Fiber optic attenuator yog ib qho khoom siv kho qhov muag uas txhob txwm txo cov teeb liab lub zog los ntawm qhov tshwj xeeb, ntsuas hauv decibels (dB). Nws tsis hloov, ua kom nrov, lossis hloov kho lub teeb liab - nws tsuas yog txo qis lub zog kho qhov muag mus txog qhov txais tau.
Vim li cas leej twg xav ua kom tsis muaj zog fiber ntau ntawm lub hom phiaj? Vim hais tias nyob rau hauv ntau qhov tiag - ntiaj teb kev sib txuas, lub teeb liab tuaj txog ntawm lub receiver muaj zog heev. Thaum tau txais lub hwj chim tshaj qhov ntsuas qhov siab tshaj plaws ntawm cov khoom siv nkag, qhov tshwm sim yog txais kev txaus siab - me ntsis yuam kev, teeb liab distortion, thiab degraded link kev ua tau zoo. Qhov no yog qhov tshwj xeeb tshaj yog nyob rau ib zaug luv luv - hom khiav qhov twg txoj kev poob tsawg tsawg thiab cov transceiver cov zis tau yooj yim overwhelms deb -end receiver. Attenuators daws qhov no los ntawm kev nqa lub teeb liab rov qab rau hauv lub receiver lub qhov rais ua haujlwm.
Tshaj li kev tiv thaiv tus neeg txais, fiber ntau optic attenuators tau dav siv hauv kev kuaj sim, kev siv cov kab ke siv tau, thiab kev ntsuas lub zog channel. Phau ntawv qhia no hais txog qhov lawv ua haujlwm li cas, hom tseem ceeb muaj, thiab cov kev xaiv siv tau raws li kev txheeb xyuas nyiaj txiag txuas es tsis yog kev kwv yees.
Fiber Optic Attenuator Ua li cas?
Txhua optical receiver muaj ib tug txhais input zog ntau yam. Cov ciam teb qis dua yog txais kev nkag siab zoo - lub zog yam tsawg kawg nkaus uas yuav tsum tau ua rau qhov kev lees paub me ntsis yuam kev (BER). Lub ciam teb sab sauv yog qhov siab tshaj plaws input zog, qee zaum hu ua qhov overload point lossis qib saturation. Cov txiaj ntsig no tau luam tawm hauvcov ntaub ntawv transceiverthiab sib txawv ntawm hom module, cov ntaub ntawv tus nqi, thiab wavelength.
Yog hais tias qhov tau txais lub hwj chim kho qhov muag poob qis dua qhov kev xav, qhov txuas poob los yog ua rau yuam kev ntau dhau. Yog hais tias nws tshaj qhov siab tshaj plaws input theem, lub photodetector saturates thiab lub receiver yuav tsis paub qhov txawv ntawm ib tug thiab pes tsawg reliably. Tus kho qhov muag attenuator hais txog qhov teeb meem thib ob: nws ntxiv qhov kev tswj hwm, qhov kev xav tau ntawm qhov poob yog li lub teeb liab tuaj txog ntawm lub receiver nyob rau hauv qhov kev nyab xeeb kev khiav hauj lwm ntau.
Qhov kev tswj tsis tau no txawv ntawm qhov tsis txhob txwm uapoob poobtshwm sim los ntawm qias neeg connectors, tsis zoo splices, los yog fiber ntau khoov. Tus attenuator muab qhov tseeb, rov qab txo qis - feem ntau teev nrog kev kam rau siab ntawm ± 0.5 dB rau cov nqi qis dua 10 dB thiab ± 10% rau cov nqi siab dua, raws li cov qauv tsim nyog xws li Telcordia GR-910-CORE.
Thaum twg Koj Xav Tau Fiber Optic Attenuator?
