Raws li ITU-T cov qauv, kev sib txuas lus optical fibers tau muab faib ua 7 pawg: G.651 txog G.657.Qhov txawv ntawm lawv yog dab tsi?
1, G.651 fiber ntau
G.651 yog Multi-mode fiber, thiab G.652 rau G.657 tag nrho yog ib hom fibers.
Cov fiber ntau optical yog tsim los ntawm cov tub ntxhais, cladding thiab txheej, raws li qhia hauv daim duab 1.
Feem ntau lub cheeb ntawm lub cladding yog 125um, txheej txheej (tom qab xim) yog 250um;thiab cov tub ntxhais txoj kab uas hla tsis muaj tus nqi ruaj khov, vim qhov sib txawv ntawm cov tub ntxhais txoj kab uas hla yuav hloov qhov kev ua tau zoo ntawm fiber ntau kis tau tus mob loj.
Daim duab 1. Fiber qauv
Feem ntau cov tub ntxhais txoj kab uas hla ntawm multimode fiber ntau los ntawm 50um mus rau 100um.Kev sib kis tau zoo ntawm cov fiber ntau yog qhov zoo dua qub thaum cov tub ntxhais txoj kab uas hla me dua.Raws li pom hauv daim duab 2.
Daim duab 2. Ntau hom kis tau tus mob
Tsuas yog ib hom kis tau tus mob thaum lub core txoj kab uas hla ntawm lub fiber yog me dua ib tug tej yam nqi, raws li qhia nyob rau hauv daim duab 3, uas dhau los ua ib hom fiber ntau.
Daim duab 3. Ib hom kis tau tus mob
2, G.652 Fiber ntau
G.652 optical fiber ntau yog cov khoom siv kho qhov muag uas siv dav tshaj plaws.Tam sim no, ntxiv rau fiber ntau rau lub tsev (FTTH) cov khoom siv kho qhov muag hauv tsev, cov khoom siv kho qhov muag siv tau ntev thiab cov nroog loj yog yuav luag tag nrho G.652 optical fiber ntau. cov neeg muas zaub xaj hom no feem ntau los ntawm Honwy.
Attenuation yog ib qho tseem ceeb tshaj plaws uas cuam tshuam rau kev sib kis ntawm fiber ntau optical.Lub attenuation coefficient ntawm optical fiber yog cuam tshuam nrog lub wavelength.Raws li pom hauv daim duab 4. Nws tuaj yeem pom los ntawm daim duab tias qhov attenuation ntawm fiber ntau ntawm 1310nm thiab 1550nm yog qhov me me, yog li 1310nm thiab 1550nm tau dhau los ua qhov feem ntau siv wavelength qhov rais rau ib hom fibers.
Daim duab 4. Attenuation coefficient ntawm ib hom fiber ntau
3, G.653 Fiber ntau
Tom qab qhov ceev ntawm kev sib txuas lus kho qhov muag tau nce ntxiv, cov teeb liab kis tau tus mob pib cuam tshuam los ntawm fiber ntau dispersion.Dispersion yog hais txog lub teeb liab distortion (mem tes broadening) tshwm sim los ntawm ntau zaus Cheebtsam los yog txawv hom Cheebtsam ntawm lub teeb liab (mulse) propagating ntawm txawv speeds thiab ncav cuag ib tug tej yam deb, raws li qhia nyob rau hauv daim duab 5.
Daim duab 5. Fiber dispersion
Lub dispersion coefficient ntawm optical fiber kuj muaj feem xyuam rau lub wavelength, raws li qhia nyob rau hauv daim duab 6. Ib hom fiber ntau muaj qhov tsawg tshaj attenuation coefficient ntawm 1550 nm, tab sis cov dispersion coefficient ntawm no wavelength yog loj.Yog li cov neeg tau tsim ib hom fiber ntau nrog qhov sib txawv ntawm 0 ntawm 1550nm.Qhov no zoo li cov fiber ntau yog G.653.
Daim duab 6. Lub dispersion coefficient ntawm G.652 thiab G.653
Txawm li cas los xij, qhov dispersion ntawm optical fiber ntau yog 0 tab sis nws tsis haum rau kev siv lub wavelength division (WDM) systems, yog li G.653 optical fiber raug tshem tawm sai.
4, G.654 Fiber ntau
G.654 optical fiber ntau yog siv nyob rau hauv submarine cable kev sib txuas lus systems.Txhawm rau ua kom tau raws li qhov kev ncua deb thiab muaj peev xwm loj ntawm kev sib txuas lus submarine cable.
