Optical fiber yog lub hauv paus ntawm kev sib txuas lus niaj hnub no, tab sis nws tsis yog ib yam khoom. Ob lub ntsiab ntawm optical fiber ntau yogtib - hom fiber ntau(SMF) thiabmultimode fiber ntau(MMF). Nkag siab qhov sib txawv ntawm ob hom fiber ntau optic cable - thiab paub thaum twg yuav siv txhua tus - yog qhov tseem ceeb rau leej twg npaj lub network xa tawm, hloov kho cov txheej txheem uas twb muaj lawm, lossis qhia txog fiber ntau rau cov ntaub ntawv chaw, tsev kawm ntawv, lossis qhov project telecom.
Phau ntawv qhia no piav qhia txog kev faib cov fiber ntau optical li cas, rhuav tshem cov subtypes tseem ceeb thiab cov qauv hauv txhua pawg, thiab muab cov lus qhia siv tau rau kev xaiv cov fiber ntau rau koj lub network.
Yuav ua li cas kho qhov muag fiber ntau
Ib qho laj thawj fiber ntau tuaj yeem zoo li tsis meej pem yog tias muaj ntau txoj hauv kev los faib cov fiber ntau optical. Cov txheej txheem feem ntau yog:
- Los ntawm lub teeb propagation (hom):ib leeg-mode fiber ntau vs multimode fiber ntau - qhov pib ua tau zoo tshaj plaws rau cov neeg yuav khoom feem ntau.
- Los ntawm refractive index profile:kauj ruam-index fiber ntau vs graded-index fiber - piav qhia txog yuav ua li cas cov tub ntxhais lub refractive index yog structured.
- Los ntawm cov khoom siv:iav fiber vsyas optical fiber ntau- txhais tau tias cov fiber ntau yog ua los ntawm.
- Raws li cov qauv:OM chav kawm (OM1–OM5) rau ntau hom; G.652, G.657, thiab lwm yamITU-T G.65x cov lus qhiarau ib leeg - hom.
Rau cov engineers, network planners, thiab procurement teams, qhov tseem ceeb tshaj plaws mus kom ze yog pib nrog ib tug -hom vs multimode kev txiav txim, ces nqaim los ntawm tus qauv thiab xa mus scenario. Lwm txoj kev faib tawm - refractive index profile, cov khoom siv - muab cov keeb kwm yav dhau muaj txiaj ntsig tab sis tsis tshua muaj kev txiav txim siab yuav khoom hauv cov haujlwm tseem ceeb hauv network.
Tib -Mode vs Multimode Fiber: Qhov Tseem Ceeb Qhov txawv
Tib - hom fiber ntaumuaj cov tub ntxhais me me (feem ntau nyob ib ncig ntawm 8-10 µm) uas tso cai tsuas yog ib hom ntawm lub teeb kom nthuav tawm. Qhov no tshem tawm modal dispersion thiab tso cai rau cov teeb liab taug kev mus deb nrog tsawg kawg degradation - ua rau nws tus qauv xaiv rau telecom backbones, metro networks, nkag mus rau network, thiab ntev -haul links.
Multimode fiber ntaumuaj cov tub ntxhais loj dua (50 µm lossis 62.5 µm) uas txhawb nqa ntau hom teeb ci ib txhij. Nws yog dav siv rau luv luv - mus txog kev sib txuas hauv cov tuam tsev lag luam, cov pob txha hauv tsev kawm ntawv, thiabcov chaw zov me nyuam, qhov twg qhov kev ncua deb yog feem ntau nyob rau hauv ob peb puas meters.
