Hauv PON (Passive Optical Network) tes hauj lwm, tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus nyuaj-rau-multipoint PON ODN (Optical Distribution Network) topologies, kev saib xyuas sai thiab kev kuaj mob ntawm cov fiber faults nthuav tawm cov teeb meem tseem ceeb. Txawm hais tias optical time domain reflectometers (OTDRs) yog cov cuab yeej siv dav dav, lawv qee zaum tsis muaj kev nkag siab txaus rau kev ntes cov teeb liab attenuation hauv ODN ceg fibers lossis ntawm ONU fiber kawg. Kev txhim kho tus nqi qis wavelength-selective fiber reflector ntawm ONU sab yog ib qho kev coj ua uas ua rau muaj kev ntsuas qhov kawg-rau-kawg attenuation ntawm cov kev sib txuas optical.
Lub tshuab fiber reflector ua haujlwm los ntawm kev siv lub tshuab fiber ntau optical grating los cuam tshuam lub zog ntawm OTDR rov qab nrog ze li ntawm 100% kev cuam tshuam. Lub caij no, qhov ntev ntawm lub zog ua haujlwm ib txwm ntawm lub network optical network (PON) system hla dhau lub tshuab reflector nrog qhov tsawg kawg nkaus attenuation vim nws tsis txaus siab rau lub zog bragg ntawm lub fiber grating. Lub luag haujlwm tseem ceeb ntawm txoj hauv kev no yog los xam qhov tseeb ntawm qhov poob rov qab ntawm txhua qhov kev cuam tshuam ntawm ONU ceg los ntawm kev kuaj pom qhov muaj thiab qhov muaj zog ntawm lub teeb liab OTDR. Qhov no ua rau kev txiav txim siab seb qhov txuas optical ntawm OLT thiab ONU sab puas ua haujlwm ib txwm. Yog li ntawd, nws ua tiav kev saib xyuas lub sijhawm tiag tiag ntawm cov ntsiab lus txhaum thiab kev kuaj mob sai thiab raug.
Los ntawm kev siv cov reflectors kom yooj yim los txheeb xyuas cov ntu ODN sib txawv, kev tshawb pom sai, kev teeb tsa hauv zos, thiab kev tshuaj xyuas qhov ua rau ODN tsis ua haujlwm tuaj yeem ua tiav, txo lub sijhawm daws teeb meem thaum txhim kho kev ua haujlwm ntawm kev sim thiab kev saib xyuas kab zoo. Hauv qhov xwm txheej splitter thawj zaug, cov reflectors fiber ntsia rau ntawm ONU sab qhia txog teeb meem thaum tus ceg ntawm tus reflector qhia txog kev poob rov qab ntau dua piv rau nws qhov kev noj qab haus huv. Yog tias txhua ceg fiber uas muaj cov reflectors tib lub sijhawm qhia txog kev poob rov qab, nws qhia txog qhov txhaum hauv lub cev fiber tseem ceeb.
Hauv qhov xwm txheej cais theem ob, qhov sib txawv ntawm kev poob rov qab kuj tuaj yeem piv rau qhov tseeb tias qhov ua yuam kev attenuation tshwm sim hauv qhov faib fiber lossis qhov poob fiber ntu. Txawm hais tias nyob rau hauv thawj lossis theem ob qhov xwm txheej faib, vim yog qhov poob qis ntawm qhov rov qab los ntawm qhov kawg ntawm qhov nkhaus xeem OTDR, qhov poob rov qab los ntawm qhov txuas ceg ntev tshaj plaws hauv ODN network yuav tsis ntsuas tau meej. Yog li ntawd, kev hloov pauv ntawm qib kev cuam tshuam ntawm tus neeg cuam tshuam yuav tsum tau ntsuas ua lub hauv paus rau kev ntsuas qhov txhaum thiab kev kuaj mob.
Cov khoom siv fiber optic kuj tseem tuaj yeem siv tau rau ntawm qhov chaw xav tau. Piv txwv li, kev teeb tsa FBG ua ntej Fiber-to-the-Home (FTTH) lossis Fiber-to-the-Building (FTTB) nkag mus, tom qab ntawd sim nrog OTDR, tso cai rau kev sib piv cov ntaub ntawv xeem piv rau cov ntaub ntawv pib los txheeb xyuas cov teeb meem fiber sab hauv tsev/sab nraum zoov lossis lub tsev sab hauv/sab nraud.
Cov fiber optic reflectors tuaj yeem muab tso ua ke rau ntawm tus neeg siv. Lawv lub neej ntev, kev ntseeg siab ruaj khov, qhov kub tsawg kawg nkaus, thiab cov qauv txuas adapter yooj yim yog cov laj thawj uas lawv yog qhov kev xaiv zoo tshaj plaws rau kev saib xyuas FTTx network txuas. Yiyuantong muab cov FBG fiber optic reflectors hauv ntau hom ntim khoom, suav nrog cov tes tsho yas, cov tes tsho hlau, thiab cov ntaub ntawv pigtail nrog SC lossis LC connectors.
Lub sijhawm tshaj tawm: Cuaj hlis-11-2025