All Questions
7
questions
1
vote
3
answers
781
views
Measuring coherence length with the Michelson Interferometer
In lab, I've been asked to measure the coherence length of a green-light laser source using a Michelson Interferometer. To do so, I configure the interferometer such that a circular fringe pattern ...
2
votes
1
answer
479
views
What is a 'good' coherence/correlation function for multimode spectra?
Following up on the question here and this answer in particular, I would like to pose the following question:
How to derive a formula for the coherence length of a multispectral source, such as a ...
- 181
8
votes
2
answers
578
views
Magically reappearing fringes in Michelson interferometer for large path length differences?
I've built a simple Michelson interferometer from two mirrors and a beam splitter according to the following schematic:
Image source
My setup differs from the one in the publication in that mirror M1 ...
- 181
1
vote
1
answer
2k
views
Calculating Coherence Length and spectral width given an interferogram
I'm currently doing a lab in which we use a Michelson-Morley interferometer to analyse different light source. One of the mirrors in the interferometer is moved by a stepper motor. One of the light ...
- 97
2
votes
4
answers
4k
views
What does it mean for a light to have low-coherence?
I've been searching about OCT imaging and understood that it is based on low-coherence light source. The problem is, I don't understand what is a low-coherence light source. Based on what points that ...
5
votes
3
answers
2k
views
Do stars produce spatially coherent light? Why?
If I understand correctly, the existance of astronomical interferometry implies coherence of light produces by stars. The temporal coherence can probably be achieved by wavelength filters. But what ...
- 695
1
vote
2
answers
281
views
Coherent length measurement of a monochromatic laser source
i need to learn about how to measure coherent length of a monochromatic laser source. I know that I can use michelson interferometer or spectrometry. For laser which has long coherent length michelson ...
- 11