Raws li ITU-T Kev Pom Zoo cov ntsiab lus, ib hom fiber ntau tuaj yeem muab faib ua G.652 (kev tawg tsis hloov ua hom fiber ntau), G.653 (dispersion hloov mus rau fiber ntau), G.654 (txiav lub cev ntev ntawm lub ntsej muag hloov fiber ntau), G. 655 (tsis yog xoom dispersion hloov pauv fiber ntau), G. 656 (qis qis tsis yog xoom dispersion hloov pauv fiber ntau), thiab G.657 (khoov tiv fiber ntau) ib hom fiber ntau. Ntawm lawv, G.652 thiab G.655 ib hom fiber ntau yog cov hom hom ntau. Daim ntawv no yuav piav qhia txog kev faib tawm thiab qhov sib txawv ntawm ob hom fiber ntau hauv cov ncauj lus kom ntxaws.
Taw qhia ntawm G.652 optical fiber
G. 652 fiber ntau yog siv ntau hom fiber ntau, uas yog hu ua 1310nm ib hom fiber ntau nrog kev ua haujlwm zoo tshaj plaws, tseem hu ua dispersion tsis muaj fiber ntau. Raws li kev txhim kho qhov ntsuas qhov tseem ceeb ntawm cov tub ntxhais kawm fiber ntau, nws tuaj yeem faib ua cov kab hluav taws xob sib txuas ua ke thiab cov muaj kev nyuaj siab fiber ntau. Qhov ua tau zoo ntawm ob hom fiber ntau tau zoo heev. Cov qub yog yooj yim rau kev tsim khoom, tab sis loj heev macro khoov poob thiab micro khoov poob yog me ntsis loj dua nyob rau hauv 1550 nm wavelength thaj av; lub tom kawg yog me ntsis loj dua hauv kev txuas poob.
Cov cim tseem ceeb
1. Attenuation: ITU-T G.652 pom zoo tias qhov attenuation tas mus li ntawm optical fiber ntau hauv 1310nm qhov rais thiab 1550nm qhov rais yuav tsum tsawg dua 0.5db / km thiab 0.4db / km feem. 1310 lub qhov rai feem ntau nyob hauv thaj tsam ntawm 0.3-0.4db / km, nrog tus nqi raug rau ntawm 0.35db / km; 1550 qhov rai feem ntau nyob hauv thaj tsam ntawm 0.17-0.25db / km, nrog tus nqi raug ntawm 0.20db / km.
2. Kev tawg yooj yim: qhov tso cai ntau ntawm xoom dispersion wavelength yog 1300 ~ 1324nm. Cov dispersion coefficient yog qhov zoo ntawm 1550 nm. Ntawm 1550nm, cov nqi ntawm cov dispersion coefficient D yog 17ps / (nm · km), thiab tus nqi siab feem ntau yog tsawg dua 20ps / (nm · km).
3. PMD: ITU-T pom zoo tias PMD coefficient ntawm G.652 fiber ntau tsawg dua 0.5ps / (km) ^ 1/2, uas yog, PMD ntawm 400km fiber ntau yog 10ps. Txawm li cas los xij, vim muaj qhov tsis dhau ntawm cov txheej txheem cov txheej txheem nyob rau lub sijhawm ntawd, PMD coefficient ntawm qhov kev tso ua ke thaum sawv ntxov yuav tau loj dua.
4. Txoj kab uas hla ntawm txoj kab uas hla: hom teb txoj kab uas hla ntawm 1310nm yog 8.6 ~ 9.5 μ m, thiab qhov sib txawv ntau tshaj tsis tau tshaj exceed 10%. Ntawm 1550nm, hom kab uas hla lub cheeb tsis tau teev hauv ITU-T kev pom zoo, tab sis feem ntau nws loj dua 10.3 μ m.
G. 652 ib hom fiber ntau muaj peev xwm muab faib ua plaub hom: G.652A, G.652B, G. 652C thiab G. 652D, thiab nws cov tub ntxhais ntev li ntawm 8 μ m txog 10 μ m. Ntawm lawv, G.652A thiab G.652B ib hom fiber ntau muaj xoom dispersion wavelength ze 1310nm, uas zoo heev rau 1310nm band daim ntaub ntawv. Vim tias nws cov dej nqus, G.652A thiab G.652B ib hom fiber ntau tsis haum rau WDM kev siv. G. 652C thiab G. 652D ib hom cov roj carbon fiber ntau muaj cov kab hluav taws xob qis dua ntawm 1550nm thiab tshem tawm cov dej nqus dej siab nyob ze 1380nm. Lawv tuaj yeem ua haujlwm hauv 1360nm ~ 1530nm los txhawb nqa wavelength faib multiplexing (WDM) kis. Ntawm lawv, G. 652D ib hom fiber ntau yog qhov feem ntau qhov ntsuas cov yeeb yaj kiab ib hom fiber ntau hauv txhua qib G.652, thiab nws tuaj yeem ua tau zoo mus rau hauv qab. Nws yog cov kev tshaj tawm tsis tuaj yeem hloov kho ib hom fiber ntau tau thov rau tus txiv neej nyob rau tam sim no, uas tsis txawv ntawm qhov tseeb G.652 fiber ntau hauv cov qauv. Daim duab hauv qab no teev cov kev txwv qhov yooj yim ntawm plaub hom G.652 ib hom fiber ntau.
