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Entry  Tue Feb 9 22:43:29 2021, rana, Noise Hunting, Laser, "North" current driver having slow current fluctuations PXL_20210210_063043141.jpg
    Reply  Wed Feb 10 09:52:45 2021, shruti, Noise Hunting, Laser, "North" current driver having slow current fluctuations 
    Reply  Mon Feb 15 21:25:00 2021, rana, Noise Hunting, Laser, "North" current driver having slow current fluctuations Planex-Beatnote.pdfPlanex-Beatnote-ASD.pdfplotPhaseMeter.tar.gz
    Reply  Thu Feb 18 12:30:09 2021, aaron, Noise Hunting, Laser, "North" current driver having slow current fluctuations 
Message ID: 2645     Entry time: Mon Feb 15 21:25:00 2021     In reply to: 2636
Author: rana 
Type: Noise Hunting 
Category: Laser 
Subject: "North" current driver having slow current fluctuations 

before the current driver went bad, I took the beatnote time series. Its not bad!

I couldnt get the .mat file to load (although Shruti did...), so this is from the CSV file.

It looks better than the usual NPROs, and this is still on the noisy ITC 502 driver. We will need to measure the current noise of that driver and see how it lines up on this plot to figure out how low noise we really need for PSOMA.

And need to redo this measurement with longer duration once I fix one of our custom drivers.

 

Attachment 1: Planex-Beatnote.pdf  62 kB  | Hide | Hide all
Planex-Beatnote.pdf
Attachment 2: Planex-Beatnote-ASD.pdf  34 kB  | Hide | Hide all
Planex-Beatnote-ASD.pdf
Attachment 3: plotPhaseMeter.tar.gz  581 kB
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