5, G.655 Fiber ntau
G.653 fiber ntau muaj xoom dispersion ntawm 1550nm wavelength thiab tsis siv WDM system, yog li tsim muaj fiber ntau nrog me me tab sis tsis xoom dispersion ntawm 1550nm wavelength.Qhov no yog G.655 fiber ntau.G.655 fiber ntau nrog qhov tsawg tshaj plaws attenuation nyob ze ntawm 1550nm wavelength, me me dispersion thiab tsis xoom, thiab tuaj yeem siv rau hauv WDM systems;Yog li ntawd, G.655 fiber ntau tau yog thawj qhov kev xaiv rau cov kab hauv qhov ntev ntev rau ntau tshaj 20 xyoo nyob ib ncig ntawm 2000. Lub attenuation coefficient thiab dispersion coefficient ntawm G.655 fiber ntau yog qhia hauv daim duab 7.
Daim duab 7. Lub dispersion coefficient ntawm G.652/G.653/G.655
Txawm li cas los xij, xws li cov khoom siv kho qhov muag zoo kuj tseem ntsib ib hnub ntawm kev tshem tawm.Nrog rau kev loj hlob ntawm dispersion them nyiaj thev naus laus zis, G.655 fiber ntau tau hloov los ntawm G.652 fiber ntau.Pib txij li xyoo 2005, cov kab ntev ntev tau pib siv G.652 optical fiber ntau rau ntawm qhov loj.Tam sim no, G.655 fiber ntau optical yuav luag tsuas yog siv rau kev saib xyuas ntawm thawj txoj kab ntev.
Muaj lwm qhov laj thawj tseem ceeb vim li cas G.655 fiber ntau raug tshem tawm:
Hom teb txoj kab uas hla ntawm G.655 fiber ntau yog 8 ~ 11μm (1550nm).Hom teb txoj kab uas hla ntawm fibers tsim los ntawm cov tuam txhab fiber ntau sib txawv yuav muaj qhov sib txawv loj, tab sis tsis muaj qhov sib txawv ntawm hom fiber ntau, thiab cov fiber ntau nrog qhov sib txawv loj hauv hom kab kab uas hla yog txuas nrog qee zaum muaj qhov loj attenuation, uas coj tau zoo heev. tsis yooj yim rau kev kho;Yog li ntawd, nyob rau hauv lub cev lub cev, cov neeg siv yuav xaiv G.652 fiber ntau es tsis yog G.655, txawm tias yuav tsum tau ntau dua dispersion nqi them.
6, G.656 Fiber ntau
Ua ntej qhia G.656 optical fiber ntau, cia peb rov qab mus rau lub sijhawm thaum G.655 dominated long-deb lub cev kab.
Los ntawm qhov kev xav ntawm attenuation yam ntxwv, G.655 fiber ntau yuav siv tau rau kev sib txuas lus nyob rau hauv lub wavelength ntau ntawm 1460nm mus rau 1625nm (S + C + L band), tab sis vim hais tias cov dispersion coefficient ntawm cov fiber hauv qab no 1530nm yog heev me me, nws tsis yog. haum rau wavelength division (WDM).) system siv, yog li qhov siv tau wavelength ntau ntawm G.655 fiber ntau yog 1530nm ~ 1525nm (C + L band).
Txhawm rau ua kom 1460nm-1530nm wavelength ntau yam (S-band) ntawm cov khoom siv kho qhov muag kuj tuaj yeem siv rau kev sib txuas lus, sim txo qhov dispersion nqes hav ntawm G.655 optical fiber, uas dhau los ua G.656 optical fiber.Lub attenuation coefficient thiab dispersion coefficient ntawm G.656 fiber ntau yog qhia hauv daim duab 8.
Daim duab 8
Vim tias tsis yog-linear cuam tshuam ntawm fiber ntau optical, tus naj npawb ntawm cov channel nyob rau hauv ntev-ntev WDM systems yuav tsis nce ntau, thaum kev tsim kho tus nqi ntawm lub nroog loj optical fibers kuj tsawg.Nws tsis muaj txiaj ntsig los nce cov xov tooj hauv WDM systems.Yog li, tam sim no qhov ntom ntom wavelength faib (DWDM) ) Feem ntau tseem 80/160 nthwv dej, C + L yoj band ntawm optical fiber ntau txaus kom tau raws li qhov xav tau.Tshwj tsis yog tias cov tshuab ceev ceev muaj qhov yuav tsum tau ua ntau dua rau qhov sib nrug ntawm cov channel, G.656 fiber ntau yuav tsis muaj kev siv loj.
6, G.657 Fiber ntau
G.657 optical fiber ntau yog siv cov fiber ntau optical tsuas yog G.652.Optical cable siv rau FTTH lub tsev uas nyias dua li cov xov tooj, nws yog nrog G.657 fiber ntau sab hauv.Yog tias koj xav tau cov ntsiab lus ntxiv txog nws, pls nrhiav https://www.gl-fiber.com/bare-optical-fiber / los yog email rau [email protected], Ua tsaug!