Ib qho kev xav tsis zoo yog tias tus nqi cable ib leeg txiav txim siab uas fiber ntau pheej yig dua. Hauv kev xyaum, tag nrho cov nqi hluav taws xob yog nyob ntawm cov transceivers, connectors, thiab kev teeb tsa ua haujlwm. Rau luv luv- mus txog qhov chaw lag luam thiab cov ntaub ntawv chaw ib puag ncig, multimode fiber ntau feem ntau xa cov nqi qis dua vim tias tau sib xws VCSEL-raws li transceivers thiab connectors tsis tshua kim tshaj ib qho - hom optics. Raws li qhov txuas txuas ntxiv, txawm li cas los xij, ib qho - hom yuav tsim nyog tsis hais tus nqi vim tias multimode fiber ntau tsis tuaj yeem tswj cov teeb liab zoo tshaj qhov txuas mus ntxiv.
| Feature | Tib -Mode Fiber (SMF) | Multimode Fiber (MMF) |
|---|---|---|
| Core txoj kab uas hla | ~8–10 µm | 50 µm 62.5 µm |
| Lub teeb nthuav dav | Ib hom | Ntau hom |
| Lub zog loj | Ntev ncav cuag, siab teeb liab clarity | Tus nqi- siv sijhawm luv luv- ncav cuag kev sib tham |
| Ib puag ncig ib puag ncig | Telecom, metro, nkag mus, nraub qaum, ntev -haul | Cov tsev lag luam, tsev kawm ntawv, cov chaw khaws ntaub ntawv |
| Cov qauv zoo sib xws | G.652, G.657 | OM1, OM2, OM3, OM4, OM5 |
| Tus nqi transceiver | Siab dua (laser-raws li) | qis (VCSEL{0}}raws li 850 nm) |
| Hom ncav cuag | Kilometer mus rau pua pua kilometers | Txog li ~ 550 m nyob ntawm cov ntaub ntawv tus nqi thiab OM qib |
Multimode Fiber Hom: OM1, OM2, OM3, OM4, thiab OM5
Multimode fiber ntau tau muab faib ua cov qib uas txhais los ntawm covTIAthiab ISO / IEC cov qauv. Cov qib no - OM1 txog OM5 - txawv feem ntau nyob rau hauv modal bandwidth, uas txiav txim siab deb npaum li cas lawv tuaj yeem xa cov ntaub ntawv ntawm qhov ceev.
OM1 thiab OM2: Legacy Multimode Fiber
OM1 fiber ntau siv 62.5 µm core thiab yog tsim los rau LED-raws li lub teeb ci. OM2 siv 50 µm core thiab tseem tau pib tsim los rau kev sib kis ntawm LED. Ob qib muaj kev txwv bandwidth los ntawm cov qauv niaj hnub no thiab raug cais raws li cov khoom qub qub. TIA pom zoo tiasKev teeb tsa tshiab siv OM3, OM4, lossis OM5tsis yog OM1 lossis OM2.
Yog tias koj ntsib OM1 lossis OM2 hauv ib lub tsev uas twb muaj lawm, nws tseem tuaj yeem nqa 1 Gigabit Ethernet tsheb hla kev deb. Tab sis rau ib txoj haujlwm tshiab cabling, qhia txog OM1 lossis OM2 txwv kev hloov kho tshiab rau yav tom ntej thiab feem ntau yuav tsum zam.
OM3: Laser-Optimized Multimode rau 10G thiab Tshaj
OM3 yog thawj qib multimode fiber ntau tsim tshwj xeeb rau VCSEL laser qhov chaw ntawm 850 nm. Nws muaj qhov ua tau zoo modal bandwidth (EMB) ntawm 2000 MHz · km ntawm 850 nm, uas txhawb nqa 10 Gigabit Ethernet mus txog 300 meters. OM3 tseem yog ib qho kev xaiv siv tau rau kev lag luam tes hauj lwm uas 10G kev sib txuas ua ke tswj hwm thiab nyob deb li cas.
