Cov Lus Nug Txog Optical Fiber: Cov Lus Nug Thiab Cov Lus Teb Sai
Ua ib pawg khoom tseem ceeb, cov khoom siv fiber ntau muaj ntau yam kev paub txog kev siv tshuab. Tsab xov xwm no nthuav qhia qee lub ntsiab lus tseem ceeb hauv hom ntawv Q&A sai rau kev siv yooj yim.
1. Cov txheej txheem yooj yim siv los piav qhia txog cov yam ntxwv ntawm kev sib kis ntawm cov fiber ntau optical yog dab tsi?
Lus teb:Cov kev ntsuas tseem ceeb suav nrog kev txo qis, kev tawg, bandwidth, cutoff wavelength, thiab hom teb txoj kab uas hla (MFD).
2. Dab tsi ua rau cov fiber ntau optical attenuation?
Lus teb:Kev txo qis ntawm cov fiber ntau optical yog hais txog kev txo qis ntawm lub zog optical ntawm ob ntu ntawm ib lub fiber thiab hloov pauv nrog wavelength. Cov laj thawj tseem ceeb yog kev tawg, kev nqus, thiab kev poob ntawm cov khoom siv optical los ntawm cov connectors thiab splices.
3. Tus coefficient attenuation ntawm cov fiber optical txhais li cas?
Lus teb:Nws yog txhais tias yog qhov attenuation ib chav ntev ntawm cov fiber ntau optical hauv qab cov xwm txheej ruaj khov, feem ntau qhia hauv dB / km.
4. Yam dab tsi ua rau muaj suab nrov hauv cov kab ke sib txuas lus fiber ntau?
Lus teb:Cov chaw suab nrov muaj xws li:
- Suab nrov los ntawm qhov tsis txaus ntawm qhov kev puas tsuaj
- Kev hloov pauv ntawm qhov muag pom kev tsis sib xws
- Lub sijhawm jitter suab nrov
- Suab nrov thiab suab nrov thermal hauv lub receiver
- Modal suab nrov hauv lub fiber
- Suab nrov los ntawm kev nthuav dav ntawm lub plawv dhia los ntawm kev tawg
- Hom kev faib suab nrov hauv laser diodes (LDs)
- Zaus chirp suab nrov hauv LDs
- Suab nrov uas ua rau muaj kev cuam tshuam
5. Qhov bandwidth ntawm ib qho optical fiber cuam tshuam nrog dab tsi?
Lus teb:Fiber bandwidth yog hais txog qhov zaus hloov kho uas qhov amplitude ntawm lub zog kho qhov muag poob qis 50% (lossis 3 dB) los ntawm nws tus nqi xoom-zaus hauv qhov kev ua haujlwm hloov pauv fiber. Fiber bandwidth yog kwv yees li inversely proportional rau qhov ntev ntawm fiber, thiab cov khoom bandwidth-ntev tseem nyob ruaj khov.
Piv txwv khoom: LC rau SC Duplex OM3 50/125 Multimode Fiber Patch Cable, LSZH Jacket
6. Muaj pes tsawg hom fiber dispersion, thiab lawv muaj feem xyuam rau dab tsi?
Lus teb:Kev faib tawm ntawm cov fiber ntau suav nrog:
- Kev faib tawm Modal
- Cov khoom tawg
- Waveguide (cov qauv) kev tawg
Kev tawg ntawm qhov chaw nyob ntawm ob qho tib si yam ntxwv ntawm qhov chaw kho qhov muag thiab lub fiber nws tus kheej.
