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//clear//
//Caption: To find the energy of the photon incident on photodiode
//and Minimum incident optical power
//Example7.4
//page 262
clear;
clc;
close;
h = 6.626e-34; //planks constant J/s
C = 3e08; //free space velocity in m/s
B = 10e06; //data rate 10 Mb/sec
tuo = 2/B; //1/tuo = half the data rate B
Lambda = 850e-09; //operating wavelength in nm
E = 20.7*h*C/Lambda;
Pi = E/tuo;
disp(E,'Energy of the incident photon E =')
disp(Pi,'minimum incident optical power Pi =')
disp(10*log10(Pi*1000),'minimum incident optical power in dBm =')
//Result
// Energy of the incident photon E = 4.841D-18
// minimum incident optical power Pi = 2.420D-11
// minimum incident optical power in dBm = - 76.161059
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