Luv -Txoj Kev Txuas Txuas Nrog Ntau Lub Hwj Chim
Qhov xwm txheej tshwm sim feem ntau yog qhov luv fiber ntau khiav - piv txwv li, 1 km lossis 2 km ib leeg - hom kev sib txuas ntawm ob lub keyboards hauv tib lub tsev. Lub transmitter tso tawm ntawm, hais, 0 dBm, thiab tag nrho txoj kev poob ntawm fiber ntau, connectors, thiab thaj panels tsuas yog 1-2 dB. Yog hais tias lub receiver lub siab tshaj plaws input yog −3 dBm, lub hwj chim tau txais yog zoo tshaj lub overload pib. A 5 dB tsau attenuator ntawm lub receiver chaw nres nkoj coj theem rov qab mus rau hauv ntau yam. Qhov xwm txheej no tshwm sim ntau zaus hauv cov chaw zov me nyuam, cov pob txha hauv tsev kawm ntawv, thiab cov kev sib txuas hauv nroog luv nyob qhov twgib -mos SFP modulesraug xa mus rau qhov deb deb tshaj lawv qhov ntsuas siab tshaj plaws.
Testing thiab System Margin Validation
Thaum lub sij hawm lees txais kev sim lossis kev daws teeb meem, cov kws tsim khoom siv cov khoom siv kho qhov muag sib txawv (VOAs) los cheb lub receiver input power hla ntau yam thiab saib seb qhov twg yuam kev pib. Cov txheej txheem no, qee zaum hu ua qhov kev ntsuam xyuas rhiab heev lossis qhov kev xeem margin, qhia ntau npaum li cas headroom qhov txuas ua ntej nws ua tsis tiav. VOAs kuj tseem siv los sim ua cov fiber ntau khiav ntev dua yam tsis muaj lub cev ntxiv fiber ntau, uas yog qhov muaj txiaj ntsig zoo rau kev tsim nyog txuas hauv chav kuaj ua ntej kev xa tawm. CovFiber Optic Association cov lus qhia poob nyiaj txiagpiav qhia txog qhov kev suav nyiaj siv hluav taws xob cuam tshuam li cas rau cov neeg txais cov tswv yim txwv thiab cov kab ke.
Channel Power Balancing hauv WDM Systems
Nyob rau hauv lub wavelength - faib multiplexed (WDM) tes hauj lwm, cov kab sib txawv tuaj yeem tuaj txog ntawm lub receiver nrog lub zog tsis sib npaug vim lub amplifier nce qaij lossis txawv qhov poob. Attenuators - feem ntau ntawm -channel VOAs - yog siv los sib npaug ntawm lub zog thoob plaws cov channel kom cov receiver array txheej txheem tag nrho cov wavelengths nyob rau hauv lub qhov rais fais fab sib xws.
Yuav Ua Li Cas Fiber Optic Attenuators Ua Haujlwm?
Internal mechanism nyob ntawm tus tsim attenuator. Cov txheej txheem feem ntau suav nrog doped fiber absorption, qhov ntev ntawm qhov tshwj xeeb kho fiber absorbs ib feem ntawm lub teeb; tswj huab cua-gap misalignment, qhov sib txawv me me los yog lateral offset ntawm fiber cores txo coupling efficiency; and neutral-density filter elements, where a thin absorptive glass element is placed in the optical path.
Cov txheej txheem tshwj xeeb cuam tshuam rau qhov poob,rov poob, polarization dependent poob (PDL), thiab wavelength rhiab heev.
Piv txwv li, doped-fiber attenuators feem ntau muaj qhov cuam tshuam rov qab qis heev, ua rau lawv tsim nyog rau cov kev sib txuas uas rov qab poob kev ua tau zoo yog qhov tseem ceeb - xws li cov sivAPC{0}} cov khoom sib txuas. Huab cua-gap attenuators, los ntawm qhov sib txawv, tuaj yeem pom qhov rov qab xav tau siab dua tshwj tsis yog tsim tshwj xeeb los txo nws.
