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//Example 5.5
//Program to estimate the total insertion loss of the fiber joint
//with a lateral misalignment and angular misalignment
clear;
clc ;
close ;
//Given data
V=2.40; //NORMALIZED FREQUENCY
n1=1.46; //CORE REFRACTIVE INDEX
d=8*10^(-6); //metre - CORE DIAMETER
NA=0.1; //NUMERICAL APERTURE
y=1*10^(-6); //metre - LATERAL MISALIGNMENT
theeta=1; //degree - ANGULAR MISALIGNMENT
//Normalized Spot Size
a=d/2;
omega=a*(0.65+1.62*V^(-3/2)+2.88*V^(-6))/sqrt(2);
//Loss due to lateral offset
Tl=2.17*(y/omega)^2;
//Loss due to angular misalignment
Ta=2.17*((theeta*%pi/180)*omega*n1*V/(a*NA))^2;
//Total insertion loss
Tt=Tl+Ta;
//Displaying the Result in Command Window
printf("\n\n\t Total Insertion Loss is %0.2f dB .",Tt);
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