Yog tias koj tau tsim lossis teeb tsa PON network, CATV faib cov kab ke, lossis kev saib xyuas cov kais dej, koj tau siv fiber ntau optic txuas. Thiab yog tias koj xaiv qhov tsis ncaj ncees lawm - qhov sib faib tsis ncaj ncees, tsis ncaj ncees lawm thev naus laus zis, lub qhov rais tsis raug wavelength - koj pom txoj kev nyuaj thaum cov neeg siv ntawm qhov kawg ntawm kab tsis tau txais cov teeb liab lossis koj qhov kev nyeem OTDR tsis muaj kev nkag siab.
Fiber optic couplers yog cov khoom siv passive uas sib cais, sib txuas, lossis rov faib cov teeb liab kho qhov muag. Lawv suab yooj yim. Txoj kev xaiv tsis yog. Phau ntawv qhia no hais txog yuav ua li cas ob lub ntsiab kev lag luam thev naus laus zis sib txawv hauv kev ua tau zoo, yuav ua li cas los laij cov peev nyiaj poob rau koj qhov kev sib cais tshwj xeeb, thiab yuav ua li cas xaiv qhov kev sib txuas zoo rau FTTH, cov chaw saib xyuas cov ntaub ntawv, CATV, thiab cov ntawv xeem.
Dab tsi yog Fiber Optic Coupler tiag tiag
Lub fiber optic coupler siv lub teeb liab kho qhov muag los ntawm ib lossis ntau lub tswv yim fibers thiab faib nws mus rau ob lossis ntau qhov tso zis fibers - lossis rov qab. Lub teeb liab nyob hauv qhov chaw kho qhov muag txhua lub sijhawm. Tsis muaj hluav taws xob hloov pauv. Tsis xav tau lub zog. Yog vim li cas lawv thiaj hu ua passive devices.
Kev ntes: cais lub teeb txhais tau tias faib lub zog. Txhua zaus koj faib lub teeb liab, txhua qhov chaw tso zis tau txais lub zog tsawg dua li cov khoom nkag. Ib qho zoo meej 1 ×2 50/50 phua muab txhua qhov tso zis raws nraim ib nrab ntawm lub zog nkag - uas yog qhov tsawg kawg nkaus 3.0 dB poob rau ib qhov chaw tso zis, tsuas yog los ntawm physics ntawm kev faib lub zog. Tiag- cov khoom siv hauv ntiaj teb no ntxiv me me ntawm qhov poob ntau dhau los ntawm qhov tsawg kawg nkaus theoretical.
Qhov kev poob no yog cumulative. A 1 × 4 phua nqi tsawg kawg yog 6.0 dB. 1 × 8 tus nqi 9.0 dB. A 1 × 32 nqi 15.0 dB. Kev nkag siab qhov no yog lub hauv paus ntawm txhua qhov kev txiav txim siab xaiv cov khub sib txuas - yog tias koj cov peev nyiaj txuas tsis tuaj yeem nqus qhov poob, tsis muaj qhov sib txuas hauv ntiaj teb yuav ua rau lub network ua haujlwm.
FBT vs. PLC: Ob lub thev naus laus zis tseem ceeb
Muaj ntau txoj hauv kev los tsim cov khoom siv fiber ntau optic, tab sis hauv kev xyaum, ob lub thev naus laus zis tseem ceeb: FBT (Fused Biconical Taper) thiab PLC (Planar Lightwave Circuit).
FBT Couplers
FBT couplers yog tsim los ntawm twisting ob los yog ntau dua liab qab fibers ua ke, ces cua sov thiab stretching (fusing thiab tapering) cov hlws ris kom txog rau thaum lub fiber cores nyob ze txaus rau lub teeb rau ob peb ntawm lawv. Qhov sib cais yog tswj los ntawm qhov ntev thiab qib ntawm taper.
