blob: cf87c17c1885b2ed7997ff02f227ef72914c278c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
// Example 6.3
// Calculation of the (a) the variance of the signal–ASE beat noise current, (b) the variance of the ASE–ASE beat noise current, and (c) the total variance.
// Page no 257
clc;
clear;
close;
//Given data
G=30; // Gain
nsp=5;
R=0.8;
f1=16*10^9;
fe=9*10^9;
//Pi1=-60;
c=3*10^8; // Velocity of light
h=6.63*10^-34 // Planck constant
lambda=1530*10^-9; // Wavelegth
Pi1=-27; // Input power
Pi2=-60;
f0=16*10^9;
//(a) The variance of the signal–ASE beat noise current for Pin=-27dBm
Po=G+Pi1;
Po=10^(Po/10);
Po=Po*10^-3;
G=10^(G/10);
f=c/lambda;
r=nsp*h*f*(G-1);
B=8*10^9;
//B=min(f/2,fe);
r0=4*R^2*Po*r*B;
//r0=r0*10^12;
//(b) The variance of the ASE–ASE beat noise current
r1=R^2*r^2*((2*f0)-fe)*fe;
//r1=r1*10^11;
// (c) The total variance.
rt=r0+r1;
// Displaying results in the command window
printf("\n (a) The variance of the signal–ASE beat noise current for Pin=-27dBm");
printf("\n The variance of the signal–ASE beat noise current = %0.2f x 10^-8 A^2",r0*10^8);
printf("\n The variance of the ASE–ASE beat noise current = %0.2f x 10^-11 A^2",r1*10^11);
printf("\n The total variance = %0.3f x 10^-8 A^2",rt*10^8);
// The answers vary due to round off error
//Given data
G=30; // Gain
nsp=5;
R=0.8; //
f1=16*10^9;
fe=9*10^9;
//Pi1=-60;
c=3*10^8; // Velocity of light
h=6.63*10^-34 // Planck constant
lambda=1530*10^-9; // Wavelegth
Pi1=-27; // Input power
Pi2=-60;
f0=16*10^9;
//(b) The variance of the signal–ASE beat noise current for Pin=-60dBm
Po2=G+Pi2;
Po=10^(Po2/10);
Po=Po*10^-3;
G=10^(G/10);
f=c/lambda;
r=nsp*h*f*(G-1);
B=8*10^9;
//B=min(f/2,fe);
r0=4*R^2*Po*r*B;
//r0=r0*10^12;
//(b) The variance of the ASE–ASE beat noise current
r1=R^2*r^2*((2*f0)-fe)*fe;
//r1=r1*10^11;
// (c) The total variance.
rt=r0+r1;
// Displaying results in the command window
printf("\n \n (b) The variance of the signal–ASE beat noise current for Pin=-60dBm");
printf("\n The variance of the signal–ASE beat noise current = %0.2f x 10^-11 A^2",r0*10^11);
printf("\n The variance of the ASE–ASE beat noise current = %0.2f x 10^-11 A^2",r1*10^11);
printf("\n The total variance = %0.2f x 10^-11 A^2 ",rt*10^11);
|
