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// Example 4.18.1 page 4.45
clc;
clear;
L=10; //length of optical link
n1=1.49 //refractive index
c=3d8; //speed of light
delta=1/100; //relative refractive index
delTS=L*n1*delta/c; //computing delay difference
delTS=delTS*10^12;
sigmaS=L*n1*delta/(2*sqrt(3)*c); //computing rms pulse broadning
sigmaS=sigmaS*10^12;
B=1/(2*delTS); //computing maximum bit rate
B=B*10^3;
B_acc=0.2/(sigmaS); //computing accurate bit rate
B_acc=B_acc*10^3;
BLP=B_acc*L; //computing Bandwidth length product
printf("\nDelay difference is %d ns.\nRMS pulse broadning is %.1f ns.\nBit rate is %.1f Mbit/s.\nAccurate bit rate is %.3f Mbits/s.\nBandwidth length product is %.1f MHz.km",delTS,sigmaS,B,B_acc,BLP);
//answer for maximum bit rate is given as 1.008 Mb/s, deviation of 0.008 Mb/s.
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