OM4: Siab dua Bandwidth rau Data Center thiab Campus Links
OM4 muaj EMB ntawm 4700 MHz ·km ntawm 850 nm - ntau dua ob npaug ntawm OM3. Qhov no tso cai rau nws los txhawb 10 Gigabit Ethernet mus txog 400 meters thiab 100 Gigabit Ethernet (100GBASE-SR4) mus txog 100 meters. Rau ntau qhov chaw ua haujlwm tshiab tshiab thiab kev xa tawm hauv tsev kawm ntawv tshiab, OM4 hits qhov kev sib npaug ntawm kev ua tau zoo, ncav cuag, thiab tus nqi.
OM5: Wideband Multimode rau Multi-Wavelength Transmission
OM5, tseem hu ua wideband multimode fiber (WBMMF), yog teev ntawm ob qho tib si 850 nm thiab 953 nm. Nws yog tsim los txhawb luv luv -wavelength division multiplexing (SWDM), uas xa ntau lub wavelengths (feem ntau 850, 880, 910, thiab 940 nm) dhau ib khub fiber ntau. Qhov no ua rau OM5 cuam tshuam thaum koj daim ntawv qhia kev suav nrog SWDM{11}}raws li transceivers rau 40G, 100G, lossis 400G kis.
Txawm li cas los xij, OM5 tsis tas yuav tsum tau ua rau txhua qhov niaj hnub multimode network. Yog tias koj qhov kev xa tawm siv tus qauv 850 nm transceivers yam tsis muaj SWDM, OM4 muab qhov ua tau zoo tib yam ntawm tus nqi qis dua. Ntsuam xyuas OM5 thaum ntau - cov tswv yim wavelength yog ib feem ntawm koj qhov kev npaj kho dua tshiab - tsis yog lub neej ntawd.
OM3 vs OM4 vs OM5: Phau ntawv txiav txim ceev
| Scenario | Pom zoo Qib |
|---|---|
| Tuav lossis txuas ntxiv OM3 infrastructure ntawm 10G | OM 3 |
| Cov ntaub ntawv tshiab lossis tsev kawm ntawv tsim txhawb 10G-100G | OM 4 |
| Kev tsim kho tshiab nrog SWDM transceiver roadmap rau 40G-400G | OM 5 |
| Kev kho qub qub lossis luv luv - ncua sij hawm | Ua raws qib OM uas twb muaj lawm |
Tib - Hom Fiber Hom: G.652 vs G.657
Tib - qauv fiber ntau yog txhais los ntawmITU-T(International Telecommunication Union – Telecommunication Standardization Sector). Thaum muaj ob peb G.65x cov lus pom zoo, ob qhov tseem ceeb tshaj plaws rau feem ntau ntawm kev txiav txim siab xa mus: G.652 thiab G.657.
G.652: Tus Qauv Ib Leeg -Hom Fiber
ITU-T G.652 yog qhov dav tshaj plaws ntsia ib zaug - hom fiber ntau hauv ntiaj teb. Thawj tus qauv hauv xyoo 1984, nws qhia txog cov fiber ntau nrog xoom-dispersion wavelength ze 1310 nm, ua kom zoo rau kev ua haujlwm hauv 1310 nm band thiab tseem siv tau hauv 1550 nm band. Cov subcategory tam sim no tshaj plaws, G.652.D, tshem tawm cov dej ncov rau tag nrho -spectrum kev ua haujlwm thiab muaj kev ua haujlwm nruj dua polarization hom dispersion (PMD) - ua rau nws haum rau CWDM thiab DWDM systems.
G.652 tseem yog qhov kev xaiv ua ntej rau - lub hom phiajtib - hom fiber ntaunyob rau hauv qaum, metro, thiab thauj cov tes hauj lwm uas khoov -Riv txwv li qhov yuav tsum tau muaj (tsawg kawg khoov vojvoog ntawm 30 mm).
G.657: Khoov-Insensitive Single-Mode Fiber
ITU-T G.657 tau tsim los daws cov kev sib tw khoov uas tshwm sim hauv kev nkag mus rau hauv tes hauj lwm, cabling sab hauv tsev, thiab qhov chaw- txwv ib puag ncig xws li cov chaw zov me nyuam. G.657 fibers zam nruj dua khoov radii nrog cov teeb liab poob qis dua piv rau G.652.