Kev lag luam tsim nyog ntawm fiber ntau optic attenuators feem ntau ua raws Telcordia GR -910-CORE, uas txhais tau hais tias yuav tsum muaj rau qhov tseeb ntawm attenuation, ib puag ncig stability, thiab txhua yam kav ntev. Kev ntsuas ntawm cov khoom-theem attenuation thiab qhov poob qhov ntsuas tau piav qhia hauv IEC 61300-3-4. Cov qauv no xyuas kom meej tias daim ntawv lo "5 dB" attenuator tiag tiag muab ze rau 5 dB ntawm kev poob thoob plaws nws cov haujlwm teev tseg.
Fixed vs. Variable Fiber Optic Attenuators: Koj Yuav Tsum Xaiv Ib Qhov Dab Tsi?
Ob pawg tseem ceeb yog cov attenuators ruaj khov, uas muab ib qho kev hloov pauv tsis tau hloov pauv tus nqi, thiab qhov sib txawv ntawm qhov kho qhov muag attenuators (VOAs), uas tso cai rau tus neeg siv los kho qhov attenuation dhau ib ntu lossis nce qib.
| Hom | Zoo tshaj rau | Tej yam attenuation range | Qhov txiaj ntsig tseem ceeb | Qhov tseem ceeb txwv |
|---|---|---|---|---|
| Tsau attenuator | Kev txhim kho tas mus li uas paub, ruaj khov zog | 1 dB txog 25 dB (tus qauv nce) | Yooj yim, ruaj khov, tus nqi qis, tsis muaj qhov txav mus los | Tsis tuaj yeem hloov kho tom qab kev teeb tsa |
| Variable attenuator (VOA) | Kev ntsuam xyuas (lab), cov npoo cheb, cov tshuab nrog cov kev hloov pauv | 0-30 dB lossis dav, nyob ntawm tus qauv | Adjustable, reusable nyob rau hauv txawv scenarios | Tus nqi siab dua, ntau dua, tuaj yeem txav mus rau lub sijhawm |
Thaum siv lub attenuator ruaj khov:Xaiv qhov ruaj khov thaum qhov txuas hluav taws xob pob nyiaj siv tau zoo- nkag siab thiab qhov xav tau ntawm tus nqi attenuation ruaj khov. Ib qhov txuas luv luv uas xa tawm 6 dB ntau lub zog ntau dua li qhov tau txais qhov siab tshaj plaws yog qhov tseeb rau qhov ruaj khov 7 dB attenuator. Tsau attenuators yog tus qauv xaiv rau kev xa mus tas li nyob rau hauv thaj chaw, cov khoom siv khib nyiab, thiab cov txheej txheem cabling.
Thaum siv lub attenuator sib txawv:Xaiv qhov sib txawv thaum koj tseem cim qhov txuas, ua qhov kev lees paub, lossis xav tau ib lub cuab yeej uas ua haujlwm hla ntau qhov kev teeb tsa. Cov kws tshaj lij ua cov neeg txais kev nkag siab cheb, lossis cov kws tshaj lij ua haujlwm tau txais txiaj ntsig ntawm cov ntawv txuas tshiab, feem ntau siv VOA ua ntej. Thaum tus nqi attenuation yuav tsum tau lees paub, ntau pab pawg tom qab ntawd hloov lub VOA nrog lub attenuator ruaj khov rau lub sijhawm ntev - xa mus.
Fiber Optic Attenuator Hom los ntawm Lub Cev Daim Ntawv
Tshaj li qhov sib txawv ntawm qhov ruaj khov / sib txawv, cov attenuators tuaj nyob rau hauv ntau lub cev configurations. Qhov zoo ntawm daim ntawv yog nyob ntawm qhov chaw attenuator zaum hauv qhov txuas thiab seb lub cabling nyob ib puag ncig yog li cas.
