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// Example 6.6
// Calculation of (a) the saturation power and (b) the bias current I
// Page no 273
clc;
clear;
close;
//Given data
c=3*10^8; // Velocity of light
lambda=1530*10^-9; // Wavelength
t=0.3 // Overlap factor
r=7.3*10^-20; // Gain cross section
r0=1*10^-9; // Carrier lifetime
q=1.609*10^-19;
v=7.5*10^-16; // Active volume
h=6.63*10^-34 // Planck constant
A=5*10^-6; // Effective area
g=4.82*10^3; // Small signal gain coeffifient
N=3.5*10^23; //
// (a) the saturation power and
f=c/lambda;
Ps=(h*f*A)/(t*r*r0);
Ps=Ps*10^-3;
// (b) the bias current I
I=(g/(r*r0)+N/r0)*q*v;
I=I*10^3;
// Displaying results in the command window
printf("\n The saturation power Psat = %0.3f mW ",Ps);
printf("\n The bias current I = %0.3f mA ",I);
// The answers vary due to round off error
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