Lub teeb uas peb paub zoo tshaj plaws yog qhov kaj uas peb pom tau ntawm qhov muag liab qab.Peb ob lub qhov muag yog rhiab heev rau lub teeb liab nrog lub wavelength ntawm 400nm rau lub teeb liab ntawm 700nm.Tab sis rau cov fibers optical uas nqa iav fibers, peb siv lub teeb nyob rau hauv cheeb tsam infrared.Cov teeb no muaj qhov ntev wavelengths, tsis tshua muaj kev puas tsuaj rau cov fibers optical, thiab tsis pom ntawm qhov muag liab qab.Kab lus no yuav muab cov lus piav qhia ntxaws ntxaws ntawm lub wavelength ntawm cov fiber ntau optical thiab vim li cas koj yuav tsum xaiv cov wavelengths no.
Kev txhais ntawm wavelength
Qhov tseeb, lub teeb yog txhais los ntawm nws lub wavelength.Wavelength yog tus lej sawv cev rau lub spectrum ntawm lub teeb.Qhov zaus, lossis xim, ntawm txhua lub teeb muaj lub wavelength cuam tshuam nrog nws.Wavelength thiab zaus muaj feem xyuam.Feem ntau hais lus, luv-yoj hluav taws xob raug txheeb xyuas los ntawm nws lub wavelength, thaum lub suab ntev-yoj raug txheeb xyuas los ntawm nws qhov zaus.
Feem ntau wavelengths nyob rau hauv optical fibers
Cov wavelength feem ntau yog 800 txog 1600nm, tab sis tam sim no, feem ntau siv wavelengths hauv optical fibers yog 850nm, 1300nm thiab 1550nm.Multimode fiber ntau yog tsim rau wavelengths ntawm 850nm thiab 1300nm, thaum ib hom fiber ntau yog qhov zoo tshaj plaws siv rau wavelengths ntawm 1310nm thiab 1550nm.Qhov sib txawv ntawm lub wavelength ntawm 1300nm thiab 1310nm tsuas yog nyob rau hauv lub npe kev cai.Lasers thiab lub teeb-emitting diodes kuj siv rau lub teeb propagation nyob rau hauv optical fibers.Lasers ntev dua li ib hom khoom siv nrog wavelengths ntawm 1310nm lossis 1550nm, thaum lub teeb-emitting diodes yog siv rau ntau hom khoom siv nrog wavelengths ntawm 850nm lossis 1300nm.
Vim li cas thiaj xaiv cov wavelengths no?
Raws li tau hais ua ntej, feem ntau siv wavelengths hauv optical fibers yog 850nm, 1300nm thiab 1550nm.Tab sis vim li cas peb xaiv peb lub teeb ntawm lub teeb no?Nws yog vim hais tias cov teeb liab kho qhov muag ntawm peb lub wavelengths no muaj qhov poob tsawg tshaj plaws thaum kis tau rau hauv fiber ntau optical.Yog li ntawd lawv yog qhov tsim nyog tshaj plaws raws li muaj cov teeb pom kev zoo rau kev sib kis hauv cov fibers.Qhov poob ntawm cov iav fiber ntau yog los ntawm ob yam: absorption poob thiab Kev poob poob.Absorption poob feem ntau tshwm sim ntawm ob peb lub wavelengths tshwj xeeb uas peb hu ua "dej bands", feem ntau yog vim qhov nqus dej hauv cov khoom siv iav.Qhov tawg yog feem ntau tshwm sim los ntawm kev rov qab ntawm atoms thiab molecules ntawm lub khob.Ntev nthwv dej tawg yog me me, qhov no yog lub luag haujlwm tseem ceeb ntawm wavelength.
Hauv kev xaus
Tom qab nyeem tsab xov xwm no, koj yuav muaj qee qhov kev nkag siab yooj yim ntawm cov wavelengths siv nyob rau hauv optical fibers.Vim tias lub wavelength poob ntawm 850nm, 1300nm thiab 1550nm yog qhov qis, lawv yog qhov kev xaiv zoo tshaj plaws rau kev sib txuas lus fiber ntau.
Post lub sij hawm: Jan-20-2021 