Plug-Style Attenuators (Txiv neej-rau- Poj Niam, Tsim-Tawm)
Plug-style los yog tsim-tawm attenuator muaj ib tug txiv neej connector ntawm ib kawg thiab ib tug poj niamadapter chaw nres nkojntawm lwm yam. Koj ntsaws nws ncaj qha rau hauv qhov chaw nres nkoj transceiver lossis thaj vaj huam sib luag, ces txuas raupatch kabnyob rau hauv lub attenuator lub adapter sab. Qhov no yog qhov feem ntau daim ntawv tseem ceeb tshaj plaws rau kev txhim kho ruaj khov. Nws yog compact, yuav tsum tsis muaj hardware ntxiv, thiab nyob twj ywm nyob rau hauv qhov chaw ib zaug ntsia.
Bulkhead los yog Adapter-Style Attenuators (poj niam-rau- Poj niam)
Ib qho adapter -style attenuator ua haujlwm zoo li tus qauv fiber ntau optic adapter - nrog ib tug poj niam chaw nres nkoj ntawm txhua sab - tab sis qhia txog qhov kev txiav txim siab ntawm ob lub fibers txuas. Cov no muaj txiaj ntsig zoo hauv thaj chaw ib puag ncig uas koj xav ntxiv kev txo qis yam tsis hloov pauv cov kab hluav taws xob.
Inline lossis Patch-Cable-Style Attenuators
Qee cov attenuators tau tsim rau hauv lub rooj sib txuas cable, nrog cov khoom sib txuas ntawm ob qho kawg thiab cov khoom attenuating hauv nruab nrab. Inline variable attenuators muaj nyob rau hauv chav kuaj thiab lub rooj ntev zaum - kuaj ib puag ncig, qhov chaw uas lawv ua raws li qhov yooj yim hloov taw tes hauv txoj kev kho qhov muag.
Fiber Optic Attenuator Hom los ntawm Connector, Polish, thiab Fiber Hom
Attenuators tsis tuaj yeem hloov pauv ntawm cov khoom sib txuas, cov qauv polish, lossis hom fiber ntau. Mismatching ib qho ntawm cov kev txwv no yog ib qho ntawm feem ntau yuam kev yuam kev.
LC, SC, FC, thiab ST Fiber Attenuator Connectors
Attenuators muaj nyob nrog txhua tus qauvfiber optic connector hom. Feem ntau siv niaj hnub noLC attenuators muaj(tseem ceeb hauv cov ntaub ntawv niaj hnub thiab cov cuab yeej ua lag luam) thiabSC cov attenuators(feem ntau hauv xov tooj, PON, thiab cov lag luam qub).FCthiabSTattenuators tseem pom nyob rau hauv cov cuab yeej cuab tam thiab qee qhov chaw sim tshwj xeeb. Ib txwm phim lub attenuator connector rau qhov chaw nres nkoj lossis thaj vaj huam sib luag nws yuav ua phooj ywg nrog.
UPC vs. APC Attenuators
Connector polish hom tseem ceeb. UPC (Ultra Physical Contact) attenuators muaj lub tiaj tus - polished endface thiab muab kev rov qab poob ib ncig ntawm −50 dB. APC (Angled Physical Contact) attenuators muaj 8-degree angled endface uas coj lub teeb pom kev rau hauv cladding, ua tiav rov qab poob ntawm −60 dB lossis zoo dua. APC attenuators yuav tsum muaj nyob rau hauv cov kab ke rhiab rau rov qab xav txog, suav nrog FTTx, PON, thiab WDM tes hauj lwm. UPC thiab APC connectors yog lub cev tsis sib haum xeeb thiab yuav tsum tsis txhob muaj kev sib raug zoo ua ke - ua li ntawd ua rau lub ntsej muag puas tsuaj thiab ua rau muaj teeb meem loj.
