Question 4A fiber optic communication system use a multimode graded-index fiber with a core refractiveindex of 1.495 and a cladding refractive index of 1.475. The fiber has a length of 50 km, coreradius of 62 um, a loss factor of 0.3 dB/km and operate at a wavelength of 1.58 um.(i) Explain the condition for which the light wave will propagate and get trapped inside thefiber core.(ii) Calculate the critical propagation angle.(iii) Calculate the number of guided modes propagating in the fiber.(iv) Determine the coupling efficiency of the fiber.(v) Evaluate the core radius that allows only 40 guided modes propagating in the fiber.Maximum size for new files 500MB19 1366 x 768px

For the light to remain trapped within the optical fiber, the angle it has to make with the core of…

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