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// Example 6.39
// Calculation of a) operating wavelength b) incidence optical power
// Page no 495
clc;
clear;
close;
//Given data
n=0.60 // Quantum efficiency
E=1.5*10^-19; // Photons of energy
e=1.602*10^-19; // Charge of an electron
h=6.626*10^-34; // Planck constant
c=3*10^8; // Velocity of light
I=2*10^-6; // Photocurrent
// a)Operating wavelength
lambda=(h*c)/E;
lambda=lambda*10^6;
// b)Incident optical power
R=(n*e)/E;
P=I/R;
P=P*10^6;
//Displaying results in the command window
printf("\n Wavelength of photodiode (in micrometer)= %0.2f ",lambda);
printf("\n Incident optical power(in microWatt) = %0.2f ",P);
// The answers vary due to round off error
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