Tib -Mode vs. Multimode Attenuators
Attenuators yog tsim los rau ob qho tib sitib - hom fiber ntau(feem ntau 9/125 μm, ua haujlwm ntawm 1310 nm lossis 1550 nm) lossismultimode fiber ntau(50/125 μm lossis 62.5 / 125 μm, ua haujlwm ntawm 850 nm lossis 1300 nm). Qhov loj ntawm cov tub ntxhais fiber ntau, cov lej aperture, thiab kev ua haujlwm wavelength txawv ntawm ob, yog li lub attenuator tsim rau tib hom - hom yuav tsis ua kom raug ntawm qhov sib txuas sib txuas, thiab rov ua dua. Xyuas cov transceiver thiab fiber ntau hom ua ntej xaiv lub attenuator lub fiber specification.
Yuav Ua Li Cas Xaiv Txoj Cai Fiber Optic Attenuator: Ib Kauj Ruam -los ntawm - Cov kauj ruam
Kev xaiv attenuator raug yog qhov teeb meem ntawm kev siv nyiaj txiag. Lub hom phiaj yog xam lub zog uas tau txais thiab muab piv rau tus neeg txais kev ua haujlwm. Ntawm no yog ib qho kev ua haujlwm ua haujlwm:
Kauj ruam 1: Nrhiav lub transmitter tso zis zog.Qhib cov ntaub ntawv transceiver thiab nrhiav qhov tsawg kawg nkaus thiab siab tshaj qhov xa tawm (Tx) tso zis hluav taws xob. Piv txwv li, 10GBASE-LR SFP + module yuav qhia txog Tx tso zis ntawm −8.2 dBm rau +0.5 dBm.
Kauj ruam 2: Kwv yees tag nrho qhov txuas poob.Ntxiv tag nrho cov kev poob hauv txoj kev: fiber ntau attenuation (dB / km × nrug), connector poob (feem ntau 0.2-0.5 dB ib khub niam txiv), splice poob yog muaj, thiab lwm yam passive Cheebtsam.Juniper's power budget phau ntawv qhiamuab piv txwv ua haujlwm ntawm qhov kev suav no.
Kauj Ruam 3: Xam kwv yees tau txais lub zog.Tshem tawm tag nrho qhov txuas tsis tau los ntawm cov khoom xa tawm: kwv yees Rx Lub Hwj Chim=Tx Output − Tag Nrho Txuas Loss.
Kauj Ruam 4: Sib piv nrog cov receiver lub tswv yim ntau yam.Xyuas cov ntaub ntawv transceiver rau receiver rhiab heev (tsawg kawg Rx zog) thiab siab tshaj Rx input zog (overload level). Yog tias qhov kwv yees tau txais lub zog tshaj qhov siab tshaj plaws cov tswv yim, koj xav tau attenuation.
Kauj ruam 5: Txiav txim siab tus nqi attenuation yuav tsum tau.Lub attenuator yuav tsum txo tau txais lub hwj chim mus rau ib theem yam xyuam xim nyob rau hauv lub receiver qhov ntau ntawm - tsis yog nyob rau hauv qis dua tus taw tes overload, tab sis nrog 1-3 dB ntawm margin. Piv txwv li, yog tias kwv yees Rx lub zog yog +1 dBm thiab tus txais siab tshaj plaws yog −3 dBm, koj xav tau tsawg kawg yog 4 dB ntawm attenuation. A 5 dB attenuator muab cov paj tsim nyog.
Kauj Ruam 6: Txheeb xyuas lwm cov kev txwv.Paub meej tias lub attenuator sib phim hom connector, polish (UPC lossis APC), fiber ntau hom (ib zaug -mode lossis multimode), thiab kev khiav hauj lwm wavelength ntawm qhov txuas.
Kauj Ruam 7: Tsau lossis hloov pauv?Yog tias qhov txuas txuas mus tas li thiab tus nqi xav tau yog qhov tseeb, xa ib lub attenuator ruaj khov. Yog tias koj tseem siv tau qhov txuas lossis cia siab tias yuav hloov pauv, siv lub attenuator sib txawv thaum kuaj, tom qab ntawd hloov mus rau ruaj rau ntau lawm.
Koj xav tau pes tsawg dB ntawm Attenuation?
