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. |