntau tseem tsis yog xoom dispersion fiber. Qhov sib txawv ntawm G.656 optical fiber thiab G.655 optical fiber yog tias (1) nws muaj kev ua haujlwm dav dav. Kev khiav hauj lwm bandwidth ntawm G.655 optical fiber yog 1530 ~ 1625nm (C + L band), thaum kev khiav hauj lwm bandwidth ntawm G.656 optical fiber yog 1460 ~ 1625nm (S + C + L band), thiab tuaj yeem nthuav dav tshaj 1460 ~ 1625nm yav tom ntej, uas tuaj yeem siv tag nrho cov peev xwm ntawm cov bandwidth loj ntawm quartz iav fiber ntau; (2) Lub dispersion txoj kab nqes me me, uas tuaj yeem txo qhov dispersion ntawm DWDM system Cov nqi them nyiaj. G.656 optical fiber yog ib qho uas tsis yog xoom dispersion hloov kho qhov muag fiber ntau nrog txoj kab nqes dispersion ntawm qhov pib xoom thiab kev ua haujlwm wavelength ntau yam npog S + C + L band rau broadband optical kis tau tus mob.
Xav txog kev hloov kho yav tom ntej ntawm kev sib txuas lus, nws raug pom zoo kom siv cov fibers optical ntawm tib lub subtype hauv tib lub cev. Los ntawm kev sib piv ntawm ntau yam tsis xws li chromatic dispersion coefficient, attenuation coefficient, thiab PMDQ coefficient, nyob rau hauv G.652 qeb, PMDQ ntawm G.652D fiber ntau yog ho zoo dua li ntawm lwm yam subcategories thiab muaj kev ua tau zoo tshaj plaws. Noj rau hauv tus account tus nqi zoo, G .652D optical fiber yog qhov kev xaiv zoo tshaj plaws rau OPGW optical cable. Qhov kev ua tau zoo ntawm G.656 optical fiber ntau kuj tseem zoo dua li ntawm C.655 optical fiber ntau. Nws raug pom zoo kom hloov G.655 optical fiber nrog G.656 optical fiber nyob rau hauv qhov project.
