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Diffstat (limited to '3506/CH4/EX4.3/Ex_4_3.sce')
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1 files changed, 22 insertions, 0 deletions
diff --git a/3506/CH4/EX4.3/Ex_4_3.sce b/3506/CH4/EX4.3/Ex_4_3.sce new file mode 100644 index 000000000..2c9839240 --- /dev/null +++ b/3506/CH4/EX4.3/Ex_4_3.sce @@ -0,0 +1,22 @@ +//Optical Fiber communication by A selvarajan
+//example 4.3
+//OS=Windows XP sp3
+//Scilab version 5.5.1
+clc;
+clear all;
+//given
+clear all;
+Eg=1.3//band gap energy in eV
+l=0.4//cavity length in mm
+R1=0.5//reflectivities on ends
+R2=0.5//reflectivities on ends
+alpha=3//loss coefficient in /mm
+current_density=30*10^5//current density in amp/m^2
+area=0.2*0.5*10^-6//laser active area in m^2
+
+lambda=1.24/Eg//emission wavelength in um
+gth=alpha+(1/(2*l))*log(1/(R1*R2))// Threshold Gain
+threshold_current=current_density*area//threshold current in A
+mprintf("Emission wavelength =%f nm",lambda)//multiplication by 1e3 to convert unit from um to nm
+mprintf("\nThreshold Gain=%f/mm",gth)
+mprintf("\nThreshold current =%f mA",threshold_current*1e3)//for converting unit from A to mA
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