initial commit / add all books

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diff --git a/3740/CH9/EX9.1/Ex9_1.jpg b/3740/CH9/EX9.1/Ex9_1.jpg
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diff --git a/3740/CH9/EX9.1/Ex9_1.sce b/3740/CH9/EX9.1/Ex9_1.sce
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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes

+//Example 9.1

+//OS=Windows XP sp3

+//Scilab version 5.5.2

+clc;

+clear;

+

+//given

+eta=0.6;//Dimensionless Quantum Efficiency of photodiode 

+Lambda0=1.3e-6;//Wavelength in m

+e=1.6e-19;//Electronic charge in C

+P=10e-6;//Optical power in W

+h=6.6e-34;//Planck's constant in SI Units

+c=3e8;//Speed of light in m/s

+iD=3e-9;//Reverse bias leakage current in A

+Deltaf=500e6;//Bandwidth of system in Hz

+k=1.38e-23;//Boltzmann constant in SI Units

+Rl=50;//Load resistor in Ohms

+T=300;//Absolute temperature in K

+Fn=1;//Assumption

+

+iLambda=eta*P*e*Lambda0/(h*c);//Corresponding photogenerated current in A

+mprintf("\n iLambda = %.2f uA",iLambda/1e-6);//Dividing by 10^(-6) to convert to uA

+//The answers vary due to round off error

+

+//Let the total shot noise be Ishot

+Ishot=sqrt(2*(iLambda+iD)*e*Deltaf);

+mprintf("\n Ishot = %.1f nA",Ishot/1e-9);//Dividing by 10^(-9) to convert to nA

+

+DeltaiJ=sqrt(4*k*T*Fn*Rl*Deltaf)/Rl;//Corresponding Johnson noise in A

+mprintf("\n DeltaiJ = %.2f nA",DeltaiJ/1e-9);//Dividing by 10^(-9) to convert to nA

+//The answers vary due to round off error

+

+SNR=(iLambda^2)/(Ishot^2 + DeltaiJ^2);//Corresponding Dimensionless Signal to Noise Ratio

+mprintf("\n (S/N) = %.2f",SNR);//The answers vary due to round off error

diff --git a/3740/CH9/EX9.2/Ex9_2.jpg b/3740/CH9/EX9.2/Ex9_2.jpg
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diff --git a/3740/CH9/EX9.2/Ex9_2.sce b/3740/CH9/EX9.2/Ex9_2.sce
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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes

+//Example 9.2

+//OS=Windows XP sp3

+//Scilab version 5.5.2

+clc;

+clear;

+

+//given

+L=15;//Length of link in km

+Deltaf=100e6;//Bandwidth in b/s

+Pmin=-50;//Receiver sensitivity in dBm is the minimum power received by receiver

+alphat=2;//Fiber transmission loss in dB/km

+Ns=10;//Number of splices contributing to loss

+Ls=0.5;//Loss of each splice in dB

+Lc=1;//Detector coupling loss in dB

+La=5;//Additional Losses due to various factors in dB;

+//Let the transmitter launch power in dBm be 'P'

+P=0;

+

+Margin=P-Pmin;//Power Margin in dBm

+mprintf("\n Margin = %d dBm",Margin);

+

+//Let the total system loss in dB be 'Lt'

+Lt=alphat*L+Lc+Ns*Ls+La;

+mprintf("\n Total System Loss = %d dB",Lt);

+mprintf("\n Excess power margin = %d dB",Margin-Lt);//Excess power margin in dB

diff --git a/3740/CH9/EX9.3/Ex9_3.jpg b/3740/CH9/EX9.3/Ex9_3.jpg
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diff --git a/3740/CH9/EX9.3/Ex9_3.sce b/3740/CH9/EX9.3/Ex9_3.sce
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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes

+//Example 9.3

+//OS=Windows XP sp3

+//Scilab version 5.5.2

+clc;

+clear;

+

+//given

+Lambda0=0.63e-6;//Wavelength in m

+Deltan=6e-3;//Dimensionless Change in refractive index of titanium

+n1=2.286;//Ordinary dimensionless refractive index of Titanium 

+

+n2=n1-Deltan;//Changed dimensionless refractive index of titanium

+NA=sqrt(n1^2 - n2^2);//Corresponding dimensionless numerical aperture

+mprintf("\n NA = %.3f",NA);