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SOLVED: The Fresnel reflection coefficient, r, at a fiber core of refractive index ni is given approximately by:r = (ni - n) / (ni n)where n is the refractive index of the surrounding medium. A silica multimode step index fiber has a core refractive index of 1.46.(i) Determine the optical loss in decibels due to Fresnel reflection at a fiber joint with a small air gap. [4 marks](ii) Calculate the percentage reduction in optical loss due to Fresnel reflection when an index matching epoxy with a
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