A cikin hanyoyin sadarwa na PON (Passive Optical Network), musamman a cikin hadaddun ma'ana-zuwa-multipoint PON ODN (Network Distribution Network) topologies, saurin sa ido da gano kuskuren fiber suna gabatar da ƙalubale masu mahimmanci. Ko da yake na gani lokaci yankin reflectometers (OTDRs) ana amfani da ko'ina kayan aikin, wani lokacin su rasa isasshen hankali ga gano attenuation sigina a ODN reshe zaruruwa ko a ONU fiber iyakar. Shigar da rahusa mai rahusa-zaɓin fiber mai nuni a gefen ONU al'ada ce ta gama gari wacce ke ba da damar ma'auni na madaidaicin ƙarshen-zuwa-ƙarshe na hanyoyin haɗin gani.
Fiber reflector yana aiki ta amfani da grating fiber na gani don nuna bugun bugun OTDR na baya tare da kusan 100%. A halin yanzu, matsakaicin tsayin aiki na yau da kullun na tsarin hanyar sadarwa na gani (PON) yana wucewa ta cikin mai tunani tare da ɗan ƙaranci saboda baya gamsar da yanayin Bragg na fiber grating. Babban aikin wannan hanyar shine a ƙididdige ƙimar asarar dawowar kowane reshe na ONU ta hanyar ganowa da kuma ƙarfin siginar gwajin OTDR. Wannan yana ba da damar tantance ko hanyar haɗin gani tsakanin bangarorin OLT da ONU tana aiki kullum. Sakamakon haka, yana samun sa ido na ainihin lokacin abubuwan kuskure da sauri, ingantaccen bincike.
Ta hanyar sassauƙa tura masu nuni don gano ɓangarori daban-daban na ODN, saurin ganowa, gano wuri, da tushen bincike na kurakuran ODN za a iya cimma, rage lokacin ƙudurin kuskure yayin haɓaka ingantaccen gwaji da ingancin kula da layi. A cikin yanayin tsaga na farko, masu nunin fiber da aka sanya a gefen ONU suna nuna al'amura lokacin da reshe na reshe ya nuna hasarar dawowa sosai idan aka kwatanta da ingantaccen tushen sa. Idan duk rassan fiber sanye take da masu nuni a lokaci guda suna nuna hasarar dawowa, yana nuna kuskure a cikin babban fiber na gangar jikin.
A cikin yanayin tsaga na biyu, ana iya kwatanta bambance-bambancen asara na dawowa don nuna daidai ko kuskuren raguwa ya faru a cikin ɓangaren fiber rarraba ko ɓangaren fiber ɗin. Ko a cikin yanayin rarrabuwar kawuna na farko ko na sakandare, saboda faɗuwar ƙwanƙwasa kololuwar tunani a ƙarshen madaidaicin gwajin OTDR, ƙimar asarar dawowar hanyar haɗin reshe mafi tsayi a cikin hanyar sadarwar ODN maiyuwa ba za a iya aunawa daidai ba. Don haka, dole ne a auna sauye-sauye a matakin tunani a matsayin tushen ma'aunin kuskure da ganewar asali.
Hakanan za'a iya tura filayen fiber na gani a wuraren da ake buƙata. Misali, shigar da FBG kafin Fiber-to-the-Home (FTTH) ko Fiber-to-the-Building (FTTB) wuraren shigarwa, sannan gwadawa tare da OTDR, yana ba da damar kwatanta bayanan gwaji da bayanan tushe don gano kuskuren cikin gida / waje ko ginin ciki / waje.
Fiber optic reflectors za a iya sanya su cikin dacewa a jeri a ƙarshen mai amfani. Tsawon rayuwarsu, kwanciyar hankali da aminci, ƙarancin yanayin zafin jiki, da sauƙin tsarin haɗin adaftar suna daga cikin dalilan da suke zama kyakkyawan zaɓi na ƙarshen gani don sa ido kan hanyar haɗin yanar gizo na FTTx. Yiyuantong yana ba da firikwensin fiber optic na FBG a cikin nau'ikan marufi daban-daban, gami da hannayen firam ɗin filastik, hannayen firam ɗin ƙarfe, da nau'ikan pigtail tare da masu haɗin SC ko LC.
Lokacin aikawa: Satumba-11-2025