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+//Introduction to Fiber Optics by A. Ghatak and K. Thyagarajan, Cambridge, New Delhi, 1999
+//Example 12.2
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+//given 
+rho=0.5;//responsitivity of Si PIN detector in A/W
+Vb=20;//reverse bias voltage across the detector in V
+//Case (i):
+Rl=100;//load resistor in ohms
+Pmax=Vb/(rho*Rl);//maximum value of optical power P falling on the photodetector in W
+mprintf("\n For Rl=100 Ohm:");
+mprintf("\n Pmax=%.1f mW",Pmax/1e-3)//Division by 10^(-3) to convert into mW
+mprintf("\n Vr/P = %.1f mV/mW",rho*Rl);//Bias voltage per unit power in mV/mW
+//Case (ii):
+Rl=10e3;//load resistor in ohms
+Pmax=Vb/(rho*Rl);//maximum value of optical power P falling on the photodetector in W
+mprintf("\n For Rl=10 kOhm:");
+mprintf("\n Pmax=%.1f mW",Pmax/1e-3)//Division by 10^(-3) to convert into mW
+//Bias voltage per unit power in V/mW :
+mprintf("\n Vr/P = %.1f V/mW",rho*Rl/1e3);//Division by 10^3 to convert into V/mW