Muaj ob pawg tseem ceeb hauv G.657:
- Qeb A (G.657.A1, G.657.A2):Ua raws li G.652.D, txhais tau tias lawv tuaj yeem xa mus rau qhov twg G.652.D tau teev tseg thaum tseem muab kev kho kho khoov kev ua tau zoo. G.657.A1 txhawb qhov tsawg kawg nkaus khoov vojvoog ntawm 10 hli; G.657.A2 txhawb 7.5 hli.
- Qeb B (G.657.B2, G.657.B3):Optimized rau nruj heev khoov nyob rau hauv luv luv - ncav cuag thiab sab hauv ib puag ncig, nrog B3 txhawb ib tug yam tsawg kawg nkaus khoov vojvoog ntawm 5 mm. Qeb B fibers yuav tsis ua raws li G.652.D chromatic dispersion specifications, tab sis lawv yog qhov system- siv tau rau kev siv network.
Hauv kev nkag mus rau qhov chaw fiber ntau yuav tsum taug kev los ntawm cov ris tsho nruj, cov ntaub thaiv me me, lossis nyob ib puag ncig ntawm cov ces kaum ntse, G.657 fibers txo qhov kev pheej hmoo ntawm kev khoov ntau dhau. Hauv cov ntaub ntawv chaw ib puag ncig nrog siab - ntompatch kabrouting, G.657.A-ua raws fiber ntau muab lub ntsiab lus zoo dua tus qauv G.652.
G.652 vs G.657: Thaum Xaiv Txhua
| Scenario | Pom zoo Standard |
|---|---|
| Ntev -haul nraub qaum lossis metro thauj nrog cov txheej txheem routing | G.652.D |
| FTTH nkag network nrog sab hauv tsev / riser routing | G.657.A1 or G.657.A2 |
| Dense data center patching nrog ceev cable tswj | G.657.A1 or G.657.A2 |
| Cov chaw nyob sab hauv tsev tsis tshua muaj (piv txwv li, MDU risers, kaw ntom nti) | G.657.B3 |
Kauj ruam-Index vs Qib{1}}Index Fiber
Lwm txoj hauv kev los faib cov fiber ntau optical yog los ntawm nws qhov profile refractive index profile. Hauv ibkauj ruam -indexfiber ntau, lub refractive index yog sib xws nyob rau hauv lub tub ntxhais thiab tee sharply ntawm cov tub ntxhais -cladding ciam teb. Hauv ibqib -indexfiber ntau, qhov refractive index txo qis los ntawm qhov nruab nrab ntawm cov tub ntxhais mus rau cladding.
Qhov kev sib txawv no tseem ceeb vim hais tias refractive index profile ncaj qha cuam tshuam rau modal dispersion. Hauv kauj ruam -index multimode fiber ntau, ntau hom kev sib txawv ntawm lub teeb mus txawv tebchaws ntawm qhov sib txawv ntawm qhov sib txawv los ntawm cov tub ntxhais sib xws, ua rau cov teeb liab tuaj txog ntawm lub sijhawm sib txawv thiab txwv bandwidth. Nyob rau hauv qib -index multimode fiber ntau, qhov sib txawv refractive Performance index ua rau lub teeb rays deb ntawm lub hauv paus chaw mus sai, ib feem them rau lawv txoj kev ntev. Qhov kev sib txig sib luag no ua rau txo qis kev sib txawv ntawm qhov sib txawv thiab ua kom muaj bandwidth siab dua nyob rau qhov ntev.
