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+//Fiber-optics communication technology, by Djafer K. Mynbaev and Lowell L. Scheiner
+//Example 10.2.1
+//windows 7
+//Scilab version-6.0.0
+clc;
+clear ;
+//given
+lambda=1300;//Operating wavelength in nm
+ETAext=0.1;//External Quantum Efficiency
+e=1.6E-19;//Electrons value in Coulomb
+Ep=0.0153E-17;//photon's energy in J
+SlopeE=(Ep/e)*ETAext;//Slope Efficiency
+mprintf("Slope Efficiency = %.3f",SlopeE);