Qhov kev pab cuam tsab ntawv yuav tsum tau txhais cov refractive index faib nqi. Los ntawm ob peb kab ntawm cov kev pab cuam code, tus nqi refractive index yog nyeem nyob rau hauv lem, thiab lub refractive index function n_f (R) graph yog kos los ntawm interpolation.
Cov hauv qab no yog cov duab kos ntawm fiber ntau yam ntxwv tom qab qhov kev pab cuam khiav:
Fig. 1 yog ib daim duab radial muaj nuj nqi, thiab cov xim sib txawv ntawm qhov sib txawv ι Tus nqi. Nyob rau hauv daim duab, lub refractive index faib thiab qhov zoo refractive index ntawm hom kuj pom.
Daim duab 2 qhia txog kev siv zog faib qauv ntawm hom xaiv
Daim duab 3 yog ib daim duab ntawm tus naj npawb ntawm cov qauv piv rau wavelength. Ntawm lub wavelength ntawm 1.96 um, tsuas muaj ib hom nkaus xwb.
Daim duab 4 qhia tau hais tias qhov ua tau zoo refractive index muaj feem xyuam rau lub wavelength. Thaum lub refractive index nce mus rau lub refractive index ntawm cladding, tus coj cutoff wavelength yog.
Daim duab 5 qhia tau hais tias lub hwj chim sib raug rau txhua hom thiab wavelengths hauv cov tub ntxhais.
