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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