Txhua yam niaj hnub multimode fiber ntau siv hauv cov ntaub ntawv sib txuas lus - OM2, OM3, OM4, thiab OM5 - yog qib -index. Kauj ruam-index multimode fiber ntau yog feem ntau cuam tshuam nrog cov qauv qub thiab cov ntawv tshwj xeeb xws li yas kho qhov muag fiber ntau (POF). Tib hom - hom fiber ntau, los ntawm qhov sib piv, siv cov kauj ruam -index profile los ntawm lub neej ntawd, tab sis vim tias tsuas yog ib hom propagates, modal dispersion tsis siv.
iav Fiber vs Yas Optical Fiber
Cov fiber ntau optical siv hauv kev sib txuas lus thiab cov ntaub ntawv sib txuas yog tsim los ntawm silica iav. Cov iav fiber ntau muaj qhov qis qis, siab bandwidth, thiab haum rau kev xa mus ntev -. Tag nrho cov qauv OM thiab G.65x tau tham saum toj no siv rau iav fiber ntau.
Yas optical fiber ntau(POF) siv cov tub ntxhais polymer, feem ntau nrog cov kauj ruam loj -index tsim. Nws yooj yim dua los txiav thiab hloov pauv ntau dua li iav fiber ntau, tab sis nws muaj ntau dua attenuation thiab qis bandwidth. POF yog siv luv luv - txuas daim ntawv thov xws li tsheb sib txuas, kev sib txuas hauv tsev audio / video, thiab kev paub txog kev lag luam - tsis nyob rau hauv cov khoom siv hluav taws xob siab - muaj peev xwm sib txuas lus.
Yuav Ua Li Cas Xaiv Txoj Cai Fiber rau Koj Lub Network
Tsis yog kho cov kev xaiv fiber ntau raws li phau ntawv qhia kev tawm dag zog, ua kom nws ua qhov kev txiav txim siab zoo raws li koj qhov kev xa tawm tshwj xeeb. Nov yog cov ntsiab lus tseem ceeb, siv rau cov xwm txheej sib xws:
1. Txiav txim siab txog koj qhov kev ncua deb
Yog tias koj cov kev sib txuas ntau tshaj li ob peb puas meters, ib qho - hom fiber ntau yog qhov kev xaiv siv tau xwb. Rau kev sib txuas hauv qab 300–400 meters - feem ntau hauv cov tsev, nruab nrab ntawm cov tsev hauv tsev kawm ntawv, lossis hauv ib qhodata center- multimode fiber ntau tuaj yeem xa cov kev ua haujlwm xav tau ntawm tus nqi qis dua.
2. Ntsuas Tag Nrho Cov Nqi Them Nqi, Tsis yog Tus Nqi Cable xwb
Multimode fiber ntau cable tuaj yeem raug nqi me ntsis rau ib lub 'meter' dua ib qho -hom hauv qee lub khw, tab sis multimodetransceiversthiab connectors feem ntau tsis tshua kim. Rau luv luv - mus txog qhov sib txuas hauv cov chaw zov me nyuam cov ntaub ntawv thiab chaw lag luam ib puag ncig, kev txuag hluav taws xob feem ntau tshaj qhov sib txawv ntawm cov nqi cable. Raws li cov kev xav tau loj hlob tuaj, kev lag luam hloov mus rau ib qho - hom.
3. Ntsuam xyuas lub cev kev teeb tsa ib puag ncig
Hauv kev nkag mus rau hauv tes hauj lwm, kev teeb tsa riser, thiab siab -kev tswj cov kab hluav taws xob ceev, kev khoov nruj yog yam tsis muaj. Yog tias koj tab tom siv ib qho - hom fiber ntau hauv cov xwm txheej no, qhia meejG.657 khoov-sensitive fibertxo qhov kev pheej hmoo ntawm ntau dhau attenuation ntawm khoov. Rau sab hauv thiabkab hauv tsevkev siv qhov twg routing raug txwv, qhov no yog qhov tseem ceeb tshwj xeeb.