G.652.A | G.652.B | G.652.C | G.652.D | |
Wavelength ntau | 1310nm-1550nm | 1310nm-1625nm | 1310nm-1625nm | 1310nm-1625nm |
Qhov siab tshaj plaws coeuation coefficient | 1310nm ： 0.5dB / km 1550nm ： 0.4dB / km | 1310nm ： 0.4dB / km 1550nm ： 0.35dB / km 1625nm ： 0.4dB / km | 1310nm ~ 1625nm ； 0.4dB / km 1383 nm ± 3 nm ： 0.4dB / km 1550nm ： 0.3dB / km | 1310nm ~ 1625nm ： 0.4dB / km 1383nm ± 3nm ： 0.4dB / km 1530-1565nm ： 0.3dB / km |
Thov | Txhawb nqa 10G thiab 40G kis (10G ntau kis Qhov kev thauj mus los yog 40 km). | Txhawb siab kis tus nqi Cov ntawv thov, xws li 10G kis. | Nws zoo sib xws rau daim ntawv thov ntawm G.652. Ib hom fiber ntau, tab sis nws kis kis tau tuaj yeem txuas ntxiv rau E, S thiab l band, uas yog qhov haum rau CWDM kis. | Nws zoo sib xws rau daim ntawv thov ntawm G.652. B tib hom fiber ntau, tab sis nws kis kis tau tuaj yeem txuas ntxiv rau E thiab S band, uas yog qhov tsim nyog rau CWDM kis. |
E band ： Lub suab sib tshooj yog 1360nm ~ 1460nm。 S band ： Lub wavelength ntau yog 1460nm ~ 1530nm。 C band band Qhab ntaus nkauj ， Lub suab sib tshooj yog 1530nm ~ 1565nm。 L band ： Lub suab sib tshooj yog 1565nm ~ 1625nm。 | ||||
G. 652 optical fiber yog qhov feem ntau siv fiber ntau kho qhov muag. Tam sim no, ntxiv rau FTTH, yuav luag txhua qhov kho qhov muag siv nyob rau hauv thaj chaw deb thiab thaj chaw yog G.652 optical fiber.
Los ntawm lub zog faib ntawm lub teeb, lub teeb liab kho qhov muag nyob rau hauv ib hom fiber ntau tsis yog kis tau hauv tub ntxhais xwb, tab sis kuj nyob rau hauv kev sib tsuam. Nws tuaj yeem pom los ntawm attenuation coefficient daim duab ntawm cov paib ib hom fiber ntau uas qhov attenuation ntawm lub fiber yog me me ntawm 1310nm thiab 1550nm, thiab 1310nm thiab 1550nm kuj tseem yog ob qhov feem ntau siv wavelength windows ntawm ib hom fiber ntau.
G. 655 ib hom fiber ntau hom
Txij li cov dispersion ntawm G.655 ib hom fiber ntau ze rau xoom tab sis tsis sib npaug ntawm xoom ntawm 1550nm, nws tseem hu ua tsis-xoom dispersion hloov pauv fiber ntau lossis NZDSF (tsis yog xoom dispersion hloov fiber ntau).
Piv nrog rau G.652 ib hom fiber ntau, G.655 ib hom fiber ntau muaj qis dua kev faib tawm hauv C-band (1530nm ~ 1565nm). Hauv cov qhab no, qhov ua haujlwm ntawm qhov kho qhov muag ntxiv tau tuaj yeem nqa mus rau hauv kev ua si tag nrho, thiab cov cheeb tsam tseem ceeb ntawm lub fiber ntxiv loj dua. Raws li kev txhim kho kev hloov pauv hloov ib hom fiber ntau, G.655 ib hom fiber ntau muaj peev xwm sib npaug plaub yoj sib xyaw thiab lwm cov teebmeem uas tsis txuas ntxiv. G.655 ib hom fiber ntau txhawb qhov nrug ntev dua thiab lub peev xwm loj dua tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm qhov ntom ntom hluav taws xob sib faib ntau yam (DWDM) kis.
G. 652 thiab G.655 ib hom fiber ntau: yuav ua li cas xaiv?
G. 652 tib hom fiber ntau feem ntau siv hauv LAN, txiv neej, nkag tau rau hauv lub network thiab CWDM kis. Ntawm lawv, WDM kis tau tus mob yog ib qho kev lag luam zoo thiab muaj txiaj ntsig zoo. Feem ntau, G.652 ib hom fiber ntau tsis muaj lub teeb liab kho qhov muag tau siv rau luv xa mus. G.655 ib hom fiber ntau yog qhov thib ob hom fiber ntau hauv cov av hauv av, uas yog tus yam ntxwv tsis tshua muaj tawg (suav nrog kev tawg thiab polarization hom dispersion), thiab feem ntau xa mus rau cov xa xov sib txuas ntev thiab DWDM kis network.
G. 652 ib hom fiber ntau thiab nws hloov kho G.657 ib hom fiber ntau yog tus qauv qis hom fiber ntau, uas zoo heev rau luv luv kis nrog kis tus nqi tsawg dua 10Gbps. Yog tias koj xav tau qhov kis tau tus mob siab dua 10Gbps lossis qhov ua tau zoo dua qhov kev xa mus ntev, G.655 tib hom fiber ntau yog qhov kev xaiv zoo tsis hais tus nqi dab tsi.
G. 655 fiber ntau hloov xoom dispersion taw tes rau 1550 hloov G.653, uas tshem tawm plaub nthwv dej sib xyaw thiab yog qhov tsim nyog rau WDM system. G. 652 fiber ntau yog cov tshuaj siv fiber ntau, uas muaj ob lub qhov rais ntawm 1310nm thiab 1550nm. Thaum 1310nm, qhov kev sib cais me me tab sis tus attenuation yog qhov loj, thiab ntawm 1550nm, qhov attenuation yog me me tab sis qhov kev faib tawm yog loj. Yog li no, hom fiber ntau tuaj yeem pom qhov txawv los ntawm kev siv hluav taws xob fiber dispersion ze ze 1550nm.
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