The Study of the Properties of Optical Fiber Made Of Doped Silica

Abstract

This study aims at designing optic fibers out of the doped silica and studying the properties of the manufactured optic fibers and employing them in different practical processes . Three types of doped silica will be chosen : (13.5 m / 0 GeO2, 86.5 m / 0 SiO2) ( 9.1 m / 0 GeO2,7.7m/0B2O3, 83.2 m / 0 SiO2)( 4.03 m / 0 GeO2, 9.7m/0B2O3, 86.27m / 0 SiO2) By using sellmeire equation the refraction index will be calculated for the materials used in manufacturing optic fibers. The study shows that the materials (13.5 m / 0 GeO2, 86.5 m / 0 SiO2) has the highest index of refraction among the other materials by using special equation, the properties of optic fibers has been examined ( the numerical aperture , the critical angle ,…) as a function of wave length. The result shows that the core optic fiber has the doped silica (13.5 m / 0 GeO2, 86.5 m / 0 SiO2) while the clad has the material (9.1 m / 0 GeO2,7.7m/0B2O3, 83.2 m / 0 SiO2) this should be of suitable properties to act as a receiving fiber. The fiber of the core materials (13.5 m / 0 GeO2, 86.5 m / 0 SiO2) while the glade has the materials (4.03 m / 0 GeO2, 9.7m/0B2O3, 86.27m / 0 SiO2) have properties which enabled it to act as a sending fiber with various wave length.