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A step index fibre has a numerical aperture of 0.16, a core refractive index of 1.45...

A step index fibre has a numerical aperture of 0.16, a core refractive index of 1.45 and a core diameter of 90 mm. Calculate: 1. The refractive index of the cladding. 2. The acceptance angle θm and the confinement angle θ 0 m. 3. The approximate number of modes with a wavelength λ = 0.9 µm that the fibre can carry.

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0 Giren NA 016, coe refachve mdex N45 Claolding rerachre mdex-n 2 ヲ Acephonte anyé co) n(NA) sin-(0-16 ) 9.2 I Comhnemenf an 1. 45 = 83.26un) m 4 ,2 2 Given a- 70 3 58 x lo

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