Lub zog:
- Tus nqi qis rau cov chaw nres nkoj tsawg (1 × 2, 1 × 4, 2 × 2)
- Nws tuaj yeem hloov mus rau qhov sib npaug sib npaug (piv txwv li, 10/90, 20/80, 30/70) yooj yim thiab pheej yig
- Kev ua tau zoo nyob rau hauv lub qhov rais nqaim wavelength
- Cov pob me me rau kev sib cais yooj yim
Kev txwv:
- Uniformity degrades raws li qhov chaw nres nkoj suav nce - 1 × 8 FBT tau pom tias tsis sib xws lub zog faib thoob plaws cov zis
- Wavelength- nyob ntawm qhov poob: kev ua tau zoo ntawm 1310 nm thiab 1550 nm tuaj yeem sib txawv loj tshwj tsis yog tias tau teev tseg ua dual -qhov rais
- Xyaum txwv rau 1 × 32 qhov siab tshaj plaws, nrog kev tsis sib haum xeeb tshaj 1 × 8
- Txhua qhov sib cais ntxiv yog qhov sib cais sib cais, ua kom cov khoom poob ntau dhau
Qhov zoo tshaj plaws rau:coj mus rhaub couplers rau kev saib xyuas (90/10, 95/5), me me CATV faib, bidirectional 2 × 2 couplers, tus nqi-sensitive low- suav splits.
PLC Splitters
PLC splitterssiv semiconductor lithography rau etch optical waveguide circuits mus rau silica iav substrate. Qhov kev sib cais tshwm sim ntawm lub nti - xav tias nws yog ib lub rooj tsav xwm kho qhov muag me me. Input thiab output fiber arrays yog bonded rau lub nti.
Lub zog:
- Zoo sib xws thoob plaws txhua qhov chaw tso zis - 1 × 32 PLC muab lub zog zoo ib yam rau txhua qhov chaw nres nkoj
- Wideband los ntawm kev tsim: ua haujlwm thoob plaws 1260-1650 nm yam tsis muaj wavelength - nyob ntawm qhov sib txawv
- Scales ua tau zoo rau cov chaw nres nkoj siab (1 × 64, 2 × 64)
- Compact rau siab phua ratios - ib 1 × 32 PLC yog NW nyuam qhuav loj dua 1 × 4 FBT
- Zoo dua ntev - lub sij hawm ruaj khov thiab kub ua haujlwm
Kev txwv:
- Tus nqi siab dua FBT rau qhov chaw nres nkoj tsawg (1 × 2, 1 × 4)
- Kev hloov pauv tsawg dua rau cov kev cai sib faib tsis sib npaug - feem ntau PLC splitters yog sib npaug- cais nkaus xwb
- me ntsis siab dua qhov poob qis ntawm 1 × 2 piv rau FBT (feem ntau 3.8 dB vs . 3.4 dB)
Qhov zoo tshaj plaws rau:GPON/XGS-PON FTTH kev xa tawm (1 × 8, 1 × 16, 1 × 32, 1 × 64), txhua daim ntawv thov xav tau kev faib hluav taws xob sib xws, cov tshuab dav dav nqa ntau lub wavelengths.
Kev sib piv
| Parameter | FBT Coupler | PLC Splitter |
|---|---|---|
| Technology | Fused fiber ntau taper | Lithographic waveguide ntawm silica nti |
| Tswv yim max ports | 1 × 32 (1 × 8 pom zoo) | 1 × 64 (los yog 2 × 64) |
| Uniformity (1 × 8) | ± 1.0-2.0 dB kev hloov pauv | ± 0.5-0.8 dB kev hloov pauv |
| Wavelength ntau | Ib leeg lossis ob lub qhov rais (1310/1550 nm) | Dav dav 1260-1650 nm |
| Tsis sib npaug sib faib | Yooj yim thiab pheej yig (10/90, 20/80, thiab lwm yam) | Nyuaj / kev cai txiav txim |
| Ua haujlwm temp | -20℃rau +70℃ib txwm | -40℃rau +85℃ib txwm |
| Nqe (1 × 2) | $ | $$ |
| Nqe (1 × 32) | $$$ (cascaded FBT) | $$ (ib qho chip) |
Lub crossover point yog nyob ib ncig ntawm 1 × 8. Hauv qab no, FBT feem ntau pheej yig dua. Tshaj ntawd, PLC yeej ntawm ob qho tib si thiab tus nqi.
Split Ratios and Poob: Lej Koj Xav Tau
Txhua qhov txuas / splitter muaj qhov theoretical yam tsawg kawg nkaus qhov kev poob qis txiav txim siab los ntawm qhov sib cais. Ntawm no yog lub rooj siv:
| Split Ratio | Theoretical Min Loss | Yam PLC Poob | Yam FBT Loss |
|---|---|---|---|
| 1×2 | 3.0dB ua | 3.2-3.8 dB | 3.2-3.6 dB |
| 1×4 | 6.0dB ib | 6.5-7.2 dB | 6.5-7.5 dB |
| 1×8 | 9.0db ua | 9.5-10.5 dB | 10.0-12.0 dB |
| 1×16 | 12.0 dB | 12.5-13.5 dB | 13.5-16.0 dB |
| 1×32 | 15.0 dB | 15.5–17.0 dB | 17.0–21.0 dB |
| 1×64 | 18.0 dB | 18.5–21.0 dB | Tsis siv |
Daim ntawv ceeb toom yuav ua li cas FBT poob diverges los ntawm PLC raws li chaw nres nkoj suav nce. Ntawm 1 × 32, FBT txuas tuaj yeem yog 4-5 dB phem dua PLC - uas yog qhov sib txawv ntawm qhov txuas FTTH ua haujlwm thiab qhov tuag.
