Roll No- 24
Experiment No-8
AIM-Write a program in python to calculation numerical
aperture,acceptanceangle and critical angle.
PROGRAMME:
import math
n1 = float(input("Enter the refractive index of core n1="))
n2 = float(input("Enter the refractive index of core n2="))
if (n1<n2):
n1 = float(input("Enter the refractive index of core n1 is greater than n2="))
print("Re-entered value of n1 is",n1)
NA=math.sqrt(n1**2-n2**2)
AA=math.degrees(math.asin(NA))
CA=math.degrees(math.asin(n2/n1))
print("Numerical Aperture is",NA)
print("Acceptance angle is",AA)
print("critical Angle is",CA)
OUTPUT:
1) Enter the refractive index of core n1= 1.55
Enter the refractive index of core n2= 1.48
Numerical Aperture is 0.4605431575867786
Acceptance angle is 27.422162023442354
critical Angle is 72.71501741960225
2) Enter the refractive index of core n1= 1.23
Enter the refractive index of core n2= 1.32
Enter the refractive index of core n1 is greater than n2= 1.48
Re-entered value of n1 is 1.48
Numerical Aperture is 0.6693280212272602
Acceptance angle is 42.01522232489246
critical Angle is 63.11195238227597
Roll No- 24
Experiment No-9
AIM-Write a program in python to calculation signal attenuation and total
attenuation of the link(Example 3.1 from john senior)
PROGRAMME:
import math
Pi=float(input("Enter the input power of the fiber Pi="))
Po=float(input("Enter the output power of the fiber Po="))
L=float(input("Enter the length of the fiber L="))
A=Pi/Po
SA=10*(math.log(A,10))
print("Signal Attenuation is",SA)
SAL=SA/L
print("Signal Attenuation per km for the fiber is",SAL)
SPLICE=float(input("Enter the interval of SPLICE="))
SAS=float(input("Enter the signal attenuation per SPLICE="))
NL=float(input("Enter new length of the fiber="))
NSPLICE=(NL/SPLICE-1)
print("Total number os SPLICE in the new fiber= ",NSPLICE)
TSAS=NSPLICE*SAS
print("Total attenuation due to SPLICE=",TSAS)
SANL=NL*SAL
TFSA=SANL+TSAS
print("Total Attenuation of the link is=",TFSA)
power_ratio=10**(TFSA/10)
print("Numerical value for the input/output power ratio=",power_ratio)
OUTPUT:
Enter the input power of the fiber Pi= 120
Enter the output power of the fiber Po= 3
Enter the length of the fiber L= 8
Signal Attenuation is 16.02059991327962
Signal Attenuation per km for the fiber is 2.0025749891599527
Enter the interval of SPLICE= 1
Enter the signal attenuation per SPLICE= 1
Enter new length of the fiber= 10
Total number os SPLICE in the new fiber= 9.0
Total attenuation due to SPLICE= 9.0
Total Attenuation of the link is= 29.025749891599528
Numerical value for the input/output power ratio= 799.0519011866753
Roll No-24
Experiment No-10
AIM-Write a program in python to calculate LED Quantum efficiency and
power generated (Example 7.1 from John Senior)
PROGRAMME:
import math
RR=float(input("Enter the radiative recombination lifetimes of the minority
carriers="))
NRR=float(input("Enter the nonradiative recombination lifetimes of the
minority carriers="))
TR=RR*NRR/(RR+NRR)
print("Total carrier recombination lifetime is=",TR)
QE=TR/RR
print("The internal quantum efficiency of the device is=",QE)
W=float(input("Enter the peak emission wavelength="))
l=float(input("Enter drive current in mA="))
a=10
b=-34
c=-19
H=6.626*pow(a,b)
C=2.998*pow(10,8)
E=1.602*pow(a,c)
P=QE*H*C*l/(E*W)
print("The power generated is=",P)
OUTPUT:
Enter the radiative recombination lifetimes of the minority carriers= 60
Enter the nonradiative recombination lifetimes of the minority carriers= 100
Total carrier recombination lifetime is= 37.5
The internal quantum efficiency of the device is= 0.625
Enter the peak emission wavelength= 0.00000087
Enter drive current in mA= 40
The power generated is= 35.632090633834146
