Vim li cas thiaj siv otdr?

Cov txheej txheem:

Vim li cas thiaj siv otdr?
Vim li cas thiaj siv otdr?
Anonim

Lub Sijhawm Optical Domain Reflectometer (OTDR) yog siv tau rau kev kuaj kev ncaj ncees ntawm fiber ntau optic cables. Nws tuaj yeem txheeb xyuas qhov poob, ntsuas qhov ntev thiab nrhiav qhov tsis raug. Lub OTDR kuj tseem siv los tsim "daim duab" ntawm fiber ntau optic cable thaum nws tau nruab tshiab.

OTDR ua haujlwm li cas?

Lub laser emits ib pulse ntawm lub teeb ntawmib lub wavelength tshwj xeeb, lub mem tes ntawm lub teeb no taug kev raws cov fiber ntau tau sim, raws li cov mem tes txav mus rau hauv fiber ntau ntawm lub teeb kis yog reflected / refracted los yog tawg rov qab rau hauv fiber ntau rau cov duab ntes hauv OTDR.

OTDR yog dab tsi hauv kev sib txuas lus fiber ntau?

Ib lub sij hawm-domain reflectometer (OTDR) yog ib qho khoom siv optoelectronic siv los ua tus yam ntxwv ntawm fiber ntau optical. … Nws txhaj cov tshuaj kho qhov muag mus rau hauv cov fiber ntau hauv kev sim thiab rho tawm, los ntawm tib qhov kawg ntawm cov fiber ntau, lub teeb uas tawg (Rayleigh backscatter) lossis rov qab los ntawm cov ntsiab lus raws cov fiber ntau.

OTDR xam qhov deb li cas?

Ib OTDR siv cov fiber ntau "index of refraction" (IOR) tus nqilos xam qhov nrug. Qhov no yog muab los ntawm cov tuam txhab fiber ntau thiab nkag mus rau hauv qhov chaw ntawm koj OTDR. Nrog rau tus nqi IOR txoj cai, koj yuav tau txais daim ntawv qhia txog qhov ntev ntawm fiber ntau thiab qhov kev ncua deb mus rau 'cov xwm txheej' xws li cov khoom sib txuas, so, thiab lwm yam.

OTDR yog dab tsi?

Piv txwv li, ib hom OTDR nrog ntau yam dynamic ntawm 35 dBmuaj qhov siv tau ntau yam ntawm kwv yees li 30 dB. Piv txwv li cov fiber ntau attenuation ntawm 0.20 dB / km ntawm 1550 nm thiab splices txhua 2 km (poob ntawm 0.1 dB ib splice), ib chav tsev xws li qhov no yuav muaj peev xwm ua kom raug kev ncua deb txog li 120 km.

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