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//Chapter-3,Example 3_9,Page 3-21
clc()
//Given Data:
u1=1.47 //R.I. of Core
u2=1.46 //R.I.of Cladding
lam=1.3*10^-6 //wavelength in meter
//Calculations:
NA=sqrt(u1^2-u2^2) //Formula to find Numerical Aperture
//The condition for single mode is V<2.405
//2*%pi*a*NA/lam < 2.405
a=2.405*lam/(2*%pi*NA) //Maximum radius of fibre
printf('Maximum radius of Fibre is =%.8f meter \n',a)
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