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+// Example no. 2.10
+// To design single mode fiber such that absolute accumulated dispersion should not exceed 1100ps/nm
+// Page no. 77
+
+clc;
+clear;
+
+// Given data
+lambda1=1530;                              // Left edge of wavelength range in nm
+lambda2=1560;                              // Rigth edge of wavelength range in nm
+lambda0=1545;                              // Center of the band in nm
+L=80;                                     // Fiber length in km
+
+disp('We choose center of band (lambda_0) for large maximum allowable dispersion slope.');
+
+Dlambda2=1100/L;                         // Dispersion at rigth edge of band in ps/nm/km
+S=Dlambda2/(lambda2-lambda0);            // Dispersion slope in ps/nm^2/km
+
+// Displaying the result in command window
+printf('\n Dispersion slope = %0.3f ps/nm^2/km',S);