Raws li peb txhua tus paub, multimode fiber feem ntau muab faib ua OM1, OM2, OM3 thiab OM4. Tom qab ntawd yuav ua li cas hais txog ib hom fiber ntau (SMF)? Qhov tseeb, cov hom ntawm ib hom fiber ntau zoo li ntau qhov sib txawv ntawm multimode fiber. Muaj ob lub hauv paus tseem ceeb rau cov kev ua tshwj xeeb ntawm ib hom kho qhov muag fiber. Ib qho yog ITU-T G.65x series, thiab lwm qhov yog IEC 60793-2-50 (luam tawm raws li BS EN 60793-2-50). Ntau dua li hais txog ob ITU-T thiab IEC cov lus siv, peb tsuas yog lo rau qhov ITU-T G.65x kom yooj yim hauv cov lus no. Muaj 19 qhov sib txawv ib hom kho qhov muag fiber ntau cov ntsiab lus tau txhais los ntawm ITU-T, ntawm cov uas G.652 fiber yog qhov feem ntau siv.
| Npe | Hom |
|---|---|
| ITU-T G.652 | ITU-T G.652.A, ITU-T G.652.B, ITU-T G.652.C, ITU-T G.652.D. |
| ITU-T G.653 | ITU-T G.653.A, ITU-T G.653.B |
| ITU-T G.654 | ITU-T G.654.A, ITU-T G.654.B, ITU-T G.654.C |
| ITU-T G.655 | ITU-T G.655.A, ITU-T G.655.B, ITU-T G.655.C, ITU-T G.655.D, ITU-T G.655.E |
| ITU-T G.656 | ITU-T G.656 |
| ITU-T G.657 | ITU-T G.657.A1, ITU-T G.657.A2, ITU-T G.657.B2, ITU-T G.657.B3 |
G.652 Fiber yog dab tsi?
Ntawm tag nrho cov tib hom fiber ntau hom, G.652 fiber yog nyob deb ntawm cov feem ntau dav ntsia ib hom fiber ntau cable cable thoob ntiaj teb. Yog li cov qeb fiber no tseem hu ua tus qauv SMF. G.652 fiber yog tsim kom muaj qhov xoom-kev tawg nthwv dej nyob ze 1310 nm, yog li ntawd nws yog qhov zoo rau kev ua haujlwm hauv 1310nm band thiab tseem tuaj yeem ua haujlwm ntawm 1550 nm. Thawj cov ntawv luam tawm ntawm G.652 fiber ntau tau tsim hauv xyoo 1984 thiab tam sim no nws muaj plaub subcategories: G.652.A, G.652.B, G.652.C thiab G.652.D. Tag nrho plaub qhov sib txawv muaj tib G.652 tub ntxhais loj me ntawm 8-10 micrometer. Niaj hnub no cov OS2 cov fiber ntau feem ntau yog G.652.C lossis G.652.D, thiab pawg A thiab B tsis tshua siv. Cov lus hauv qab no muab cov attenuation, macrobending poob, polarization-hom dispersion (PMD), thiab hom foob diam (MFD) ntawm G.652 fiber subcategories.
| Specification | G.652.A | G.652.B | G.652.C | G.652.D |
|---|---|---|---|---|
| Attenuation (dB / km) | Tsawg tshaj li 0.5 / 0.4 ntawm 1310 / 1550nm | Tsawg tshaj li 0.4 / 0.35 / 0.4 ntawm 1310/1550 / 1625nm | Tsawg dua 0.4 los ntawm 1310 txog 1625nm, tsawg dua 0.3 ntawm 1550nm thiab ntawm 1383nm, nws yuav tsum tsawg dua li qhov tau teev tseg ntawm 1310nm, tom qab kev laus hydrogen. | |
| Macrobending poob | Tsawg tshaj li 0.5 dB ntawm 1550 nm. | Tsawg tshaj li 0.5 dB ntawm 1625 nm. | ||
| PMD | Tsawg dua 0.5 ps / sqrt (km) | Tsawg dua 0.2 ps / sqrt (km) | Tsawg dua 0.5 ps / sqrt (km | Tsawg dua 0.2 ps / sqrt (km) |
| Nom tswv MFD, min | 8.6 µm | |||
| Nom tswv MFD, max | 9.5 .m | |||
Dab Tsi Dab Tsi Ntawm Qhov Cuav G.652 thiab G.652.D?
