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Diffstat (limited to '3506/CH4/EX4.1/Ex_4_1.sce')
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1 files changed, 23 insertions, 0 deletions
diff --git a/3506/CH4/EX4.1/Ex_4_1.sce b/3506/CH4/EX4.1/Ex_4_1.sce new file mode 100644 index 000000000..0cd4b8e96 --- /dev/null +++ b/3506/CH4/EX4.1/Ex_4_1.sce @@ -0,0 +1,23 @@ +//Optical Fiber communication by A selvarajan
+//example 4.1
+//OS=Windows XP sp3
+//Scilab version 5.5.1
+clc;
+clear all;
+//given
+tau_r=12*10^-9//radiative recombination time in s
+tau_nr=35*10^-9//non-radiative recombination time in s
+n1=3.5//refractive index of semiconductor
+n2=1//refractive index of air
+d=0.4*10^-6//active later thickness in m
+V=8//recombination velocity
+eta_int=1/(1+(tau_r/tau_nr))//internal quantum efficiency
+tau=1/((tau_r^-1)+(tau_nr^-1)+(2*V/d))//total recombination time in s
+f=sqrt(3)/(2*%pi*tau)//bandwidth in Hz
+F3=((n1-n2)^2/(n1+n2)^2)//fresnel reflection
+eta_ext=eta_int*(1-F3)//external quantum efficiency
+mprintf("internal quantum efficiency=%f",eta_int)//The answers vary due to round off error
+mprintf("\ntotal recombination time =%f ns",tau*1e9)//multiplication by 1e9 to convert unit from s to ns//The answers vary due to round off error
+mprintf("\nbandwidth =%f MHz",f*1e-6)//multiplication by 1e-6 to convert unit from Hz to MHz///The answers vary due to round off error
+mprintf("\nfresnel reflection=%f ",F3)//The answers vary due to round off error
+mprintf("\nexternal quantum efficiency=%f",eta_ext)//The answers vary due to round off error
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