Qhov no yog cov lus nug uas ua rau feem ntau yuam kev. Cov lus teb yog ib txwm los ntawm qhov txuas pob nyiaj siv - tsis yog los ntawm "nqi tshaj plaws" tus nqi pib.
Ib qho yuam kev feem ntau yog xaiv qhov siab dua - dua - xav tau tus nqi "tsuas yog kom nyab xeeb." Ib qho 10 dB attenuator ntawm qhov txuas uas tsuas yog xav tau 3 dB thawb lub teeb liab hauv qab cov neeg txais kev xav, tsim qhov teeb meem rov qab. Hauv qab - attenuation kuj tseem muaj kev pheej hmoo: 3 dB attenuator ntawm qhov txuas uas xav tau 7 dB tseem tso tus neeg txais khoom ntau dhau.
Yog tias koj tseem tsis tau muaj pes tsawg tus lej, siv qhov phem tshaj plaws - cov ntaub ntawv xa tawm (tx ntau tshaj) thiab qhov zoo tshaj plaws - cov ntaub ntawv txuas poob (tsawg kawg nkaus) los kwv yees qhov siab tshaj plaws tau txais lub zog. Qhov ntawd ua rau koj muaj qhov pib ntawm kev saib xyuas. Yog tias qhov tsis paub tseeb, sim nrog lub attenuator sib txawv ua ntej, ntsuas lub zog tau txais nrog lub ntsuas hluav taws xob kho qhov muag, thiab sau cov nqi tiag tiag uas xav tau ua ntej xaj cov attenuators kom muaj nuj nqis.
Feem ntau yuam kev thaum xaiv Fiber Optic Attenuators
Kev txiav txim los ntawm tus nqi dB ib leeg.Tus nqi attenuation tsuas yog ib qho parameter xwb. Ib qho SC/UPC ib zaug -hom 5 dB attenuator yog qhov tsis ncaj ncees lawm rau qhov chaw nres nkoj LC/APC, txawm tias tus nqi dB yuav raug. Ib txwm txheeb xyuas hom connector, polish, fiber ntau hom, thiab wavelength.
Kev sib xyaw UPC thiab APC.Txuas lub UPC attenuator rau hauv qhov chaw nres nkoj APC (lossis qhov thim rov qab) ua rau muaj kev nkag siab siab, tsis zoo rov qab los, thiab muaj peev xwm ua rau lub cev puas tsuaj rau qhov kawg ntawm qhov txuas. Xim coding pab - UPC connectors feem ntau yog xiav, APC connectors ntsuab - tab sis nco ntsoov xyuas cov ntawv lo.
Tsis quav ntsej txog qhov txuas pob nyiaj siv.Xaiv tus nqi "nrov" zoo li 5 dB lossis 10 dB yam tsis tau kuaj xyuas cov ntaub ntawv transceiver yog qhov kwv yees, tsis yog kev txiav txim siab tsim. Qhov tshwm sim yog qhov seem seem overload lossis tsis tsim nyog teeb liab poob.
Siv ib tug sib txawv attenuator mus tas li qhov chaw ruaj yuav txaus.VOAs yog cov cuab yeej xeem muaj txiaj ntsig, tab sis lawv raug nqi ntau dua, tuaj yeem txav tau, thiab ntxiv qhov nyuaj uas tsis tsim nyog rau qhov txuas mus tas li. Thaum qhov kev txiav txim siab yuav tsum tau lees paub, hloov lub VOA nrog ib chav nyob ruaj khov.
Tsis nco qab tias qhov txuas luv luv yog qhov ua rau.Tus attenuator kho cov tsos mob (hnyav ntau dhau), tab sis lub hauv paus ua rau feem ntau yog lub tshuab xa hluav taws xob tsim kom ntev ntev dua li qhov sib txuas tiag tiag. Qee zaum, siv lub luv luv - ncav cuag transceiver module lossis kho lub zog xa hluav taws xob (yog tias lub module txhawb nws) yuav yog qhov kev daws teeb meem ntev dua -lub sij hawm ntau dua li kev ntxiv passive attenuation.