G.652.D fiber ntau yog qhov feem ntau subcategory ntawm G.652 fiber. Dab tsi yog qhov txawv ntawm keeb kwm G.652 fiber ntau thiab G.652.D fiber? Piv nrog G.652.A fiber ntau thiab G.652.B fiber, G.652.D fiber tshem tawm qhov dej ntawm qhov dej siab rau tag nrho cov kev ua haujlwm spectrum. Cov ntsiab lus sib xyaw G.652.A thiab G.652.B tsis zoo rau kev siv wavelength-faib multiplexing (WDN) vim tias muaj qhov siab ua haujlwm hauv thaj tsam E-band (1360-1460 nm), uas yog dej ncov band. G.652.D fiber tau tsim tshwj xeeb txo qis dej siab ntawm 1383nm nthwv dej qhov ntev. Yog li G.652.D fiber ntau cable siv tau rau thaj tsam wavelength 1310 nm thiab 1550 nm, thiab txhawb kev xa xov kis Coarse WDM (CWDM).
Daim duab 1: Qhov sib txawv ntawm cov keeb kwm G.652 fiber ntau thiab G.652.D fiber.
Txawm hais tias ob qho tib si G.652.C thiab G.652.D muaj cov dej siab siab ntawm 1383 nm, qhov tseeb G.652.D fiber ntau qhia tau zoo dua PMD kev ua tau zoo dua G.652.C fiber, uas yog 0.2 ps / sqrt (km) nyob rau hauv G.652.D vs. 0.5 ps / sqrt (km) hauv G.652.C.
Dab tsi Qhov Sib txawv ntawm G.652 thiab G.655?
Tsis zoo li xoom-dispersion-hloov mus ua fiber ntau (G.652) uas muaj xoom-dispersion wavelength ntawm 1310 nm, G.655 fiber yog lub npe hu ua non-zero dispersion-hloov fiber (NZDSF) txij li cov dispersion ntawm 1550 nm ze rau xoom , tab sis tsis xoom. NZDSF kov yeej cov teeb meem tsis sib haum hauv WDM systems, xws li plaub-nthwv sib xyaw sib xyaw (FWD), los ntawm kev txav mus rau xoom-kev tawg nthwv dej wavelength sab nraum 1550nm qhov rais ua haujlwm. G.655 fiber yog teev ntawm 1550 nm thiab 1625 nm. Nws muaj qhov me me, tswj tau tus nqi ntawm chromatic dispersion nyob rau hauv C-band (1530-1560 nm), qhov twg amplifiers ua haujlwm tau zoo tshaj, thiab muaj thaj chaw loj dua G.652 fiber. Muaj ob hom NZDSF, hu ua (-D) NZDSF thiab (+ D) NZDSF. Lawv muaj feem cuam tshuam txog qhov tsis zoo thiab txoj kab nqes ntawm ntu nthwv dej. Attenuation parameter rau G.655 fiber ntau li ntawm 0.2 dB / km ntawm 1550 nm, thiab PMD qhov ntsuas tsis dua 0.1 ps / sqrt (km). Ob qhov nqi qis dua tus nqi ntawm G.652 fiber.
Daim duab 2: Qhov sib txawv ntawm G.652 thiab G.655.
Qhov Sib Txawv Ntawm G.652 thiab G.657 Dab Tsi?