Tiag -Kev Piv Txwv Ntiaj Teb: GPON FTTH Link Budget
Tus qauv GPON system (ITU-T G.984) muaj qhov nyiaj siv ntau tshaj plaws ntawm 28 dB ntawm OLT thiab ONT. Ntawm no yog yuav ua li cas ib tug raug 1 × 32 xa mus stacks:
| Cheebtsam | Poob |
|---|---|
| PLC splitter (1×32) | 17.0dB ib |
| Feeder fiber ntau (10 km × 0.35 dB / km) | 3.5dB ua |
| Kev faib tawm fiber ntau (2 km × 0.35 dB / km) | 0.7dB ib |
| SC APC connectors(6 khub × 0.3 dB) | 1.8dB ib |
| Splice cov ntsiab lus (4 × 0.1 dB) | 0.4dB ib |
| Tag nrho | 23.4 dB |
| Cov npoo seem | 4.6dB ib |
Qhov ntawd 4.6 dB npoo nyiaj rau kev laus, qhov kub thiab txias hloov pauv, thiab yav tom ntej splices. Yog tias koj tau siv FBT txuas ntawm 21 dB hloov PLC ntawm 17 dB, koj yuav nyob ntawm 27.4 dB - txaus ntshai ze rau 28 dB txwv nrog tsuas yog 0.6 dB npoo. Ib qho qias neeg txuas thiab koj tawm.
Qhov no yog vim li cas txhua tus neeg siv FTTH siv PLC splitters rau 1 × 16 thiab siab dua. Cov peev nyiaj poob tsis zam txim rau FBT ntau dhau ntawm qhov sib faib siab.
Coupler Shapes thiab lawv siv rau dab tsi
Tshaj li qhov sib piv thiab thev naus laus zis, cov khoom sib txuas tuaj nyob rau hauv qhov sib txawv topological configuration:
Y-coupler (1 × 2):Qhov yooj yim tshaj phua. Ib input, ob outputs. Siv rau cov teeb liab tapping, redundancy paths, thiab bidirectional saib xyuas. Muaj raws li FBT lossis PLC.
T Coupler (tsis sib npaug):A 1 × 2 nrog txhob txwm faib tsis sib npaug - 90/10, 80/20, 70/30. Yuav luag ib txwm FBT. Siv rau kais saib xyuas qhov twg koj xav ua piv txwv ib feem me me ntawm lub teeb liab yam tsis muaj kev txo qis txoj hauv kev loj zog.
X coupler (2 × 2):Ob inputs, ob outputs. Muaj nuj nqi raws li ob qho tib si splitter thiab combiner ib txhij. Qhov tseem ceeb rau kev sib txuas lus bidirectional tshaj ib qho fiber ntau thiab tsim cov interferometric sensors. Ib txwm FBT.
Lub hnub qub coupler (N × N):Ntau inputs, ntau outputs nrog sib npaug faib. Siv nyob rau hauv legacy LAN topologies thiab ib co sensor networks. Tsis tshua muaj hnub no.
Ntoo Coupler (1 × N):Ib qho kev tawm tswv yim rau ntau qhov tawm. Lub workhorse configuration rauPLC splitters hauv FTTH/PON - 1×8, 1×16, 1×32, 1×64.
Installation thiab xaiv tswv yim
Txuas hom connector rau koj lub network.Feem ntau FTTH splitters xaus rau hauvSC APC connectorsrau kev poob qis. Cov ntaub ntawv chaw saib xyuas cov kais dej feem ntau siv LC UPC. Sab nraum zoov faib siv pigtailed (liab fibers) splitters rau fusion splicing. Qhia qhov txuas ntawm lub sijhawm txiav txim - teb- txiav PLC splitterpigtailsnkim sijhawm thiab qhia txog kev poob ntxiv.
