Kev piav qhia: hauv multimode gradded index propogation cov tub ntxhais yog qhov sib txawv ntawm qhov sib txawv.
Nyob rau hauv hom twg ntawm kev nthuav tawm qhov ceev ntawm cov tub ntxhais yog siab tshaj ntawm Lub Chaw thiab txo qis kom nws qis tshaj ntawm ntug?
Ib qib-index fiber, yog li ntawd, yog ib qho uas muaj qhov sib txawv. Qhov ceev tau yog qhov siab tshaj plaws ntawm qhov chaw ntawm cov tub ntxhais thiab txo qis qis rau nws qis tshaj ntawm ntug. Single Mode: Ib hom siv cov kauj ruam-index fiber ntau thiab lub teeb pom kev zoo uas txwv cov kab teeb rau ib qho me me ntawm cov ces kaum, tag nrho ze rau kab rov tav.
Yuav ua li cas hom fiber ntau optical cables qhov ceev ntawm cov tub ntxhais fiber ntau txawv?
Multimode graded-index fiber ntau txo qis qhov cuam tshuam ntawm lub teeb liab los ntawm kab. Nws yog nrog ntau qhov sib txawv. Qhov ceev yog qhov siab tshaj plaws ntawm qhov nruab nrab ntawm qhov tseem ceeb thiab txo qis mus rau qhov qis tshaj ntawm ntug.
Qhov twg yog qhov tseem ceeb los yog cladding?
Nyob rau hauv ib qho fiber ntau optical, lub core yog ib txwm tsawg dua li cov cladding.
Qhov kev tawg yog tshwm sim los ntawm qhov sib txawv ntawm lub sijhawm nthuav tawm ntawm lub teeb rays uas coj txoj kev sib txawv ntawm cov fiber ntau?
Ob hom kev sib cais hauv qab no tuaj yeem cuam tshuam rau qhov sib txuas ntawm cov ntaub ntawv kho qhov muag: Chromatic dispersion-Kev sib kis ntawm lub teeb liab dhau lub sij hawm uas tshwm sim los ntawm qhov sib txawv ceev ntawm lub teeb rays. Modal dispersion-Kev sib kis ntawm lub teeb liab dhau lub sijhawm tshwm simlos ntawm ntau hom kev nthuav tawm hauv fiber ntau.
