written 17 months ago by | • modified 17 months ago |
Problem 1 Consider a fibre with $n_1=1.48, n_2=1.46$ and core radius $a=30 \mu \mathrm{m}$.
(a) Show that all rays making an angle $\theta\lt9.43^{\circ}$ with the axis will be guided through the fibre.
(b) Assume $\theta=3.43^{\circ}$ and calculate the number of total internal reflections that will occur in propagating through one $\mathrm{km}$ length of the fiber.