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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 3.1
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+w=10e-3;//Width of the KD*P crystal in m
+r=26.4e-12;//Linear electro-optic coefficient of the crystal in m/V
+n0=1.51;//refractive index of the crystal
+E=4000;//Applied voltage in V
+
+//Let the change in refractive index be Deltan = |n-n0|
+Deltan=(1/2)*r*E*(n0^3)/w;//Dimensionless change in refractive index of the crystal
+mprintf("The change in refractive index of the crystal = %.1e",Deltan);