OFDROpticalFyam xav tauDomainReflectometer
Lub vev xaib ntsuas qhov muag tau kho qhov muag ntawm OFDR yog qhov kev txiav txim siab high-optical optical fiber technology uas tau maj mam tsim tawm xyoo 1990. Txawv sib txawv los ntawm cov kho qhov muag lub sij hawm tus pas ntsuas kub OTDR kis mus rau hauv qhov system yog teeb liab mem tes hauv lub sijhawm sau npe. OFDR kis tau mus rau hauv qhov system los ntawm kev siv lub koob yees duab nqaim thiab siv lub tshuab hluav taws xob acousto-optic tsim los tsim cov teeb meem swept kho qhov muag, thiab tom qab ntawd dhau cov cim kho qhov muag pom heterodyne thev naus laus zis. Qhov tshwj xeeb algorithm los tshuaj xyuas cov teeb liab kuaj pom. Tsis hais tus qauv lossis algorithm, OFDR yog qhov nyuaj ntau dua li OTDR.
Taw qhia rau OFDR
Lub vev xaib ntsuas qhov muag tau kho qhov muag ntawm OFDR yog qhov kev txiav txim siab high-optical optical fiber technology uas tau maj mam tsim tawm xyoo 1990. Txawv sib txawv los ntawm cov kho qhov muag lub sij hawm tus pas ntsuas kub OTDR kis mus rau hauv qhov system yog teeb liab mem tes hauv lub sijhawm sau npe. OFDR kis tau mus rau hauv qhov system los ntawm kev siv lub koob yees duab nqaim thiab siv lub tshuab hluav taws xob acousto-optic tsim los tsim cov teeb meem swept kho qhov muag, thiab tom qab ntawd dhau cov cim kho qhov muag pom heterodyne thev naus laus zis. Qhov tshwj xeeb algorithm los tshuaj xyuas cov teeb liab kuaj pom. Tsis hais tus qauv lossis algorithm, OFDR yog qhov nyuaj ntau dua li OTDR.
OFDR piv nrog OTDR
Piv nrog rau qhov paub zoo ntawm OTDR, hom OFDR muaj qhov kev cuam tshuam ntau dua nyob rau hauv ib puag ncig ib puag ncig. Hauv tib qhov muaj ntau yam, qhov xav tau ntawm lub teeb ci hluav taws xob pom muaj lub zog me dua, uas tuaj yeem kov yeej qhov kev daws teeb meem thiab teeb liab-kom nrov sib npaug zog ntawm OTDR. Kev tsis sib haum xeeb ntawm qhov uas hais txog. Cov daws qhov dav dav ntawm OFDR yog qhov sib xyaw tsis ncaj rau cov bandwidth ntawm qhov tau txais, thiab lub suab nrov yog qhov sib luag rau cov bandwidth ntawm lub txais, yog li lub teeb liab-rau-suab sib piv ntawm OFDR tuaj yeem ua tau siab heev. Thaj chaw tuag rau cov txheej xwm ntsuas kev ntsuas OTDR feem ntau nyob ib ncig ntawm kaum ntawm meters, thaum OFDR tuaj yeem mus txog micrometers. OTDR feem ntau yog siv rau qhov ntev-deb ntawm fiber ntau optic cable network soj ntsuam kom kwv yees qhov kev ua haujlwm engineering yuam kev, thaum OFDR feem ntau siv rau qhov kev ntsuas qhov ntsuas qhov tseem ceeb hauv kev nkag mus rau cov tes hauj lwm thiab kev paub ntawm lub tshuab.
Muaj pes tsawg leeg thiab cov thev naus laus zis ntawm OFDR
Lub thev naus laus zis tseem ceeb ntawm OFDR system feem ntau suav nrog qhov tawm ncaj qha qhov muaj qhov nqaim ntawm qhov ntev ib hom ntev thiab hom tshuab hluav taws xob (feem ntau yog acousto-optic modulator), thiab cov kab ke kho qhov muag uas muaj li ntawm MZ interferometer (suav nrog ib lub coupler , lub ncov qaum kev tswj hwm, thiab lwm yam.) Xav kom txoj kev kho qhov muag pom kev tsis ntev li sai tau), cov kab ke kho qhov muag (cov duab thaij kom zoo), cov ntaub ntawv kis thiab cov teeb meem.
OFDR tsim khoom
OFDR tam sim no yog lub xeev cov khoom lag luam thev naus laus zis, thiab tsuas yog cov khoom lag luam thoob ntiaj teb uas paub zoo yog LUNA (www.lunainc.com) hauv Virginia, Asmeskas. Txawm li cas los xij, lub tuam txhab' s muag txhua xyoo tsawg dua 400 lab nyiaj daus las US, OFDR tsuas yog ib feem me me ntawm LUNA cov khoom lag luam. Nyob rau xyoo 2015, muaj Jiangsu Jingjiang Junlong thiab Shanghai Jiaotong University Dong Yi tus kws qhia ntawv, thiab Nanjing' s Jiangsu Ande Optoelectronics Technology tsim thev naus laus zis thiab cov khoom lag luam. Ua ntej ntawd, AVIC Lub Tsev Kawm Ntawv Lawb Pom Kev kuj tseem muaj kev txhim kho khoom. Lwm qhov yog feem ntau cov khoom sim hauv tsev kawm ntawv thiab cov chaw tshawb fawb.
Kev ua lag luam ntawv zeem muag ntawm OFDR
OFDR tuaj yeem ua lub luag haujlwm tseem ceeb hauv kev tshawb pom qhov txhaum ntawm cov xov tooj hluav taws xob sib koom tes sib txuas, ntsuas qhov ntsuas qhov ntsuas qhov kub thiab lub siab qhov tseeb rau lub chaw ua haujlwm hauv aviation, thiab optical fiber sensing demodulation hauv kev siv kho mob. Daim ntawv thov kev vam meej ntawm cov khoom no vam khom rau kev txhim kho me me, ruaj khov thiab ntau dua qhov siab ntawm cov khoom OFDR.