4 files changed, 80 insertions, 0 deletions
diff --git a/3506/CH11/EX11.1/Ex_11_1.JPG b/3506/CH11/EX11.1/Ex_11_1.JPG
new file mode 100644
index 000000000..472247de3
--- /dev/null
+++ b/3506/CH11/EX11.1/Ex_11_1.JPG
diff --git a/3506/CH11/EX11.1/Ex_11_1.sce b/3506/CH11/EX11.1/Ex_11_1.sce
new file mode 100644
index 000000000..87edf6cce
--- /dev/null
+++ b/3506/CH11/EX11.1/Ex_11_1.sce
@@ -0,0 +1,37 @@
+//Optical Fiber communication by A selvarajan
+//example 11.1
+//OS=Windows XP sp3
+//Scilab version 5.5.1
+clc;
+clear all;
+BW=7//bandwidth in MHz
+SNR=60//signal to noise ratio in dB
+Pin=0//Launched power in dBm
+Trise_source=20//risetime at source LED in ns
+delta_lambda=20//spectra width in nm
+lambda=850;//operating wavelength in nm
+c=2.998*10^5;//velocity of light in Km/sec
+R=0.3//Detector PIN FET responsivity in A/W
+Cdiode=3//diode capacitance in pf
+trise_detector=1//risetime at detector in ns
+S=-30//sensitivity in dbm
+Lsplice=0.2//splice loss in dB/connector
+NA=0.2//numerical aperture for GI/MM
+n1=1.46//refractive index of core
+A=2//attenuation in dB/Km
+Ls=3//loss due to source in dB
+Ld=1//loss due to detector in dB
+Psm=5//system margin in dB
+c=3*10^8//velocity of light in m/s
+
+//solution
+
+Available_power=Pin-S;//available power in dB
+Total_loss=Ls+Ld+Psm;
+Power_left=Available_power-Total_loss;//power left in dB
+L=(Power_left+Lsplice)/(Lsplice/2+2);
+tmod=L*10^3*(NA^2)/(2*c*n1);//modal dispersion in s
+Bit_rate=1/tmod;//bit rate in bps
+mprintf('Maximum permissible link length is =%fKm',L);
+
+mprintf('\nMaximum permissible bit rate is =%fMbps',Bit_rate/10^6);//division by 10^6 to convert the unit from bps to Mbps//the answer is different because of rounding off 
diff --git a/3506/CH11/EX11.2/Ex_11_2.JPG b/3506/CH11/EX11.2/Ex_11_2.JPG
new file mode 100644
index 000000000..322529e2a
--- /dev/null
+++ b/3506/CH11/EX11.2/Ex_11_2.JPG
diff --git a/3506/CH11/EX11.2/Ex_11_2.sce b/3506/CH11/EX11.2/Ex_11_2.sce
new file mode 100644
index 000000000..b65d3b6e6
--- /dev/null
+++ b/3506/CH11/EX11.2/Ex_11_2.sce
@@ -0,0 +1,43 @@
+//Optical Fiber communication by A selvarajan
+//example 11.2
+//OS=Windows XP sp3
+//Scilab version 5.5.1
+clc;
+clear all;
+BW=7//bandwidth in MHz
+SNR=60//signal to noise ratio in dB
+Pin=0//Launched power in dBm
+Trise_source=4//risetime at source LED in ns
+delta_lambda=1//spectra width in nm
+lambda=1300;//operating wavelength in nm
+c=2.998*10^5;//velocity of light in Km/sec
+R=0.3//Detector PIN FET responsivity in A/W
+Cdiode=3//diode capacitance in pf
+trise_detector=5//risetime at detector in ns
+F=2.1//amplifier noise figure in dB
+Camp=2//amplifier capacitance in pf
+L=2//minimum link length in Km
+Lsplice=0.5//splice loss in dB/connector
+NA=0.22//numerical aperture for GI/MM
+BWGI=600//GI/MM fiber bandwidth in MHz F3dB_optical
+Te=630//temperate in Kelvin
+K=1.38064852 *10-23//boltzman constant in m2 kg s-2 K-1
+//solution
+Rload=1/(2*%pi*(Cdiode+Camp)*BW)*10^6//maximum load resistance in ohm Actual value
+Rload=4300//approximated value in ohm
+BWRx=1/(2*%pi*(Cdiode+Camp)*Rload)//receiver BW in Hz
+SbyN=10^(SNR/10)//SNR in normal scale
+Pmin=10*log10(sqrt(SbyN*4*K*Te*BW/(0.5*Rload*R^2)))//input power in W
+L1=Pmin/0.2//power budget limited link length in Km
+mprintf('Maximum permissible link length is =%fKm',L1);
+
+Trise_required=(0.35/BW)*10^3//Bandwith budgetting rise time required is rise time required in ns//multiplication by 10^3 to convert msec to ns
+Trise_receiver=2.19*Rload*(Cdiode+Camp)*10^-3//rise time of receiver in ns//multiplication by 10^3 to convert msec to ns
+Trise_fiber=sqrt(Trise_required^2-Trise_receiver^2-Trise_source^2)//fiber dispersion in ns
+//for GI
+f3dB_electrical=0.71*BWGI;//3dB elctrical BW in MHzKm
+t_intra_modal=1//intra modal dispersion in ns/Km
+t_inter_modal=3//intermodal dispersion in ns/Km
+t_fiber_GI=sqrt(t_intra_modal^2+t_inter_modal^2);//rise time of fiber in ns/Km
+L2=Trise_fiber/t_fiber_GI//link length in Km
+mprintf('\n Maximum permissible link length for GI is =%fKm',L2);