problem 1: How will you measure:
a) Fiber refractive index profile
b) Numerical Aperture in the optical fiber
problem 2: How will you measure:
b) Fiber diameter in optical communication system?
problem 3: prepare brief note on the Numerical aperture measurement.
problem 4: What do you mean by the term internal quantum efficiency and external quantum efficiency of the optical source?
problem 5: What do you mean by the term population inversion?
problem 6: Illustrate threshold condition for the Laser oscillations.
problem 7: Describe the term spontaneous emission.
problem 8: Define the term LED internal quantum efficiency.
problem 9: Compare LEDs with injection laser in respect of its benefits and drawbacks in optical fiber communication.
problem 10: Describe the principle and working of LASER diode. As well describe the modulation of Laser diodes.