7. Yuav piav qhia txog cov yam ntxwv ntawm kev sib kis ntawm cov teeb liab uas kis mus rau hauv cov fiber ntau li cas?
Lus teb:Lawv tuaj yeem piav qhia siv peb yam kev ntsuas lub cev:
- Kev nthuav dav ntawm lub plawv dhia
- Cov kab xev fiber ntau
- Cov coefficient ntawm kev tawg
8. Qhov wavelength ntawm qhov txiav tawm yog dab tsi?
Lus teb:Qhov wavelength ntawm qhov txiav tawm yog qhov wavelength luv tshaj plaws uas tsuas yog hom yooj yim tuaj yeem nthuav dav hauv cov fiber. Rau cov fibers ib hom, qhov wavelength ntawm qhov txiav tawm yuav tsum luv dua li qhov wavelength ntawm kev ua haujlwm.
9. Kev sib kis ntawm cov fiber ntau cuam tshuam li cas rau kev ua haujlwm ntawm kev sib txuas lus?
Lus teb:Kev tawg ua rau cov teeb pom kev zoo dav dua thaum lub sijhawm kis, cuam tshuam rau:
- Qhov yuam kev me ntsis (BER)
- Kev sib kis nrug
- Kev ceev ntawm kev sib kis kab mob
10. Txoj kev rov qab tawg yog dab tsi?
Lus teb:Txoj kev rov qab scattering ntsuas qhov attenuation raws qhov ntev ntawm ib lub fiber. Txawm hais tias feem ntau lub zog kho qhov muag mus rau pem hauv ntej, ib feem me me yog tawg rov qab mus rau lub transmitter. Los ntawm kev soj ntsuam cov teeb liab rov qab dhau sijhawm, nws yog qhov ua tau los ntsuas:
- Qhov ntev ntawm fiber
- Kev txo qis ntawm cov fiber
- Kev tsis raws cai hauv zos
- Cov ntsiab lus tawg
- Kev poob ntawm cov splices thiab connectors
Piv txwv li khoom: MPO 24-Pin rau 3 × MPO 8-Pin OM4 50/125μm Multimode Fiber Cable, LSZH Jacket, Aqua
11. Thaj chaw tuag ntawm OTDR yog dab tsi, thiab nws cuam tshuam li cas rau kev sim?
Lus teb:Ib qho OTDR (Optical Time Domain Reflectometer) siv lub teeb rov qab los ntawm lub sijhawm xa hluav taws xob kom tau txais cov ntaub ntawv attenuation. Nws yog siv rau kev ntsuas fiber attenuation, splice losses, fault location, thiab distribution poob raws li fiber link.
Cov kev ua tau zoo tseem ceeb ntawm OTDR suav nrog:
- Ntau yam kev hloov pauv
- Kev rhiab heev
- Kev daws teeb meem
- Lub sijhawm ntsuas
- Thaj chaw tuag
Thaj chaw tuag yog qhov seem tam sim ntawd tom qab muaj kev cuam tshuam loj heev uas OTDR tsis tuaj yeem ntes lossis daws cov xwm txheej tom qab. Hauv kev sim ua haujlwm, cov fibers tso tawm thiab txais cov fibers feem ntau siv los txo qhov cuam tshuam ntawm thaj chaw tuag.
12. Cov fibers optical raug faib ua pawg li cas raws li kev faib tawm ntawm cov refractive index?
Lus teb:Cov fiber ntau optical tau muab faib ua:
- Cov fibers kauj ruam-index
- Cov fibers uas muaj qib index
Cov fibers kauj ruam-index muaj cov bandwidths nqaim thiab tsim nyog rau kev sib txuas lus luv luv thiab muaj peev xwm tsawg. Cov fibers qib-index muab cov bandwidths dav dua thiab tsim nyog rau cov kab ke sib txuas lus nruab nrab thiab siab.
