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Entry  Wed Aug 4 18:52:18 2010, Jenna, Laser, GYRO, AOM Feedback Signal AOM8-4.pdf
    Reply  Wed Aug 4 20:26:30 2010, rana, Laser, GYRO, AOM Feedback Signal 
       Reply  Wed Aug 4 20:34:48 2010, Alastair, Laser, GYRO, AOM Feedback Signal 
Message ID: 906     Entry time: Wed Aug 4 20:34:48 2010     In reply to: 904
Author: Alastair 
Type: Laser 
Category: GYRO 
Subject: AOM Feedback Signal 


That's great! Only a factor of 1 million to go!!

The Tektronix generator is a horrible, horrible, monster and it should not be used as a VCO if at all possible. What's the loop gain for the CW and CCW loops? We need measurements. Also need to see the error point spectra of these loops out to high frequency. By looking at the error spectrum before and after a small increase in gain, one can infer the UGF.

Also, the 40m has one spare PDA255 which can be used to measure the beat frequency in transmission. Its in a plastic tub next to the RF stuff. Luckily Zach is working on a resonant RFPD and we can have something real very soon.


 A million seems like a nice round number to start from.

We found one photodiode over here that we can use for the transmission readout.  I was putting it in.... then the stuff in that other elog post happened.

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