4. Npaj rau Kev Ceev thiab Txhim Kho Txoj Kev
Yog tias koj tab tom tsim cov txheej txheem multimode tshiab, zam kev qhia OM1 lossis OM2. Rau 10G-100G cov cai, OM4 yog qhov kev xaiv ntau tshaj plaws. Yog tias koj lub koom haum cov phiaj xwm muaj xws li SWDM-raws li transceivers, ntsuas OM5. Rau ib hom -hom, G.657.A-raws li fiber ntau muaj rov qab sib raug zoo nrog G.652.D thaum muab kev khoov zoo dua qub - ua rau nws muaj txiaj ntsig zoo rau ib qho tshiab - hom kev teeb tsa.
5. Xav txog kev tsim kho Cable thiab ib puag ncig
Hom optical fiber nyob rau hauv ib lub cable yog cais los ntawm lub cable kev tsim kho. Tib tib - hom lossis multimode fiber ntau tuaj yeem ntim rau hauvunderground kab, aerial kab, nruj- tsis nyob hauv tsev cables, los yogxoob-tube sab nraum zoov cablesnyob ntawm qhov chaw nws yuav raug ntsia. Nco ntsoov tias koj qhia ob hom fiber ntau thiab kev tsim kho cable tsim nyog rau koj ib puag ncig.
Feem ntau yuam kev thaum xaiv Optical Fiber
Ob peb qhov yuam kev rov ua rau muaj kev xaiv fiber ntau:
- Qhia meej OM1 lossis OM2 rau kev teeb tsa tshiab.Cov qib qub txeeg qub teg no txwv kev siv bandwidth thiab muaj peev xwm txhim kho yav tom ntej. TIA pom zoo OM3, OM4, lossis OM5 rau txhua qhov kev xa tawm multimode tshiab.
- Muab piv cov nqi cable nkaus xwb.Tsis quav ntsej transceiver, connector, thiab installation nqi muab ib daim duab tsis tiav. Tag nrho cov nqi txuas - tsis yog cable nqi ib leeg - yuav tsum tsav qhov kev txiav txim.
- Tsis meej pem hom fiber ntau nrog kev tsim kho cable.Fiber optic cable lub tsho, armor, thiabkev tsim qauvraug xaiv raws li kev teeb tsa ib puag ncig. Cov fiber ntau sab hauv yog xaiv raws li kev xav tau ntawm kev sib kis. Cov no yog ob qho kev txiav txim siab.
- Defaulting rau OM5 yam tsis muaj SWDM txoj kev qhia.OM5 ntxiv tus nqi thaum ntau - wavelength kis tau tus mob tau npaj. Yog tsis muaj SWDM transceivers, OM4 muaj tib yam - wavelength kev ua tau zoo ntawm tus nqi qis.
- Siv tus qauv G.652 hauv nruj- khoov ib puag ncig.Qhov twg routing dhau los ntawm cov ntaub thaiv me me los yog cov fab nruj, G.657 khoov-insensitive fiber tiv thaiv qhov tsis tsim nyog teeb liab.
Cov ntawv thov los ntawm Fiber Hom
| Hom Fiber | Cov ntawv thov siv | Hom Distance Range |
|---|---|---|
| Tib - hom (G.652.D) | Telecom nraub qaum, metro rings, ntev - thauj thauj | Kilometer mus rau pua pua km |
| Tib - hom (G.657.A) | FTTH poob cables, sab hauv tsev, cov ntaub ntawv chaw patching | Meters mus kilometers |
| Multimode OM3 | Enterprise LAN, lub tsev kawm ntawv qaum tsev ntawm 10G | Mus txog 300 m (10GbE) |
| Multimode OM4 | Data center interconnects, 10G-100G tsev kawm ntawv / DC txuas | Mus txog 400 m (10GbE), 100 m (100GbE) |
| Multimode OM5 | SWDM-raws li 40G–400G data center links | Mus txog 440 m (40G SWDM), 150 m (100G SWDM) |
FAQ
Q: Dab tsi yog Ob Qhov Tseem Ceeb Ntawm Optical Fiber?
