Two joined graded index fibers that are perfectly aligned have refractive indices αR = 1.93 for receiving fiber αE = 2.15 for emitting fiber. Calculate the coupling loss.

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Two joined graded index fibers that are perfectly aligned have refractive indices α<sub>R</sub> = 1.93 for receiving fiber α<sub>E</sub> = 2.15 for emitting fiber. Calculate the coupling loss.