The pulse laser is converted by photo detector(PD) into electrical current. And we can see output voltage of photo detector by using oscilloscope.
Now we get voltage function detected by PD. Now I need to calculate energy of pulse. But I don't know how I do it.. Is there any formula I can use??
I run sympy.fourier_transform.
from sympy import fourier_transform, exp,symbols
from sympy.abc import x, k
a=fourier_transform(exp(-x**2), x, k)
s=symbols('s')
Ori=(s)*exp(-(x**2)/(s**2))
FT=fourier_transform(Ori,x,k)
a.subs({k:1}).evalf()...
Hello.
I'm studying Fourier analysis. If we look at attached graph where Gaussian functions are transformed by Fourier analysis, we can find Gaussian functions in frequency domain have maximum value at 0 hertz.
So I confused what is the Nyquist frequency at Gaussian signal. I need to know...
I want to write LaTeX. So I write e.g) '\left( \frac a b \right)' . But it looks just back space bar not mathematical equation. Does there need to install TeX program if I want to type LaTeX in Physics Forums???
Homework Statement
In Parseval's theorm, energy equals integral x(t) squre when x(t) represents voltage.
I wonder if x(t) represernts power, then does integral x(t) dt equal energy?? Because 'power multiplied time' means energy.
Homework Equations
The Attempt at a Solution
Homework Statement
By using fourier transform, I want to calculate power of signal. I confuse that f(x) in attached equation represents voltage or power. Is that possible when f(x) means power to use fourier transform.
Homework Equations
The Attempt at a Solution
Homework Statement
In parseval's theorm, what is type of x(t)?? I mean.. is this voltage wave? or power wave?
Homework Equations
The Attempt at a Solution
I will use 3 way power splitter and power detector.
1. This is power splitter data sheet. In this data sheet, there are different isolation values. What does it mean?? Also in that point, I wonder definition of isolation at power splitter.
2. This is power detector data sheet. In this data...
How can I use power detectors for RF pulse detection? RF pulse has a symmetric Gaussian-like shape.
Is the output of power detectors continuous line or point?