initial commit / add all books

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diff --git a/3834/CH6/EX6.2.1/Ex6_2_1.jpg b/3834/CH6/EX6.2.1/Ex6_2_1.jpg
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diff --git a/3834/CH6/EX6.2.1/Ex6_2_1.sce b/3834/CH6/EX6.2.1/Ex6_2_1.sce
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+//Fiber-optics communication technology, by Djafer K. Mynbaev and Lowell L. Scheiner 
+//Example 6.2.1
+//windows 8
+//Scilab version-6.0.0
+clc;
+clear ;
+//given
+
+a1=12.45E-6;//radius of the cladding for silica fiber
+a=4.15E-6;//radius of the core for silica fiber
+w0=5.15E-6;//in m
+lambda=1600E-9;//wavelength in m
+x=exp(-2*(a1^2/w0^2));
+y=1-x;
+Ploss=-10*log10(y);//power leakage in dB
+
+mprintf("Possible power leakage= %.2f micro-dB",Ploss*1e6);//multiplication by 1e6 to convert unit from dB to micro dB
diff --git a/3834/CH6/EX6.3.1/Ex6_3_1.jpg b/3834/CH6/EX6.3.1/Ex6_3_1.jpg
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diff --git a/3834/CH6/EX6.3.1/Ex6_3_1.sce b/3834/CH6/EX6.3.1/Ex6_3_1.sce
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+//Fiber-optics communication technology, by Djafer K. Mynbaev and Lowell L. Scheiner 

+//Example 6.3.1

+//windows XP

+//Scilab version-5.5.1

+clc;

+clear ;

+//given

+

+L=100E12;//Length of the single-mode fiber link in nm

+

+lambda0=1310;//average of zero-dispersion wavelength in nm

+lambda=1550;//operating wavelength in nm

+S0=0.092;//zero dispersion slope in ps/nm^2

+

+y=lambda0/lambda;

+z=1-y^4;

+Dlambda=(S0/4)*lambda*z;//dispersion coefficient in ps/nm.Km

+

+deltalambda=1;//light source's spectral width in nm

+

+deltatchrom=Dlambda*deltalambda*L;//Pulse spread caused by chromatic dispersion in s

+

+mprintf("Pulse spread caused by chromatic dispersion = %.2f ps",deltatchrom*1E-12);//multiplication by 1e-12 to convert unit from s to ps

+

+x=6.66;//here, x= L/Ldcf assumed to be 6.66

+

+Ddcf=-Dlambda*x;//dispersion in DCF in ps/nm.Km

+mprintf("\nWe need DCF of %.2f ps/nm.km to compensate for dispersion in a conventional SM fiber.",Ddcf);