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| Richardson Lab Experimental Log |
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Message ID: 134
Entry time: Tue Jun 27 14:04:42 2023
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| Author: |
Sophia A. |
| Type: |
Update |
| Category: |
Measuring Noise in Interferometer |
| Subject: |
Interferometer set up and connection to red pitaya |
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| Today we (Sophia and Tyler) constructed the set-up for the electrical noise calculation that I will be conducting this summer. I have included images of the setup below. Our system is effectively a green laser, that feeds into a type of polarizer, then into a beam splitter which sends the laser light down two arms into detectors. We started by connecting the detectors to an oscilloscope to determine whether the signal will exceed 1V, as the red pitaya (our planned data collection device) cannot receive signals with a higher voltage than 1V. We spent most of our time calibrating the oscilloscope and fine-tuning the set-up so that we would have approximately equal voltages in each arm of the interferometer. Once confirming that the output voltage would not meet or exceed 1V, we switched from an oscilloscope to the red pitaya for our measurements. Now that the system is set up, we will be able to run code in the red pitaya interface that will run an FFT on the signal, and then do noise analysis from there. |
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