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Entry  Fri Nov 26 13:00:20 2010, Zach, Laser, GYRO, Gyro OLTFs and current noise spectrum oltfs_11_23_10.pnggnoise_11_23_10.png
    Reply  Fri Nov 26 19:43:34 2010, Koji, Laser, GYRO, Gyro OLTFs and current noise spectrum 
Message ID: 1177     Entry time: Fri Nov 26 13:00:20 2010     Reply to this: 1178
Author: Zach 
Type: Laser 
Category: GYRO 
Subject: Gyro OLTFs and current noise spectrum 

 Here is a plot of the CCW and CW loop OLTFs as measured on Wednesday afternoon. They both have a UGF around 12 kHz with a phase margin of 20 degrees for the CW loop and a lousy ~7 degrees for the CCW loop


Here is the current noise plot as measured in the AOM feedback signal. The level is about the same as before. The calibration is

500 kHz/V (VCO gain) x (c * 3.15 m) / (4 * 0.62 m2) ~ 0.67 (rad/s)/V


Now that I have current OLTF models I can continue with the list here

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