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//Example 2.4
//Program to estimate
//(a) Normalized frequency for the fiber
//(b) The Number of guided modes
clear;
clc ;
close ;
//Given data
n1=1.48; //CORE REFRACTIVE INDEX
delta=0.015 //RELATIVE REFRACTIVE INDEX DIFFERENCE
d=80*10^(-6); //metre - CORE DIAMETER
lambda=0.85*10^(-6); //metre - OPERATING WAVELENGTH
a=d/2; //CORE RADIUS
//(a) Normalized frequency for the fiber
V=2*%pi/lambda*a*n1*sqrt(2*delta);
//(b) The Number of guided modes
Ms=(V^2)/2;
//Displaying the Results in Command Window
printf("\n\n\t The Normalized frequency for the fiber is %0.1f.",V);
printf("\n\n\t The Number of guided modes of the fiber is %d.",ceil(Ms));
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