Thaum tus Attenuator yuav tsis yog txoj kev daws teeb meem
Tsis yog txhua lub hwj chim- hais txog qhov teeb meem yog daws tau zoo tshaj plaws nrog lub attenuator. Yog tias qhov txuas tau ntsib qhov tsis sib xws uas tsis meej meej tshwm sim los ntawm kev txais ntau dhau, qhov teeb meem tuaj yeem yog cov khoom sib txuas qias neeg, kev tso tawm ntau dhau, kev tawg ntawm fiber ntau, lossis lub wavelength mismatch. Ntxiv attenuation rau qhov txuas uas twb tau nyob rau hauv -powered yuav tsuas ua rau tej yam phem. Ib txwm paub meej tias - qhov zoo tshaj plaws nrog lub ntsuas hluav taws xob kho qhov muag - tias lub hwj chim tau txais yog tiag tiag saum tus txais qhov siab tshaj plaws ua ntej txhim kho lub attenuator.
Ib yam li ntawd, nyob rau hauv cov kev sib txuas uas lub transceiver txhawb kev tsim cov zis hluav taws xob, kho cov qib Tx hauv hluav taws xob yuav yooj yim dua thiab tswj tau ntau dua li kev ntxiv lub cev attenuator hauv txoj kev.
Cov lus nug nquag
Dab tsi yog qhov txawv ntawm qhov ruaj khov thiab hloov pauv fiber ntau optic attenuator?
Lub attenuator ruaj khov muab ib tus nqi qis qis (piv txwv li, 3 dB, 5 dB, lossis 10 dB) thiab tsis tuaj yeem hloov kho. Ib qho kev sib txawv ntawm qhov muag pom qhov muag (VOA) tso cai rau koj hu rau hauv ntau theem attenuation sib txawv ntawm qhov txuas mus tas li. Tsau attenuators yog siv rau kev teeb tsa mus tas li nrog cov qib hluav taws xob paub; VOAs yog qhov zoo dua rau kev sim, ntsuas qhov siv tau, thiab cov xwm txheej uas tus nqi qis qis yuav tsum tau ua tiav.
Kuv yuav paub pes tsawg dB kuv lub attenuator yuav tsum yog?
Xam koj cov peev nyiaj txuas. Nrhiav lub transmitter tso zis hwj chim thiab receiver siab tshaj plaws input hwj chim los ntawm lub transceiver datasheet, kwv yees tag nrho cov link poob, thiab txiav txim seb lub hwj chim tau txais tshaj lub receiver lub overload theem. Tus nqi attenuator yuav tsum txo tau txais lub hwj chim rau hauv lub receiver qhov kev nyab xeeb nrog 1-3 dB ntawm cov npoo.
Kuv puas tuaj yeem siv ib qho -mode attenuator ntawm qhov txuas multimode?
Tsis yog. Ib leeg-mode thiab multimode attenuators txawv ntawm qhov loj me, cov lej aperture, thiab kev ua haujlwm wavelength. Ib qho -hom attenuator tsim rau 9/125 μm fiber ntau ntawm 1310 nm yuav tsis tsim kom raug attenuation ntawm 50/125 μm multimode txuas ntawm 850 nm. Ib txwm phim lub attenuator rau hom fiber ntau thiab wavelength siv hauv qhov txuas.
Nws puas muaj kev nyab xeeb rau kev sib koom nrog UPC attenuator nrog APC chaw nres nkoj?
Tsis yog. UPC thiab APC endfaces yog lub cev tsis sib xws. UPC connectors muaj lub tiaj tus - vojvoog polish; APC connectors muaj 8-degree kaum sab xis. Mating lawv ua ke ua rau muaj kev nkag siab siab, rov qab poob qis, thiab tuaj yeem ua rau ob qho tib si txuas txuas mus tas li. Ib txwm phim UPC rau
UPC thiab APC rau APC.
