Peb cov nqi yuav zoo heev thiab kev sib tw vim peb muaj peev xwm ua tau zoo, txawm tias tus nqi yuav raug hloov raws li cov khoom siv thiab lwm yam lag luam. Peb yuav xa koj daim ntawv teev nqi tshiab tom qab koj lub tuam txhab tiv tauj peb kom paub ntxiv.
Qhov tseeb tsis yog. peb yuav hais raws li koj qhov ntau. Qhov ntau koj xaj, tus nqi zoo dua koj yuav tau txais. Thiab yog tias koj xav tau cov qauv dawb, thov hu rau peb ntawm email.
Tau kawg, yog. Peb tuaj yeem muab cov ntaub ntawv cuam tshuam rau koj, xws li Daim Ntawv Pov Thawj Kev Ntsuam Xyuas / Kev Ua Raws Cai; Kev pov hwm; Keeb kwm, thiab lwm yam ntaub ntawv export.
Raws li koj qhov ntau thiab cov qauv hauv kev nthuav dav, peb yuav muab sijhawm rau koj tsim nyog. Raws li ib txwm muaj, rau cov qauv, lub sijhawm ua haujlwm yog li 7 hnub. Rau kev tsim khoom loj, lub sijhawm ua haujlwm yog 20-30 hnub tom qab tau txais cov nyiaj them poob haujlwm. Dawb pub dawb qhia rau peb paub yog tias koj muaj qhov tshwj xeeb xav tau.
Koj tuaj yeem them nyiaj rau peb tus account hauv txhab nyiaj, Western Union lossis PayPal:
30% tso nyiaj ua ntej, 70% tshuav nyiaj li cas tiv thaiv daim B / L.
Peb lav peb cov ntaub ntawv thiab kev ua haujlwm. Peb qhov kev cog lus yog kom koj txaus siab rau peb cov khoom. Hauv kev lees paub lossis tsis yog, nws yog kab lis kev cai ntawm peb lub tuam txhab los daws thiab daws txhua yam teeb meem ntawm cov neeg siv khoom kom txhua tus neeg txaus siab
Yog lawm, peb ib txwm siv cov khoom ntim zoo export. Peb kuj tseem siv cov ntim khoom tshwj xeeb rau cov khoom txaus ntshai thiab siv tau cov neeg xa khoom txias cia rau cov khoom kub. Cov khoom ntim tshwj xeeb thiab cov khoom ntim tsis yog tus qauv yuav raug them nqi ntxiv.
Tus nqi shipping nyob ntawm txoj kev koj xaiv kom tau cov khoom. Kev nthuav qhia feem ntau yog qhov nrawm tshaj plaws tab sis kuj tseem kim tshaj. Los ntawm seafreight yog qhov kev daws teeb meem zoo tshaj plaws rau cov nyiaj loj. Raws nraim cov nqi thauj khoom peb tuaj yeem muab rau koj yog tias peb paub cov ntsiab lus ntawm tus nqi, qhov hnyav thiab txoj kev. Thov hu rau peb kom paub ntxiv.
Qhov tseeb, qhov sib txawv ntawm OM3 thiab OM4 fiber ntau tsuas yog nyob rau hauv kev tsim kho ntawm fiber ntau optical cable. Qhov sib txawv ntawm kev tsim kho txhais tau hais tias OM4 cable tau zoo dua attenuation thiab tuaj yeem ua haujlwm ntawm bandwidth siab dua OM3. Qhov no yog vim li cas? Rau qhov txuas fiber ntau ua haujlwm, lub teeb los ntawm VCSEL transceiver ntau muaj lub zog txaus kom ncav cuag tus txais ntawm lwm qhov kawg. Muaj ob qhov kev ua tau zoo uas tuaj yeem tiv thaiv qhov no - kho qhov muag attenuation thiab modal dispersion.
