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// Example 4.15.10 page 4.42
clc;
clear;
tau=0.1d-6; //pulse broadning
dist=18d3; //distance
Bopt=1/(2*tau); //computing optical bandwidth
Bopt=Bopt*10^-6;
dispertion=tau/dist; //computing dispersion
dispertion=dispertion*10^12;
BLP=Bopt*dist; //computing Bandwidth length product
BLP=BLP*10^-3;
printf("\noptical bandwidth is %d MHz.\nDispersion per unit length is %.1f ns/km.\nBandwidth length product is %d MHz.km",Bopt,dispertion,BLP);
printf("\nNOTE - printing mistake in the book at dispersion per unit length.\nThey have printed ps/km; it should be ns/km");
//printing mistake in the book at dispersion per unit length.They have printed ps/km; it should be ns/km.
//answer in the book 5.55 ps/km (incorrect)
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