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+//Fiber-optics communication technology, by Djafer K. Mynbaev and Lowell L. Scheiner
+//Example 11.1.3
+//windows 7
+//Scilab version-6.0.0
+clc;
+clear ;
+//given
+
+ETA=0.7;//The quantum efficiency
+alphaabs=1E+5;//absorption coefficient
+w=(log(1-ETA))/(-alphaabs);//The width of the depletion region of an InGaAs photodiode um
+
+mprintf("The width of the depletion region of an InGaAs photodiode =%.1f um",w*1E+6);//Multiplication by 1e6 to convert unit from m to um