problem 1: A graded index fiber with the parabolic index profile supports the propagation of 742 guided modes. The fiber consists of a NA in air of 0.3 and a core diameter of 70 micrometer. Find out the wavelength of the light propagating in the fiber. Further find out the maximum diameter of the fiber that gives single mode operation at similar wavelength.

problem 2: Draw the graph of attenuation as a function of wavelength, plot the three transmission windows.

problem 3: Describe the different types of losses in the optical fibers.

problem 4: Describe the word intermodal dispersion.

problem 5: At what wavelength, the attenuation is minimum?

problem 6: What do you mean by term Zero Dispersion wavelength?

problem 7: What do you mean by unit of Dispersion?

problem 8: What do you mean by dispersion-flattened fibers?

problem 9: What is the cause of material dispersion and waveguide dispersion? As well describe dispersion-shifted fibers.

problem 10: What do you mean by radiation losses?