diff options
Diffstat (limited to '3822/CH5')
-rw-r--r-- | 3822/CH5/EX5.1/Ex5_1.jpg | bin | 0 -> 160031 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.1/Ex5_1.sce | 20 | ||||
-rw-r--r-- | 3822/CH5/EX5.2/Ex5_2.jpg | bin | 0 -> 160322 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.2/Ex5_2.sce | 21 | ||||
-rw-r--r-- | 3822/CH5/EX5.3/Ex5_3.jpg | bin | 0 -> 142941 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.3/Ex5_3.sce | 14 | ||||
-rw-r--r-- | 3822/CH5/EX5.4/Ex5_4.jpg | bin | 0 -> 160924 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.4/Ex5_4.sce | 18 | ||||
-rw-r--r-- | 3822/CH5/EX5.5.A/Ex5_5_A.jpg | bin | 0 -> 145407 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.5.A/Ex5_5_A.sce | 14 | ||||
-rw-r--r-- | 3822/CH5/EX5.5/Ex5_5.jpg | bin | 0 -> 145145 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.5/Ex5_5.sce | 14 | ||||
-rw-r--r-- | 3822/CH5/EX5.6/Ex5_6.jpg | bin | 0 -> 172820 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.6/Ex5_6.sce | 25 | ||||
-rw-r--r-- | 3822/CH5/EX5.7/Ex5_7.jpg | bin | 0 -> 162296 bytes | |||
-rw-r--r-- | 3822/CH5/EX5.7/Ex5_7.sce | 19 |
16 files changed, 145 insertions, 0 deletions
diff --git a/3822/CH5/EX5.1/Ex5_1.jpg b/3822/CH5/EX5.1/Ex5_1.jpg Binary files differnew file mode 100644 index 000000000..36c48b52f --- /dev/null +++ b/3822/CH5/EX5.1/Ex5_1.jpg diff --git a/3822/CH5/EX5.1/Ex5_1.sce b/3822/CH5/EX5.1/Ex5_1.sce new file mode 100644 index 000000000..d808eae32 --- /dev/null +++ b/3822/CH5/EX5.1/Ex5_1.sce @@ -0,0 +1,20 @@ + + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.1
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+Tc=727;//temperature in celcius
+lamda=0.5*10^-6;//wavength of emitting radiation in M
+h=6.626*10^-34;//Plank's constant in SI units
+KB=1.38*10^-23;//boltzman constant in SI units
+c=3*10^8;//speed of light in m/s
+f=c/lamda;//frequency in Hz
+T=Tc+273;//temperature in kelvin
+c1=(h*f)/(KB*T);//constant value
+B21byA21Pf=1/(exp(c1)-1);//ratio of stimulated and spontaneous emission rate
+mprintf("\n Ratio between stimulated and spontaneous emission is =%.1fx10^-13",B21byA21Pf*1e13); //multiplication by 1e13 to convert the ratio to 10^-13
diff --git a/3822/CH5/EX5.2/Ex5_2.jpg b/3822/CH5/EX5.2/Ex5_2.jpg Binary files differnew file mode 100644 index 000000000..5621edd77 --- /dev/null +++ b/3822/CH5/EX5.2/Ex5_2.jpg diff --git a/3822/CH5/EX5.2/Ex5_2.sce b/3822/CH5/EX5.2/Ex5_2.sce new file mode 100644 index 000000000..6dd24e9ce --- /dev/null +++ b/3822/CH5/EX5.2/Ex5_2.sce @@ -0,0 +1,21 @@ + + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.2
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+n=3.8;//refractive index
+L=200*10^-4;//length in cm
+W=100*10^-4;//width in cm
+Beta=20*10^-3;//gain factor in A/cm^3
+alpha=10;//loss coefficient per cm
+R1=((n-1)/(n+1))^2;//reflectivity
+c1=((alpha+((1/L)*(log(1/R1)))))//constant value
+Jth=(1/Beta)*c1;//threshold current density in A/cm^2
+mprintf("\n Threshold current density is= %.2f x10^3 A/cm^2",Jth*1e-3);//multiplication by 1e-3 to convert the ratio to 10^-3
+Ith=Jth*L*W;//threshold current in A
+mprintf("\n Threshold current is =%.2f mA",Ith*1e3);//the answer vary due to rouding
diff --git a/3822/CH5/EX5.3/Ex5_3.jpg b/3822/CH5/EX5.3/Ex5_3.jpg Binary files differnew file mode 100644 index 000000000..db85d1cb7 --- /dev/null +++ b/3822/CH5/EX5.3/Ex5_3.jpg diff --git a/3822/CH5/EX5.3/Ex5_3.sce b/3822/CH5/EX5.3/Ex5_3.sce new file mode 100644 index 000000000..e871b82a0 --- /dev/null +++ b/3822/CH5/EX5.3/Ex5_3.sce @@ -0,0 +1,14 @@ + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.3
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+Br=7.21*10^-10;//injected electron density
+Pn=10^18;//majority carrier hole density in/cm^3
+Gamar=1/(Br*Pn);//minority carrier life time
+mprintf("\n Minority carrier life time is =%.2f ns ",Gamar*1e9);// the answer vary due to roundingoff
+//multiplication by 1e9 to convert the unit to nm
diff --git a/3822/CH5/EX5.4/Ex5_4.jpg b/3822/CH5/EX5.4/Ex5_4.jpg Binary files differnew file mode 100644 index 000000000..f72dafd2f --- /dev/null +++ b/3822/CH5/EX5.4/Ex5_4.jpg diff --git a/3822/CH5/EX5.4/Ex5_4.sce b/3822/CH5/EX5.4/Ex5_4.sce new file mode 100644 index 000000000..679f6485a --- /dev/null +++ b/3822/CH5/EX5.4/Ex5_4.sce @@ -0,0 +1,18 @@ + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.5