Tsis txhob cascade FBT splitters thaum koj tuaj yeem siv tib PLC.Peb tau pom cov neeg tsim khoom tsim 1 × 16 cais los ntawm cascading plaub theem ntawm 1 × 2 FBT couplers. Nws ua haujlwm ntawm daim ntawv. Hauv kev xyaum, qhov kev poob ntau dhau los ntawm plaub qhov sib txuas / txuas txuas ntxiv rau plaub qhov sib cais FBT cov khoom siv hluav taws xob los ntawm kev sib txuas pob nyiaj siv. Ib qho 1 × 16 PLC splitter ua tib txoj haujlwm hauv ib lub cuab yeej nrog qis dua tag nrho.
Xaiv qhov sib cais tsis sib npaug rau kev saib xyuas cov kais dej.Yog tias koj tab tom tso lub ntsuas ntsuas mus tas li rau hauv fiber ntau rau OTDR lossis kev saib xyuas lub zog, siv 95/5 lossis 90/10 FBT txuas. Txoj hauv kev tseem ceeb poob tsuas yog 0.2-0.5 dB thaum lub kais chaw nres nkoj tau txais cov teeb liab txaus rau kev ntsuas. Tsis txhob siv 50/50 sib cais rau kev saib xyuas - koj yuav txiav lub zog tseem ceeb hauv ib nrab yam tsis muaj laj thawj.
Tshawb xyuas wavelength compatibility.Yog tias koj lub kaw lus nqa 1310 nm, 1490 nm, thiab 1550 nm ib txhij (feem ntau hauv GPON nrog video overlay), siv lub wideband PLC splitter, tsis yog ib qho -window FBT. Ib leeg-window FBT couplers tuaj yeem pom 1–3 dB qhov poob ntxiv ntawm wavelengths sab nraum lawv lub qhov rais tsim.
Kuaj tom qab installation.Ntsuas qhov poob ntawm txhua qhov chaw nres nkoj splitter nrog lub ntsuas hluav taws xob kho qhov muag. Muab piv rau cov chaw tsim khoom spec daim ntawv. Yog tias ib qho chaw nres nkoj tshaj qhov tshwj xeeb los ntawm ntau dua 0.5 dB, tshawb xyuas cov khoom siv qias neeg lossis cov kab sib txuas tsis zoo ua ntej yuav cem lub splitter.
Cov lus nug nquag
Dab tsi yog qhov sib txawv ntawm qhov sib txuas, qhov sib cais, thiab lub tshuab ua ke?
Lawv yog tag nrho cov subsets ntawm tib lub cuab yeej tsev neeg. Lub splitter muaj ib qho kev tawm tswv yim thiab ntau qhov tawm (1 × N). Ib qho kev sib xyaw ua ke muaj ntau yam inputs thiab ib qho tso zis (N × 1) - lub cev zoo ib yam rau lub splitter siv rov qab. Coupler yog cov ntsiab lus dav dav uas suav nrog kev teeb tsa: 1 × N, N × 1, 2 × 2, N × N.
Kuv puas tuaj yeem siv multimode coupler ntawm ib qho -mode fiber?
Tsis yog. Ib qho -hom thiab multimode couplers yog tsim los rau cov tub ntxhais sib txawv (9 µm vs . 50 µm). Kev siv ib qho multimode coupler rau ib zaug - hom fiber ntau ua rau poob siab heev vim hais tias cov waveguide geometry tsis phim. Ib txwm phim lub coupler rau hom fiber ntau.
Kuv yuav xaiv li cas ntawm FBT thiab PLC?
Rau 1 × 2 lossis 2 × 2 splits, tshwj xeeb tshaj yog nrog qhov sib npaug sib npaug, siv FBT - nws pheej yig dua thiab ua tau zoo. Rau 1 × 8 thiab siab dua, lossis ib daim ntawv thov uas xav tau kev ua haujlwm dav dav (ntau -wavelength PON), siv PLC. Qhov zoo sib xws thiab poob qhov zoo ntawm PLC ntawm cov chaw nres nkoj siab yog qhov txiav txim siab.
Kuv tuaj yeem muab PLC splitters thiab FBT couplers nyob qhov twg?
Evolux Fiber ntau lawmPLC fiber ntau optic splitters(1 × 2 txog 1 × 64, ABS lub thawv / liab qab fiber ntau / khib-mount cassette), FBT couplers, thiabfiber ntau optic connectorsnrog OEM customization thiab 100% Hoobkas kuaj.Tiv tauj peb pab neegrau ntim pricing, custom split ratios, thiab dawb kuaj.
