All Questions
Tagged with photonics interferometry
11
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Michelson interferometer but with 1 arm (Part 2)
I designed a setup similar to Michelson Interferometer but with one mirror only. So, there is an angle between the 2 rays to the detector:
In order to understand the result on screen, I used (Zemax/...
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Interferometer designed to create diffraction in free space
I designed the following interferometer:
If the light beam -theoretically- is very narrow , will light be diffracted away from point B from QED's perspective?
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Mode Interferometers (MMI) versus waveguide couplers
In Photonics Integrated Circuits Mach-Zender (MZ) modulators are very often used. This design splits one wageguide into two spatially separated waveguides and makes them to rejoin, in order to ...
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Mathematically, how exactly is $\langle \vert(E_m + E_r) \vert^2 \rangle$ calculated?
In a section on interferometry, my photonics textbook says the following:
Now, let's consider the signal obtained at the output of the interferometer. In general, the fields returned on the ...
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What is the difference between this "spectral width" and the laser linewidth (FWHM)?
I am currently looking at the 1550nm fibre-coupled DFB laser diodes on Alibaba for use in interferometry experiments. These are commonly used in optical communications applications, but it seems to me ...
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Why do two-beam interferometers have a relatively broad "fringe width" compared to single-beam interferometers?
I recently overheard someone discussing the basics of interferometry setups. They said that two-beam interferometers have a relatively broad "fringe width" compared to single-beam ...
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Is spatial coherence more important for interferometry, or is temporal coherence more important for interferometry?
I am currently going back through my textbook Laser Systems Engineering by Keith Kasunic. Chapter 1.2 Laser Engineering says the following:
One of the primary goals of laser engineering is to meet ...
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What photodetector parameters should I be focusing on, and in what priority, to maximise the performance of such an interferometer?
I'm trying to select a photodetector for an interferometry experiment. The interferometer will be trying to measure subtle vibrations occurring at a relatively high frequency (high kHz to low MHz). It ...
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3
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Do interferometers require polarizing beam splitters, or do they require non-polarizing beam splitters?
I want to build an interferometer. In order to do so, I need to buy some optical components, such as beam splitter cubes. These beam splitter cubes, and other optical components, come in a polarizing ...
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Interferometry: effect of aspheric lens on self-mixing effect
I want to perform self-mixing interferometry experiments using a laser diode, as was done here. I'm going to use a low-power laser diode. However, I want to improve the performance of the device, ...
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2
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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 ...
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