Explaining concept of four wave mixing

Question

Question 1) Optical fiber communication is preferred explain why?

Question 2) Briefly describe the refractive index profile for graded index fibers.

Question 3) What do you mean by chirp signal?

Question 4) What is the concept of four wave mixing? describe.

Question 5) Describe briefly the characteristics of optical materials.

Question 6) What do you mean by Receiver sensitivity.

Question 7) What do you mean by non linearity of optical fibers.

Question 8) What do you mean by splicing?

Question 9) What do you mean by model noise? Describe in brief.

Question 10) State Maxwell's equation.

Question 11) Compute the numerical aperture of a step index fiber having n₁= 1.48 and n₂= 1.46. Determine the maximum entrance angle θ_0.max for this fiber if the outer medium is an with n = 100.