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Unformatted text preview: illuminated by light from a source. The refractive indices of the core and cladding of the fiber are n1 and n2, respectively, and the refractive index of air is 1 (see figure below). a) Show that the angle a of the cone of rays accepted by the fiber (transmitted through the fiber without undergoing refraction at the cladding) is given by: Numerical Aperture NA = sin a = ( n1 n 2 )
2 2 1/ 2 n2 n1 Air Cladding c c a Core n2 b) Calculate the numerical aperture and acceptance angle for a silica glass fiber with n1 = 1.475 and n2 = 1...
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