Attenuation yog qhov txo qis hauv lub zog ntawm lub teeb liab thaum nws kis tau (dB). Attenuation yog tshwm sim los ntawm kev poob nyob rau hauv lub teeb los ntawm passive Cheebtsam, xws li cables, cable splices, thiab connectors. Raws li tau hais los saum toj no cov connectors zoo ib yam yog li qhov kev ua tau zoo sib txawv hauv OM3 vs OM4 yog qhov poob (dB) hauv cable. OM4 fiber ntau ua rau poob qis vim nws kev tsim kho. Qhov siab tshaj plaws attenuation tso cai los ntawm cov qauv qhia hauv qab no. Koj tuaj yeem pom tias siv OM4 yuav ua rau koj poob qis dua ib meter ntawm cable. Qhov kev poob qis dua txhais tau tias koj tuaj yeem muaj kev sib txuas ntev dua lossis muaj cov sib txuas sib txuas ntau dua hauv qhov txuas.
Qhov siab tshaj plaws attenuation tso cai ntawm 850nm: OM3<3.5 dB/Km; OM 4<3.0 dB/Km
Lub teeb kis tau ntawm ntau hom raws li fiber ntau. Vim qhov tsis zoo ntawm fiber ntau, cov qauv no tuaj txog raws li lub sijhawm sib txawv me ntsis. Raws li qhov sib txawv no nce koj thaum kawg tau mus rau qhov chaw uas cov ntaub ntawv raug xa mus tsis tuaj yeem txiav txim siab. Qhov sib txawv ntawm qhov siab tshaj plaws thiab qis tshaj plaws yog hu ua modal dispersion. Lub modal dispersion txiav txim siab modal bandwidth uas cov fiber ntau tuaj yeem ua haujlwm ntawm thiab qhov no yog qhov txawv ntawm OM3 thiab OM4. Qhov qis ntawm modal dispersion, qhov siab dua qhov modal bandwidth thiab ntau dua cov ntaub ntawv uas tuaj yeem xa mus. Lub modal bandwidth ntawm OM3 thiab OM4 yog qhia hauv qab no. Qhov siab dua bandwidth muaj nyob rau hauv OM4 txhais tau hais tias ib qho me me modal dispersion thiab yog li tso cai rau cov cable txuas mus ntev dua los yog tso cai rau kev poob siab dua los ntawm kev sib txuas ntau dua. Qhov no muab ntau txoj kev xaiv thaum saib kev tsim network.
Yam tsawg kawg nkaus Fiber Cable Bandwidth ntawm 850nm: OM3 2000 MHz ·km; OM4 4700 MHz · km
Koj tuaj yeem qhia rau peb paub txog cov xwm txheej ib puag ncig uas cov khoom yuav raug siv, nrog rau kev nyiam rau cov ncauj lus kom ntxaws xws li av noo, kub, thiab geological yam. Peb tuaj yeem muab cov khoom sib xyaw ua ke / fiber ntau sib xyaw thiab tus nqi kom tau raws li koj cov kev xav tau tshwj xeeb. Customized khoom xaiv kuj muaj.
Fiber cable muaj xws li:
Core **: Ultra-ntshiab iav / silica (8-62.5µm txoj kab uas hla) rau lub teeb kis tau tus mob.
Cladding **: txheej txheej nrog qis refractive index kom muaj lub teeb.
Txheej **: txheej tiv thaiv acrylate (250µm).
Cov tswv cuab muaj zog **: Aramid yarn / fiberglass rods.
Lub tsho sab nrauv **: PE / PVC / LSZH cov ntaub ntawv rau kev tiv thaiv ib puag ncig.
| **Parameter** | **Single-Mode (SMF)** | **Multi-Mode (MMF)** |
|------------------------------------------------------------------------------------------------|
| Tub ntxhais txoj kab uas hla | 8-10µm | 50/62.5µm |
| nrug | 80-120km | ≤550m (OM4) |
| Bandwidth | Unlimited (txoj kev xav) | Txwv los ntawm modal dispersion |
| Nqi | Siab dua (laser qhov chaw) | qis (LED/VCSEL) |
| **Siv Case** | Telecom/5G backhaul | Data centers/Campus |
SDM technologies suav nrog:
Multi-core fibers (MCF)**: 7-19 cores/fiber, qhia 1Pbps kis tau tus mob.
