Question 1) Why do we prefer optical fiber communication for long distance transmission?
Question 2) Compute the transmission distance over which the optical power will attenuate by a factor of 10 for the fiber with loss of O.2dB/km. Assume the typical relation of fiber attenuate on loss.
Question 3) What do you mean by single mode fiber. What is the importance of cut off wavelength concern with it?
Question 4) How and why do stimulated scattering effects occur in optical fibers?
Question 5) Where do you use distributed feedback laser (DFB) structures?
Question 6) What do you mean by Single longitudinal Mode (SLM) laser?
Question 7) State quantum efficiency and the responsivity of a photodiode.
Question 8) Dry fibers have acceptable losses over a spectral region extending from 1.3 to 1.6 pm. Calculate the capacity of a WDM system covering this entire region using 40 Gb/s channels spaced apart by 50 GHz i) Describe briefly frequency chirping in optical communication.
Question 9) Write down the four desirable properties of a tunable optical filter.