AA multimode step index fiber with a core diameter of 80 um and relative refractive index difference of 1.5% is operating at wavelength of 0.85 um. If the core refractive index is 1.48 estimate the normalized frequency for the fiber and the number of guided modes. B) Estimate the maximum core diameter for a single mode optical fiber with relative refractive index difference 1.5% and core refractive index 1.48 operating at a wavelength of 0.85 um

AA multimode step index fiber with a core diameter of 80 um and relative refractive index difference of 1.5% is operating at wavelength of 0.85 um. If the core refractive index is 1.48 estimate the normalized frequency for the fiber and the number of guided modes. B) Estimate the maximum core diameter for a single mode optical fiber with relative refractive index difference 1.5% and core refractive index 1.48 operating at a wavelength of 0.85 um