Kab lus no muab kev tshawb nrhiav hauv -qhov tob ntawm lub luag haujlwm tseem ceeb ntawm EDFA hauv CATV FTTH tes hauj lwm- txhim kho lub teeb liab hluav taws xob kom ua tiav qhov ntev - kis tau tus mob nyob deb - thiab qhia txog yuav ua li cas kev sib koom ua ke CATV + SAT IF receivers nrog advanced AGC, CWDM, thiab ultraise tsis muaj kev ua haujlwm zoo li qub.
Hauv kev tsim kom muaj txiaj ntsig zoo, ruaj khov CATV (Cable TV) FTTH (Fiber-rau--Tsev) tes hauj lwm muaj peev xwm txhawb nqa cov ntaub ntawv loj thiab siab-txhais video xa mus, optical amplifiers ua lub luag haujlwm tseem ceeb. Ntawm lawv, EDFA (Erbium-Doped Fiber Amplifier) yog ib qho tseem ceeb tshaj plaws optical amplification li. Yog li, dab tsi yog lub hom phiaj tseem ceeb ntawm EDFA hauv CATV FTTH tes hauj lwm, thiab nws koom tes nrog - tiam tom ntej cov khoom siv? Kab lus no muab cov ncauj lus kom ntxaws.
SAT-TERR OVER FIBER
Core Function ntawm EDFA hauv CATV FTTH Networks: Optical Signal Relay thiab Amplification
Cias muab tso, lub hom phiaj tseem ceeb ntawm EDFA yog kom ncaj qha amplify optical signals, them nyiaj rau kev poob thaum lub sij hawm xa xov fiber ntau thiab txuas ntxiv teeb liab mus txog.
Hauv FTTH network, cov teeb liab kho qhov muag raug xa los ntawm tus neeg teb xov tooj lub taub hau thiab yuav tsum taug kev deb kom ncav cuag cov neeg siv lub tsev. Txawm hais tias fiber ntau optics inherently pom qhov poob qis, optical zog inevitably attenuates nyob deb. Thaum lub teeb liab tsis muaj zog dhau ntawm ib qho taw tes, nws tsis tuaj yeem txheeb xyuas qhov tseeb los ntawm tus neeg siv -sab receiver, ua rau muaj teeb meem cuam tshuam lossis kev puas tsuaj loj heev.
Ib qho EDFA ua zoo li "chaw nres tsheb refueling" raws cov kab fiber ntau optic. Nws amplifies optical signals ncaj qha yam tsis hloov lawv mus rau hauv hluav taws xob teeb liab, muab nws unparalleled zoo:
Siab tso zis zog: Muaj peev xwm amplifying ntau lub wavelengths ib txhij, txhawb cov neeg siv ntau.
Transparent Transmission: Hom ntawv- thiab tus nqi- tsis pom kev, ua kom muaj kev sib raug zoo.
Tsawg suab nrov: Cov suab nrov zoo ua haujlwm tswj cov teeb liab zoo.
Los ntawm kev siv EDFAs nyob rau hauv lub cev lub cev, cov neeg ua haujlwm tuaj yeem tsim CATV tes hauj lwm npog kaum lossis ntau pua mais yam tsis muaj kev txhawj xeeb txog kev txo qis.
Tshaj li EDFA: Cov Kev Sib Tw ntawm Network Ntug thiab Cov Ntsiab Lus daws teeb meem -High-Kev Ua Tau Zoo
Thaum EDFA hais txog kev sib tw hauv lub cev, lub teeb liab yuav tsis muaj zog dua vim yog kev faib tawm thiab kev sib kis ntxiv los ntawm lub sijhawm nws mus txog cov neeg siv cov ntsiab lus nkag (xws li, tsev lossis tsev), thiab nws yuav muaj suab nrov los ntawm EDFA. Nyob rau theem no, lub siab -kev ua tau zoo FTTH receiver yog qhov tseem ceeb rau siab - cov teeb liab tau txais txiaj ntsig zoo thiab hloov pauv hauv " mais kawg."
