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// Example 2.10.2 page 2.40
clc;
clear;
a=50d-6; //core radius
lamda=1500d-9; //operating wavelength
n1=2.53; //core refractive index
n2=1.5; //cladding refractive index
delta=(n1-n2)/n1; //computing delta
v= 2*3.14*a*n1*sqrt(2*delta)/lamda; //computing normalized frequency
M=(v)^2/2; //computing guided modes
printf("\nNormalized Frequency is %.1f\nTotal number of guided modes are %.d",v,M);
printf("\nNOTE - Calculation error in book. \n Normalized frequency is 477, it is calculated as 47.66");
//Calculation error in book. Normalized frequency is 477, it is calculated as 47.66, hence answers after that are erroneous.
//answers in the book
//normalized frequency = 48.(incorrect)
//guided modes = 1152.(incorrect)
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