Questions tagged [interferometry]
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Setup for fringe contrast measurement
I am currently reading the Fringe Contrast section of this document. This section says the following:
Be sure to use a DC-coupled detector when measuring fringe contrast. Adjust the interferometer alignment to maximize the fringe contrast in the…
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What are the ramifications of the existence of this "modulation rate" for the use of these lasers for interferometry?
I'm looking for a specific type of laser for interferometry experiments. There seem to be a lot of 1550nm fiber-coupled DFB laser diodes on websites like Alibaba. This seems to be because they are commonly used for optical communications purposes.…
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Why is it that the maximum fringe contrast is observed when the signal mean is half the amplitude?
I am currently reading the Fringe Contrast section of this document. This section says the following:
Why is it that the maximum fringe contrast is observed when the signal mean is half the amplitude? Based on the equation
$$I_\text{FC} =…
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How does using a high-pass filter and an amplifier maximize the signal amplitude for analog-to-digital conversion?
I am currently reading the Fringe Contrast section of this document. This section says the following:
Use a high-pass filter (HPF) and an amplifier (G) to maximize the signal amplitude for analog-to-digital conversion (ADC).
How does using a…
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