Problems

$12\mathrm{.}1$ The distance between the transmitter and the receiver in an optical fiber transmis$-$

sion link using direct detection, intensity modulation is $100$ km $.$ The fiber link is

made by splicing similar fibers of $22$ km length each. The splicing loss is $0\mathrm{.}15$ dB per

splice. The fiber attenuation is $0\mathrm{.}4$dB$//$km$.$

$($a$)$ How many splices are required for $100$ km link? Hence, estimate the total splice

loss.

$($b$)$ The coupling loss is $1\mathrm{.}5$ dB in total at the transmitter and the receiver.

If the optical receiver has a receiver sensitivity of $-30$ dBm $,$ what is the required

power at the output of the optical transmitter if a power operating margin of $5$ dB is

used?

Complete Matlab and or Simulink simulation of the problems given. In the report file include the matlab code and simulink screenshots. Show the results in graphs or tables. Comment on the results.