Ob peb hom fibers (FMF) **: Ntau txoj kev teeb pom kev zoo ib qho tseem ceeb.
Cov txiaj ntsig ntawm tus neeg teb xov tooj *: Txo cov kab mob duct; NTT xa MCF hauv Tokyo metro.
Cov fibers no:
- Qhia lub teeb los ntawm huab cua (tsis yog iav), txiav latency los ntawm 31% (1.46μs / km vs. 2.13μs / km).
- Cov ntawv thov phiaj xwm: HFT (kev lag luam ntau zaus), quantum networks.
* Kev Sib Tw *: Siab attenuation (~3dB/km) vs. SMF's 0.17dB/km.
A: Peb qhov tsom xam:
1. Fronthaul**: Deploy G.654.E fibers (tsawg poob, loj zoo cheeb tsam) rau > 400G wavelengths.
2. Cov hlwb me**: Micro-cables (≤6mm txoj kab uas hla) rau kev xa tawm hauv nroog loj.
3. SDN kev koom ua ke**: Automate fiber ntau faib ntawm OpenROADM.
A: Cov txiaj ntsig muaj xws li:
- 30% txo tus nqi ntawm tus neeg muag khoom-agnostic designs (piv txwv li, Vodafone's Open Fiber Initiative).
- Kev hloov kho sai dua (plug-thiab-ua si fiber ntau modules).
A:** Cov kev ntsuam xyuas tseem ceeb:
OTDR (Optical Time Domain Reflectometer) **: Kev ntsuas splice poob / so.
Insertion Loss Testing**: End-to-end dB poob pov thawj.
Chromatic Dispersion Test**: Qhov tseem ceeb rau> 100G coherent systems.
1. ** Kauj Ruam 1**: Nrhiav qhov txhaum nyob rau hauv 3m siv high-resolution OTDR.
2. ** Kauj Ruam 2**: Xa cov neeg hlau fiber ntau crawlers rau kev kho hauv av.
3. ** Kauj Ruam 3**: Siv fusion splicers nrog ≤0.02dB splice poob.
Cov hom tseem ceeb muaj xws li:
-Ib hom fiber ntau (SMF): ** Tsim los rau kev ncua deb, siab-bandwidth kis tau tus mob (xws li, 1310/1550nm wavelengths).
-Multimode fiber ntau (MMF): ** Siv rau kev ncua deb (xws li OM1 / OM2 / OM3 / OM4 / OM5 rau 850 / 1300nm).
Sab hauv / Sab nraum zoov cables: ** Armored, tsis armored, ribbon, los yog xoob-tube tsim.
- tshwj xeeb cables: ** FTTH (Tso cables), submarine cables, aerial cables, thiab lwm yam.
xav txog:
- ** nrug:** SMF rau> 1km; MMF rau ≤500m (nws txawv ntawm cov ntaub ntawv tus nqi).
- ** Nqi: ** MMF transceivers pheej yig dua tab sis SMF muaj kev pov thawj yav tom ntej.
- ** Daim Ntawv Thov: ** SMF rau kev sib txuas lus / ntev-ntev; MMF rau cov chaw zov me nyuam / LANs.
Cov lus qhia tseem ceeb:
- Tsis txhob tshaj ** rub nro ** (piv txwv li, ≤150N rau SMF).
- Tswj qhov tsawg kawg nkaus ** khoov vojvoog ** (piv txwv li, 20mm rau thaj qaum).
- Siv kom zoo ** splicing / connectors ** (LC / SC / MPO) thiab huv si ferrule kawg.
- Kuaj nrog ** OTDR / fais fab ntsuas ** tom qab kev teeb tsa.
Feem ntau ** 20-25 xyoo **, tab sis nyob ntawm:
- Environmental yam (nqus, UV raug).
- Mechanical stress (khoov, vibrations).
- Kev nce qib hauv thev naus laus zis tuaj yeem hloov kho ua ntej EOL.