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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 8.10
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given - Case (i)
+Lambda0=850e-9;//Wavelength in m
+L=1e3;//Length of the silica based fiber in m
+DeltaLambda0=50e-9;//Linewidth of the fiber in m
+c=3e8;//Speed of light in m/s
+//Let the term '((d^2)n)/(dLambda0)^2' in m^-2 be denoted by dsquare
+dsquare=3e10;
+
+DeltaT=L*Lambda0*dsquare*DeltaLambda0/c;//Material dispersion for laser in s
+mprintf("\n DeltaT for laser = %.1e s",DeltaT);//The answers vary due to round off error
+
+//given - Case (ii)
+Lambda0=1550e-9;//Wavelength in m
+L=1e3;//Length of the silica based fiber in m
+DeltaLambda0=3e-9;//Linewidth of the fiber in m
+c=3e8;//Speed of light in m/s
+//Let the term '((d^2)n)/(dLambda0)^2' in m^-2 be denoted by dsquare
+dsquare=4.24e9;
+
+DeltaT=L*Lambda0*dsquare*DeltaLambda0/c;//Material dispersion for LED in s
+mprintf("\n DeltaT for LED = %.1e s",DeltaT);