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Entry  Thu Apr 7 01:13:57 2011, Zach, Laser, GYRO, Houston, we have sidebands TEK00006.PNGTEK00008.PNG
    Reply  Thu Apr 7 14:07:54 2011, No Name, Laser, GYRO, Houston, we have sidebands polarized_081122_1405.png
Message ID: 1382     Entry time: Thu Apr 7 01:13:57 2011     Reply to this: 1383
Author: Zach 
Type: Laser 
Category: GYRO 
Subject: Houston, we have sidebands 

 The polarization going into the EOM was off by 90 degrees. This must have happened when I was minimizing the DC offset at some point (since there is a minimum whenever we are aligned with either of the crystal's axes, but of course the phase modulation is minimal here). I fixed it and we now have reasonable sidebands:


The carrier peak is at ~11 V, the sidebands are at ~176 mV. Using the 1st order bessel approximation, the modulation depth is

Γ = 2 sqrt(0.176/11) = 0.25 rads        this is about what we want.







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