All Questions
7
questions
0
votes
1
answer
180
views
What does quadrature mean in the context of sine waves and resonance?
I heard a professor talk about quadrature in a sine wave representing resonance in time. What is the quadrature of the wave, and what does it mean for a quadrature to shift?
To be more specific, a ...
1
vote
2
answers
95
views
What is 'optical phaseshift'?
In interferometry, it is said that lasers can be used to measure the 'optical phaseshift' of something. I am familiar with the concept of phase in the context of waves, but I don't understand exactly ...
- 889
3
votes
3
answers
5k
views
Michelson interferometer beam splitter phase shift
In a Michelson interferometer (image from Optics by E. Hecht ) .
To quote from the same book:
As the figure shows, the optical path difference for these rays is
nearly $2d \cos 0$. There is an ...
- 255
1
vote
0
answers
63
views
How to obtain the dispersive refractive index of a sample in a Michelson interferometer from the interferogram?
In the Michelson interferometer setup shown below, first I obtain the interferogram of the source (without sample). Then I put in the sample.
If the sample is not dispersive (its refractive index is ...
- 903
5
votes
1
answer
688
views
Non-resonant modes in cavity
I have a simple question. Suppose we have a laser with a cavity such that the frequency of the light that the laser emits does not match with any longitudinal modes allowed by the cavity.
In practice ...
2
votes
3
answers
4k
views
How to shift a laser wavelength?
Recently I have read something about the laser surface velocimeter, and after I have to rebuild from scratch (university project), I got a question: In the description they wrote that one of the laser ...
- 365
0
votes
1
answer
272
views
Source of beating phenomena of a Michelson interferometer?
I was discussing the reason why we see beating from a Michelson interferometer, and one of my friend said it 's because the light have different frequencies, therefore, they would be out of phase.
...
- 1,239