Dab tsi yog hom connector muaj rau fiber ntau optic attenuators?
Attenuators yog tsim rau txhua hom fiber ntau optic connector, suav nrog LC, SC, FC, thiab ST. LC attenuators yog feem ntau nyob rau hauv tam sim no cov ntaub ntawv chaw thiab kev lag luam xa tawm. SC attenuators tau siv dav hauv kev siv xov tooj thiab PON. Txuas lub attenuator txuas rau qhov chaw nres nkoj nws yuav raug ntsia rau hauv.
Puas yog fiber ntau optic attenuators cuam tshuam rov qab poob lossis qhov poob?
Yog lawm. Txhua tus attenuator qhia txog qhov me me ntawm qhov ntxiv qhov poob dhau ntawm nws qhov ntsuas attenuation tus nqi, thiab nws qhov kev poob rov qab yog nyob ntawm tus qauv tsim thiab qhov kawg polish. High -zoo fixed attenuators siv doped-fiber absorption feem ntau ua tau rov qab poob zoo dua −50 dB (UPC) lossis −60 dB (APC). Attenuation raug, rov poob, thiab ib puag ncig kev ruaj ntseg yog them los ntawm cov qauv kev lag luam suav nrog Telcordia GR-910-CORE thiab IEC 61300-3-4.
Kuv yuav tsum nruab lub attenuator qhov twg hauv qhov txuas?
Feem ntau, lub attenuator tau teeb tsa ntawm lossis ze ntawm tus txais qhov kawg ntawm qhov txuas - txawm tias txuas ncaj qha rau hauv qhov chaw txais khoom lossis muab tso rau hauv thaj chaw ze tshaj plaws rau tus txais. Qhov no ua kom lub teeb liab raug txo ua ntej nws mus txog lub photodetector. Muab lub attenuator rau ntawm qhov kawg transmitter ua tiav tib yam net attenuation, tab sis receiver -side placement yog qhov kev coj ua ntau dua.
Kuv puas tuaj yeem tso ntau lub attenuator kom ncav cuag tus nqi siab dua dB?
Technically, yog - ob 5 dB attenuators hauv series muab kwv yees li 10 dB ntawm tag nrho cov attenuation. Txawm li cas los xij, txhua tus khub txuas ntxiv ntxiv qhov poob qis thiab qhov muaj peev xwm xav txog qhov taw tes. Thaum ua tau, siv ib qho attenuator nrog tus nqi raug es tsis txhob stacking ntau chav nyob. Yog tias tsis muaj qhov tseem ceeb, stacking tau txais raws li kev ntsuas ib ntus, tab sis nws tsis zoo rau kev teeb tsa mus tas li.
Cov ntsiab lus
Fiber optic attenuators yog cov khoom ncaj nraim, tab sis xaiv qhov tsim nyog yuav tsum tau ua tib zoo saib rau ntau qhov tsis dhau ntawm tus nqi dB xwb. Sib phim hom fiber ntau, connector, polish, thiab wavelength rau qhov txuas. Base tus nqi attenuation ntawm ib qhov txuas kev suav nyiaj txiag, tsis yog kwv yees. Siv lub attenuator sib txawv thaum kuaj yog tias tus nqi xav tau tsis paub meej, tom qab ntawd xa ib chav nyob ruaj khov rau kev tsim khoom. Thiab thaum tsis ntseeg, ntsuas tau txais lub zog nrog lub ntsuas hluav taws xob kho qhov muag ua ntej thiab tom qab txhim kho lub attenuator - ib kauj ruam pov thawj no tshem tawm cov kev xaiv feem ntau.
Yog tias koj tab tom nrhiav fiber ntau optic attenuators lossis lwm yam passive Cheebtsam, tshawb xyuas peb cov ntau yam ntawmfiber ntau optic connectors, adapters, thiabpatch kablos xyuas kom meej compatibility thoob koj installation.