A: Ob hom tseem ceeb yog tib - hom fiber ntau thiab ntau hom fiber ntau. Tib hom - hom muaj lub hauv paus me me uas nqa ib hom teeb rau ntev - kis tau tus mob. Multimode muaj cov tub ntxhais loj dua uas txhawb nqa ntau hom thiab siv rau luv dua - mus txog kev sib tham.
Q: Qhov txawv ntawm Tib -Mod Thiab Multimode Fiber yog dab tsi?
A: Ib leeg- hom fiber ntau siv cov tub ntxhais ntawm li 8-10 µm thiab xa ib hom teeb pom kev zoo, tso cai rau cov teeb liab mus rau qhov deb nrog tsawg tsawg. Multimode fiber ntau siv 50 µm lossis 62.5 µm core thiab xa ntau hom ib txhij, uas txwv nws cov txiaj ntsig zoo tab sis txo tus nqi transceiver rau luv luv txuas. Rau kev sib piv sib sib zog nqus, saib peb phau ntawv qhia ntawm ib zaug -hom vs multimode fiber ntau.
Q: Puas yog Multimode Fiber Ib txwm pheej yig dua ib zaug -Hom?
A: Tsis yog nyob rau ntawm ib qho -meter cable hauv paus - hauv qee kis multimode cable raug nqi me ntsis ntxiv. Tab sis luv luv - mus txog cov ntawv thov, cov tshuab multimode feem ntau muaj tus nqi qis dua vim tias VCSEL transceivers thiab cov khoom txuas uas lawv siv tsis tshua kim dua ib qho - hom optics. Raws li qhov kev ncua deb nce, ib qho - hom yuav tsim nyog thiab nws cov nqi kho qhov muag yuav tsum raug lees txais.
Q: Puas yog OM5 yuav tsum tau ua rau txhua qhov kev teeb tsa Multimode tshiab?
A: Tsis yog. OM5 muab qhov txiaj ntsig tshwj xeeb thaum siv SWDM multi- wavelength transceivers. Rau tus qauv ib zaug -wavelength 850 nm xa mus, OM4 muab tib yam kev ua haujlwm. Xaiv OM5 tsuas yog thaum SWDM yog ib feem ntawm koj daim ntawv qhia tiag tiag.
Q: Thaum twg Kuv Yuav Tsum Siv G.657 Hloov G.652?
A: Use G.657 whenever the fiber route involves tight bends - common in FTTH access drops, indoor riser installations, dense data center patching, and MDU (multi-dwelling unit) deployments. G.657 Qeb A fibers yog tag nrho rov qab sib xws nrog G.652.D, yog li lawv tuaj yeem hloov G.652.D hauv txhua daim ntawv thov thaum ntxiv khoov zoo dua.
Q: Qhov txawv ntawm Kauj Ruam -Index Thiab Graded-Index Fiber yog dab tsi?
A: Kauj Ruam-index fiber ntau muaj qhov ntsuas qhov ntsuas tsis sib xws thoob plaws hauv cov tub ntxhais, thaum qib qib -index fiber muaj qhov ntsuas qhov ntsuas qhov ntsuas qis qis qis ntawm qhov nruab nrab sab nraud. Qib-index tsim txo qis modal dispersion, uas yog vim li cas txhua yam niaj hnub multimode kev sib txuas lus fiber ntau siv cov qib-index profile.
Q: Kuv yuav kuaj thiab txheeb xyuas qhov Fiber Kuv tau txais li cas?
A: Fiber ntau yuav tsum tau kuaj tom qab kev teeb tsa siv OTDR (optical time-domain reflectometer) thiab kho qhov muag poob kuaj teeb. Xyuas kom tseeb tias ntsuas qhov attenuation thiab connector / splice poob raws li cov specifications rau cov xaiv fiber ntau thiab txuas pob nyiaj siv. Yog xav paub ntxiv txog cov txheej txheem kuaj, saib peb cov lus qhia ntawm fiber ntau optic cable kuaj.