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Entry  Mon Mar 22 15:01:24 2010, Dmass, Laser, ISS, ISS Spectra ISSILandOL.pdfGreenPDsBudget.pngIRPDsBudget.pngPDSubtracAll.pdf
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    Reply  Thu Mar 25 02:06:53 2010, Dmass, Laser, ISS, ISS Spectra 
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             Reply  Thu Mar 25 14:16:32 2010, Dmass, Laser, ISS, MZ Spectra! rawdata.zipLockedPhaseNoise.pdf
Message ID: 705     Entry time: Thu Mar 25 02:06:53 2010     In reply to: 690     Reply to this: 706
Author: Dmass 
Type: Laser 
Category: ISS 
Subject: ISS Spectra 

Hartmut, Koji, and Matt came to party with me downstairs. I am tired so the plots and pix will follow at a later date...

We

  • Locked the PMC in analog with an SR560
  • Locked the Mach Zehnder with a PZT I had made up forever ago, using the spare output from the ISS drive box (with the IR PD difference signal)
  • Changed the ISS to supress noise in the MZ PD sum output

and

  • Saw a noise of 100 uV/rtHz at 10 Hz, which corresponds to ~20 urad/rtHz at 10 Hz. This is about a factor of 5 improvement over the previous result, with no subtraction yet.

Huzzah.

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