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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 8.2
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+n1=1.48;//Dimensionless refractive index of core
+n2=1.46;//Dimensionless refractive index of cladding
+d=100e-6;//Width of the waveguide in m
+Lambda0=1e-6;//Vacuum wavelength in m
+
+V=%pi*(d/Lambda0)*sqrt((n1^2)-(n2^2));//Dimensionless normalized film thickness
+mprintf("\n V = %.1f",V);
+
+//Let the total number of possible modes be 'N'
+N=2*(1 + floor(2*V/%pi));
+mprintf("\n N = %d",N);