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// Example 4.23
// Calculation of overall external efficiency of a Laser diode
// Page no 486
clc;
clear;
close;
//Given data
eg=1.43; // Bandgap energy
v=2.5; // Voltage applied
nd=0.30; // Optical efficiency of laser diode
//// Overall external efficiency
ne=(nd*eg/v)*100;
//Display result in the command window
printf("\n Overall external efficiency (percentage)= %0.0f .",ne);
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