Question

A step index finre has a numerical aperture of 0.26, core refractive index of 1.5 and a core diameter of 100 micrometer. Calculate the refractive index of cladding​

Answer 1

Answer:

please refer to the attachment

Explanation:

hope it helps;

Answer 2

Answer:

The acceptance angle of an optical fiber is defined based on a purely geometrical consideration (ray optics): it is the maximum angle of a ray (against the fiber axis) hitting the fiber core which allows the incident light to be guided by the core. The sine of that acceptable angle (assuming an incident ray in air or vacuum) is called the numerical aperture, and it is essentially determined by the refractive index contrast between core and cladding of the fiber, assuming that the incident beam comes from air or vacuum:

sin i= numerical aperture/ n sin i

         = 15.07 degrees

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