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// Example 6.1
// Calculation of the gain
// Page no 249
clc;
clear;
close;
//Given data
n=1.5; // Refractive ondex of air
lambda=1550*10^-9; // Wavelength
c=3*10^8; // Velocity of light
p=5.73*10^-17; // Power spectral density
h=6.63*10^-34 // Planck constant
// Gain
f=c/lambda;
G=(p/(2*n*h*f))+1;
//Displaying results in the command window
printf("\n Gain G = %0.0f ",G);
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