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+lamda=0.85*1e-6;//wavelength of GaAs in m
+n1=3.6;//refractive index
+L=200e-6//length of the cavity in m
+K=L*(2*n1)/lamda;//number of modes
+mprintf("\n Number of modes=%.0f ",K);//the answer vary due to rounding//multiplication by 1e6 to convert the unit to um
+u=2*n1*L;//partial product
+v=(lamda)^2;//partial product
+dellamda=v/u;//separation wavelength between the two mode in m
+mprintf("\nThe separation wavelength between the two mode=%.2f nm",dellamda*1e9);//multiplication by 1e9 to convert the unit to nm// the answer given in textbook is wrong the unit is nm but the textbook gives it as um
diff --git a/3822/CH5/EX5.5.A/Ex5_5_A.jpg b/3822/CH5/EX5.5.A/Ex5_5_A.jpg Binary files differnew file mode 100644 index 000000000..abaaeddbe --- /dev/null +++ b/3822/CH5/EX5.5.A/Ex5_5_A.jpg diff --git a/3822/CH5/EX5.5.A/Ex5_5_A.sce b/3822/CH5/EX5.5.A/Ex5_5_A.sce new file mode 100644 index 000000000..61bd16e5b --- /dev/null +++ b/3822/CH5/EX5.5.A/Ex5_5_A.sce @@ -0,0 +1,14 @@ + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.5(A)
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+etaT=0.20//total efficiency
+Eg=1.43//bandgap energy in eV
+V=2.5//applied voltage in V
+etae=etaT*Eg*100/V//external power efficiency
+mprintf("\n External power efficiency =%.2f percent ",etae);
diff --git a/3822/CH5/EX5.5/Ex5_5.jpg b/3822/CH5/EX5.5/Ex5_5.jpg Binary files differnew file mode 100644 index 000000000..dd82085a9 --- /dev/null +++ b/3822/CH5/EX5.5/Ex5_5.jpg diff --git a/3822/CH5/EX5.5/Ex5_5.sce b/3822/CH5/EX5.5/Ex5_5.sce new file mode 100644 index 000000000..bc201eb1d --- /dev/null +++ b/3822/CH5/EX5.5/Ex5_5.sce @@ -0,0 +1,14 @@ + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.5
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+etaT=0.18//total efficiency
+Eg=1.43//bandgap energy in eV
+V=2.5//applied voltage in V
+etae=etaT*Eg*100/V//external power efficiency
+mprintf("\n External power efficiency =%.0f percent ",etae);
diff --git a/3822/CH5/EX5.6/Ex5_6.jpg b/3822/CH5/EX5.6/Ex5_6.jpg Binary files differnew file mode 100644 index 000000000..b0eb1c285 --- /dev/null +++ b/3822/CH5/EX5.6/Ex5_6.jpg diff --git a/3822/CH5/EX5.6/Ex5_6.sce b/3822/CH5/EX5.6/Ex5_6.sce new file mode 100644 index 000000000..023e2df79 --- /dev/null +++ b/3822/CH5/EX5.6/Ex5_6.sce @@ -0,0 +1,25 @@ + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.6
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+T1=273+20;//first temperature for an AlGaAs injection laser diode in kelvin
+T2=273+80;//second temperature for an AlGaAs injection laser diode in kelvin
+T01=160;//first thershold temperature in kelvin
+T02=55;//second thershold temperature in kelvin;
+
+//case 1:
+Jth120C=exp(T1/T01);
+Jth180C=exp(T2/T01);
+Jth1=Jth180C/Jth120C;
+mprintf("\n The ratio of threshold current densities for AlGaAs=%.2f",Jth1);//the answer vary due to rounding
+
+//case 2:
+Jth220C=exp(T1/T02);
+Jth280C=exp(T2/T02);
+Jth2=Jth280C/Jth220C;
+mprintf("\n The ratio threshold current densities for InGaAs=%.2f",Jth2);
diff --git a/3822/CH5/EX5.7/Ex5_7.jpg b/3822/CH5/EX5.7/Ex5_7.jpg Binary files differnew file mode 100644 index 000000000..c224f45c0 --- /dev/null +++ b/3822/CH5/EX5.7/Ex5_7.jpg diff --git a/3822/CH5/EX5.7/Ex5_7.sce b/3822/CH5/EX5.7/Ex5_7.sce new file mode 100644 index 000000000..f21c2d09c --- /dev/null +++ b/3822/CH5/EX5.7/Ex5_7.sce @@ -0,0 +1,19 @@ + +//OptoElectronics and Fibre Optics Communication, by C.K Sarkar and B.C Sarkar
+//Example 5.7
+//OS=Windows 10
+////Scilab version Scilab 6.0.0-beta-2(64 bit)
+clc;
+clear;
+
+//given
+lamda=0.85*1e-6;//wavelength of GaAs in m
+n1=3.6;//refractive index
+K=1700//number of modes
+L=K*lamda/(2*n1);//length of the cavity in m
+mprintf("\n Length of cavity in the laser=%.0f um",L*1e6);//the answer vary due to rounding//multiplication by 1e6 to convert the unit to um
+u=2*n1*L;//partial product
+v=(lamda)^2;//partial product
+dellamda=v/u;//separation wavelength between the two mode in m
+mprintf("\nThe separation wavelength between the two mode=%.2f nm",dellamda*1e9);//multiplication by 1e9 to convert the unit to nm// the answer given in textbook is wrong the unit is nm but the textbook gives it as um
+
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