BROADBAND COMMUNICATION QUESTION BANK 1. (a) What are the advantages of optical fiber cables over the co-axial cables? (06) (b) Calculate NA, Acceptance angle and Angle of fiber with core and cladding refractive index values as n 1 =1.5 and n 2 =1.45 respectively. (06) (c) Explain the “mode theory” of optical fiber. (06) 2. (a) What is meant by acceptance angle and acceptance cone for optical fiber? Show and explain it’s relationship to numerical aperture and refractive indices of core & cladding. (06) (b) If a MMSI fiber of core radius 25 micrometer operating at 1300nm, has core and cladding refractive index as 1.5 & 1.38 respectively; Calculate Numerical aperture, Normalized frequency, Solid acceptance angle and number of modes ent