Modal Dispersion in Step-Index Fibers. Determine the core radius of a multimode step- index fiber with a numerical aperture NA = 0.1 if the number of modes M = 5000 when the wavelength is 0.87 um. If the core refractive index n = 1.445, the group index N 1.456, and A is approximately independent of wavelength, determine the modal-dispersion response time o, for a 2-km-long fiber.
Modal Dispersion in Step-Index Fibers. Determine the core radius of a multimode step- index fiber with a numerical aperture NA = 0.1 if the number of modes M = 5000 when the wavelength is 0.87 um. If the core refractive index n = 1.445, the group index N 1.456, and A is approximately independent of wavelength, determine the modal-dispersion response time o, for a 2-km-long fiber.
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Transcribed Image Text:9.3-4 Modal Dispersion in Step-Index Fibers. Determine the core radius of a multimode step-
index fiber with a numerical aperture NA = 0.1 if the number of modes M = 5000 when the
wavelength is 0.87 um. If the core refractive index n = 1.445, the group index N1 = 1.456,
and A is approximately independent of wavelength, determine the modal-dispersion response
time a, for a 2-km-long fiber.
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