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//clear//
//Caption:Program to Find Attenuation in dB/km
//Example3.1
//page 91
clear;
clc;
z = [1 2]; //diatances are in kilometer
alpha_in_dB_per_km = 3;
r = (alpha_in_dB_per_km*z)/10;
P0_Pz = (10^r);
for i = 1:length(P0_Pz)
Pz_P0(i) = 1-(1/P0_Pz(i)) ;
end
disp(Pz_P0*100,'Optical signal power decreased by in percentage')
//RESULT
//Optical signal power decreased by in percentage
// 49.881277
// 74.881136
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