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Entry  Mon Aug 16 14:19:00 2010, Alastair, Laser, GYRO, Changed to Marconi on AOM gyro_transmission_08_16_10.pdf
    Reply  Mon Aug 16 15:31:27 2010, Zach, Laser, GYRO, Changed to Marconi on AOM 
    Reply  Tue Aug 17 10:18:02 2010, rana, Laser, GYRO, Changed to Marconi on AOM 
       Reply  Tue Aug 17 15:34:02 2010, Alastair, Laser, GYRO, Changed to Marconi on AOM gyro_transmission_08_17_10.pdf
          Reply  Wed Aug 18 03:01:23 2010, rana, Laser, GYRO, Excess noise mystery resolved 
             Reply  Wed Aug 18 10:31:28 2010, Alastair, Laser, GYRO, Excess noise mystery resolved 
Message ID: 941     Entry time: Tue Aug 17 10:18:02 2010     In reply to: 936     Reply to this: 942
Author: rana 
Type: Laser 
Category: GYRO 
Subject: Changed to Marconi on AOM 

Its amazing if it turns out that the noise goes down that much with just turning off the feedback on the CW path. Is it really repeatable, or is it just that the CW beam was not resonating and therefore not producing a beat signal in the transmisssion?

We need to look at the noise of the PD, the PDH box, and the phase noise of the AOM drivers and then put them into the loop model and plot them with the noise budget. Do we have data on the open loop gain for the CCW and CW?

I also suggest that instead of using DTT, you make a mDV/NB hybrid that can plot each day's noise curve onto our latest SVN NB model. It would be handy.

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