13. Cov fibers optical raug faib ua pawg li cas raws li hom kev sib kis?
Lus teb:Cov fibers raug muab faib ua:
Ib Hom Fiber (SMF)
- Txoj kab uas hla ntawm lub hauv paus: kwv yees li 1–10 μm
- Txhawb nqa tsuas yog hom yooj yim xwb
- Haum rau kev sib kis mus deb, muaj peev xwm loj
Multimode Fiber (MMF)
- Lub hauv paus txoj kab uas hla: kwv yees li 50–60 μm
- Txhawb ntau hom kev nthuav dav
- Kev ua haujlwm kis tau qis dua li SMF
Hauv cov kab ke tiv thaiv tam sim no sib txawv siv cov channel tiv thaiv multiplexed, cov fibers multimode feem ntau siv ntawm cov khoom siv hloov pauv photoelectric hauv chav sib txuas lus thiab cov khoom siv tiv thaiv hauv chav tswj hwm.
14. Qhov tseem ceeb ntawm Numerical Aperture (NA) ntawm cov kauj ruam-index fiber yog dab tsi?
Lus teb:Tus lej Aperture (NA) qhia txog lub peev xwm sib sau ua ke ntawm lub fiber. Qhov loj dua NA, qhov muaj zog dua lub fiber lub peev xwm los sau cov teeb pom kev zoo.
15. Birefringence hauv cov fibers optical ib hom yog dab tsi?
Lus teb:Cov fibers ib hom txhawb nqa ob hom orthogonal polarization. Yog tias cov fiber tsis zoo tag nrho cylindrically symmetric, ob hom polarization yuav muaj cov refractive indices sib txawv. Qhov sib txawv kiag li ntawm cov refractive indices no hu ua birefringence.
Piv txwv li khoom: OM5 50/125 Multimode Fiber Optic Cable, Dual LC rau Dual LC, 5 m, OFNR Zipcord Jacket
16. Cov kev txwv ntawm kev khoov rau cov xov hluav taws xob optical yog dab tsi?
Lus teb:Lub vojvoog khoov yuav tsum yog:
- Yam tsawg kawg20 zauglub cable sab nraud txoj kab uas hla nyob rau hauv cov xwm txheej zoo li qub
- Yam tsawg kawg30 zauglub cable sab nraud txoj kab uas hla thaum lub sijhawm teeb tsa lossis txav mus los
17. Yuav tsum xav txog dab tsi hauv ADSS optical cable projects?
Lus teb:Peb qhov kev xav tseem ceeb txog kev siv tshuab yog:
- Kev tsim kho tshuab ntawm cov xov hluav taws xob optical
- Kev txiav txim siab ntawm cov ntsiab lus ncua
- Kev xaiv thiab kev teeb tsa cov khoom siv kho vajtse sib phim
18. Ob qho kev ua tau zoo tshaj plaws ntawm cov khoom siv fiber optic yog dab tsi?
Lus teb:Cov khoom siv fiber optic (feem ntau hu ua cov khoom siv sib txuas) feem ntau raug soj ntsuam los ntawm:
- Kev Poob Ntxig (IL)
- Kev Poob Rov Qab (RL)
19. Kev poob ntawm qhov ntxig rau hauv lub connector fiber optic yog dab tsi?
Lus teb:Kev poob ntawm kev ntxig yog hais txog kev txo qis ntawm lub zog xa tawm zoo los ntawm kev ntxig lub connector rau hauv txoj kev kho qhov muag. Kev poob qis ntawm kev ntxig yog qhov zoo dua. Raws li ITU-T cov lus pom zoo, kev poob ntawm kev ntxig feem ntau yuav tsum tsis pub tshaj0.5 dB.
20. Yuav ua li cas yog rov qab poob (kev cuam tshuam attenuation) nyob rau hauv ib tug fiber optic connector?
Lus teb:Kev poob rov qab ntsuas qhov ntau ntawm lub zog kho qhov muag uas rov qab los ntawm cov channel nkag vim yog kev cuam tshuam ntawm cov khoom txuas. Kev poob rov qab siab dua qhia txog kev ua tau zoo dua, nrog rau tus nqi ib txwm muaj ntawm25 dB lossis ntau dua.
Lub sijhawm tshaj tawm: Lub Rau Hli-04-2026