Qhov no yog qhov kev sib koom ua ke AGC CATV + SAT YOG RECEIVER (Tsis Siv Neeg Gain Control CATV thiab Satellite IF Receiver) nrog cov thev naus laus zis siab heev los ua si. Lub receiver uas tsim los rau niaj hnub triple - cov kev pabcuam ua si, xws li ib qho uas muaj cov yam ntxwv hauv qab no, yog qhov tseem ceeb los xyuas kom meej qhov kawg - cov neeg siv kev paub:
Kev them nyiaj yug Broadband (45-2150 MHz): Txhawb nqa tag nrho CATV RF signals thiab satellite IF (SAT IF) cov teeb liab, ua tau raws li kev xav tau ntau yam kev pabcuam.
Ua-Hauv Optical AGC: Qhov no ua haujlwm raws li "kev pov hwm ntse" tiv thaiv kev hloov pauv ntawm lub zog kho qhov muag. Thaum cov khoom siv hluav taws xob kho qhov muag sib txawv vim qhov kev hloov pauv ntawm ib puag ncig los yog qhov sib txuas me me, AGC (Automatic Gain Control) tau hloov kho cov zis theem thiab nce kom ruaj khov thiab txhim khu kev qha teeb liab tso tawm yam tsis muaj kev cuam tshuam, txo cov nqi ua haujlwm.
Ultra-Tsawg Noise Technology: Siv cov khoom siv siab tshaj plaws xws li GaAs amplifiers kom txo qis suab nrov, txhim kho Cov Neeg Siv Khoom - rau -Noise Ratio (CNR), thiab tshwj xeeb tshaj yog txhim kho kev ua tau zoo ntawm cov teeb liab nthuav dav los ntawm EDFA, xa cov yeeb yaj kiab zoo dua.
Zoo heev linearity thiab flatness: Ua kom muaj kev cuam tshuam zoo, ua kom lub zog tsis sib xws ntawm txhua txoj hauv kev, thiab tiv thaiv cov teeb meem xws li pixelation lossis cuam tshuam hauv qee cov channel.
High-Linearity Photodetector (PD) + Ua tau -In CWDM: Siv CWDM (Coarse Wavelength Division Multiplexing) thev naus laus zis, nws tuaj yeem tau txais cov teeb liab los ntawm qhov sib txawv wavelengths (piv txwv li, 1550 nm CATV signals thiab 1490 nm / 1310 nm cov ntaub ntawv teeb liab) thiab ua tau zoo -zoo kho qhov muag- mus rau - hluav taws xob hloov dua siab tshiab 8} los ntawm ib qho chaw siab ua.
High Return Poob thiab Ib Leeg -Fiber Application: Ua haujlwm dhau ib qho -core ib leeg- hom fiber ntau nrog kev rov qab poob siab, txo kev cuam tshuam los ntawm cov teeb liab cuam tshuam thiab ua kom muaj kev ruaj ntseg txuas.
Synergy ntawm EDFA thiab Intelligent Receivers
Hauv cov ntsiab lus, lub hom phiaj tseem ceeb ntawm EDFA hauvCATV FTTHkev tes hauj lwm yog los pab kom tej thaj chaw deb, ua tau zoo, thiab siab - muaj peev xwm relay kis tau tus mob optical signals, ua lub hauv paus rau kev tsim network dav. Ntawm lub network ntug, ib qho kev sib koom ua ke CATV + SAT IF receiver featuring optical AGC, ultra- tsis tshua muaj suab nrov, CWDM, thiab lwm yam thev naus laus zis ua raws li tus neeg saib xyuas zaum kawg kom ntseeg tau siab - teeb liab xa mus rau cov neeg siv khoom. Ua ke, lawv tsim cov pob txha ntawm niaj hnub siab - nrawm, ruaj khov, thiab txhim khu kev qha fiber ntau- optic broadband thiab video pabcuam network.
Rau cov neeg ua haujlwm hauv network thiab cov chaw tsim khoom, xaiv lub siab - kev ua haujlwm tau zoo nrog cov yam ntxwv saum toj no yog qhov kev txiav txim siab zoo rau kev ua kom zoo tshaj plaws hauv lub network, txhim kho cov neeg siv kev txaus siab, thiab txo cov nqi ua haujlwm tag nrho.