G.657 fiber yog tsim los kom haum nrog G.652 fiber tab sis muaj tsawg dua khoov-rhiab, uas txhais tau tias nws ua rau qis dua qhov ua tau zoo vim yog khoov. G.657 fiber ntau tau faib ua ob ntu: qeb A rau kev nkag rau tes hauj lwm thiab qeb B rau qhov kawg ntawm kev nkag rau tes hauj lwm hauv ib puag ncig khoov-nplua nuj. Txhua pawg (A thiab B) tau muab faib ua ob pawg me: G.657.A1 thiab G.657.A2, G.657.B2 thiab G.657.B3. Peb tuaj yeem pom cov khoov hluav taws xob ntau ntawm G.652 fiber ntau thiab txawv G.657 fibers.
Daim duab 3: Khoov khoov qhov sib txawv ntawm G.652 thiab G.657.
Hom Twg Ib Hom Fiber Ntau Kuv Yuav Tsum Tau Xaiv?
ITU-T G.65x fiber ntau tau teev tseg ua rau cov ntawv thov sib txawv. Cov G.652, G.655 thiab G.657 cov fibers uas peb tau hais los saum toj no yog siv rau hauv lawv thaj chaw, thiab cov G.653, G.654 thiab G.656 fibers muaj qhov tshwj xeeb hauv lwm cheeb tsam. G.653 fiber ntau teev ntawm 1310 nm thiab 1550 nm tab sis nrog qhov xoom chromatic dispersion nqes hav hauv thaj tsam 1550nm. G.654 fiber ntau yog qhov ua kom tsawg-txo thiab txiav tawm mus thaum lub yoj yoj ntawm ib puag ncig 1500 nm. G.656 fiber yog teev ntawm 1460 nm thiab 1625 nm tab sis nrog qhov tsis yog xoom chromatic dispersion nqes nyob rau hauv cov cheeb tsam wavelength. Ntawm no yog ib qho kev sib piv ntawm lawv:
| Npe | Lwm Lub Npe | Qhia meej Wavelength (nm) | Cov ntawv thov |
|---|---|---|---|
| G.652 | Xoom-tawg / tsis-dispersion-hloov fiber ntau, lossis qauv SMF. | 1310, 1550, 1625 (C thiab D tsis suav) | LAN, txiv neej, nkag rau tes hauj lwm thiab CWDM kis. |
| G.653 | Kev tawg yooj yim-hloov kev kho qhov muag | 1310 txog 1550 | Ntev-log ib hom kev xa cov hluav taws xob kis siv erbium-doped fiber ntau lub tshuab hluav taws xob (EDFA). |
| G.654 | Cov hlais tawm hloov kho qhov muag hluav taws xob | 1550 | Kev ua haujlwm siab bandwidth ntau dua thiab rov qab zoo dua. |
| G.655 | Tsis yog-xoom dispersion-hloov kho dua fiber ntau (NZDSF) | 1550 txog 1625 | Kev tsav ntev ntev uas siv sib kis tau Dense WDM (DWDM). |
| G.656 | Tsis xoom dispersion rau Wideband Optical Thauj fiber ntau | 1460 txog 1625 | Kev siv lub tshuab ntev uas siv CWDM thiab DWDM xa mus dhau lub nthwv dej ntawm cov kab |
| G.657 | Dabtsi yog khoov ploj insensitive optical fiber rau kev nkag tau tes hauj lwm | 1260 txog 1625 | Cov cuab yeej siv fiber-rau-hauv-tsev (FTTH). |
Xaus
Txawv tib hom kho qhov muag cov ntsiab lus tau txiav txim los ntawm ITU-T suav nrog G.652, G.653, G.654, G.655, G.656 thiab G.657. Txhua hom fiber ntau hom tau nws thaj chaw ntawm kev thov thiab kev hloov zuj zus ntawm cov hluav taws xob fiber ntau cov ntsiab lus nthuav qhia kev hloov pauv ntawm cov tshuab xa hluav taws xob los ntawm qhov kev teeb tsa thaum ntxov ntawm ib hom fiber ntau kho qhov muag los txog rau niaj hnub no. Xaiv qhov yog rau koj txoj haujlwm tuaj yeem yog qhov tseem ceeb ntawm kev ua tiav, nqi, kev ntseeg siab thiab kev nyab xeeb
