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+//Fiber Optics Communication Technology, by Djafer K. Mynbaev and Lovell L.scheiner
+//Windows 7
+//Scilab version- 6.0.0
+//Example 3.2.1
+clc;
+clear;
+//given
+
+A=0.5;//attenuation in dB/Km
+Pin=1E-3;//input power in milli watts
+L=15;//length in kilometers
+
+a=[(-A*L)/10];
+b=10^(a);
+Pout=(Pin*b)*1E3;
+mprintf("ouput power is=%.3f mW",Pout);