initial commit / add all books

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diff --git a/3822/CH9/EX9.1/Ex9_1.jpg b/3822/CH9/EX9.1/Ex9_1.jpg
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diff --git a/3822/CH9/EX9.1/Ex9_1.sce b/3822/CH9/EX9.1/Ex9_1.sce
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 91

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+L1=2;//length of fiber in m

+L2=0.002;//length of fiber cutback in Km for testing

+VF=2.1;//output voltage of photodetector in volts at lambda = 0.85um

+lamda=0.85e-6//wavelength in m

+VN=10.5;//output voltage for 2m cutback fiber length at wavelength 0.85um in volts

+

+a=10/(L1-L2);

+b=log10(VN/VF);

+alphadB=a*b;//attenuation per Kilometer in dB/km at wavelength 0.85um

+mprintf("The attenuation per Kilometer at wavelength 0.85um is=%.2f dB/Km",alphadB);

diff --git a/3822/CH9/EX9.2/Ex9_2.jpg b/3822/CH9/EX9.2/Ex9_2.jpg
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diff --git a/3822/CH9/EX9.2/Ex9_2.sce b/3822/CH9/EX9.2/Ex9_2.sce
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 9.2

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+L1=1.5;//length of optical fiber in Km

+L2=0.002;//length of fiber cutback in Km

+Pn=50.1;//output power in microwatts for the full link length

+Pf=385.4;//output power in microwatts for fiber cutback

+

+a=10/(L1-L2);

+b=log10(Pf/Pn);

+alphadB=a*b;//attenuation per Kilometer in dB/km at wavelength 1.1um

+mprintf("The attenuation per Kilometer at wavelength 1.1um is=%.2f dB/Km",alphadB);

diff --git a/3822/CH9/EX9.3/Ex9_3.jpg b/3822/CH9/EX9.3/Ex9_3.jpg
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diff --git a/3822/CH9/EX9.3/Ex9_3.sce b/3822/CH9/EX9.3/Ex9_3.sce
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 9.3

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+L=1.2//link length in Km

+Gama_o=12.7;//optical output pulse of 3dB width in nanoseconds

+Gama_i=0.4;//optical input pulse of 3dB width in nanosseconds

+

+q=(Gama_o)^2;

+w=(Gama_i)^2;

+e=q-w;

+u=sqrt(e);

+v=1.2;

+Gama_3dB=u/v;//3dB pulse dispersion for the fibre in ns/Km

+mprintf("\n The 3dB pulse dispersion for the fibre is=%.2f ns/Km",Gama_3dB);

+Bopt=0.44/(Gama_3dB*1e-9);//fibre bandwidth length productmultiplication by 1e-9 as gama is in nsKm

+mprintf("\n The fibre bandwidth length product is=%.2f MHzKm",Bopt/1e6); //multiplication by 1e6 to convert unit from Hz to MHz

+//the answer vary due to rounding

diff --git a/3822/CH9/EX9.4/Ex9_4.jpg b/3822/CH9/EX9.4/Ex9_4.jpg
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index 000000000..3a2ba90c9
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diff --git a/3822/CH9/EX9.4/Ex9_4.sce b/3822/CH9/EX9.4/Ex9_4.sce
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 9.4

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+alpham=26.1;//angular limit of far field pattern in degrees

+NA=sind(alpham);//numerical aperture 

+L=16.7;//length of picture in cm

+

+AB=(L/2)/[tand(alpham)];//distance from the screen in cm

+mprintf("The numerical appertur is=%.2f ",NA);

+mprintf("\nThe distance from the screen is=%.2f cm",AB);

+//th answer vary due to rounding

diff --git a/3822/CH9/EX9.5/Ex9_5.jpg b/3822/CH9/EX9.5/Ex9_5.jpg
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index 000000000..95a73ef83
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diff --git a/3822/CH9/EX9.5/Ex9_5.sce b/3822/CH9/EX9.5/Ex9_5.sce
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 9.5

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+A=6.0;//measured output pattern size in cm

+D=10.0;//distance between the screen and fibre face in cm

+

+q=(A)^2;

+w=4*D^2;

+u=sqrt(q+w);

+NA=A/u;//numerical aperture

+mprintf("The numerical aperture is=%.2f",NA);

diff --git a/3822/CH9/EX9.6/Ex9_4_1.jpg b/3822/CH9/EX9.6/Ex9_4_1.jpg
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diff --git a/3822/CH9/EX9.6/Ex9_4_1.sce b/3822/CH9/EX9.6/Ex9_4_1.sce
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index 000000000..acb6feacc
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 9.6

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+dphibydt=4;//angula velocity of roatng mirror in rad/sec

+L=0.1;//distance between mirror and the detector in meter

+We=250;//shadow pulse width in micrometer;

+

+dsbydt=L*dphibydt;

+d0=We*[dsbydt];//outer diameter of the fiber in micrometer

+mprintf("The outer diameter of the fiber is=%.2f um",d0);

diff --git a/3822/CH9/EX9.7/Ex9_5_1.jpg b/3822/CH9/EX9.7/Ex9_5_1.jpg
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index 000000000..eef31aaa8
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+++ b/3822/CH9/EX9.7/Ex9_5_1.jpg
diff --git a/3822/CH9/EX9.7/Ex9_5_1.sce b/3822/CH9/EX9.7/Ex9_5_1.sce
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+
+//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar

+//Example 9.7

+//OS=Windows 10

+////Scilab version Scilab 6.0.0-beta-2(64 bit)

+clc;

+clear;

+

+//given

+P1=100;//power at the input in microwatts

+P2=83.2;//power at the output in microwatts

+P3=35.5;//power at the ouput after connector in microwatts

+L=1.8;//length of the added fibre in Km

+alpha=1.5;//fiber attenuation in dB/L;

+

+//case 1:

+Ls=-10*log10(P2/P1);//insertion loss of connector in dB

+mprintf("\n The insertion loss of connector is=%.2f dB",Ls);

+

+//case 2:

+deltaLs=-10*log10(P3/P1)-Ls-alpha*L;//excess loss of the connector

+mprintf("\n The excess loss of connector is=%.2f dB",deltaLs);