Georgia, Terry, Sheila

Over the past couple of days we have set up the OSA at the AS port.  We had used this to tune differential CO2 powers to reduce the sideband imbalance before O2.   We set the OSA up behind the squeezer laser, and added and ROC= +150 lens to roughly collimate the beam. The OSA is a coherent 216G, we used a Thorlabs PDA100A to monitor the transmitted power.  The trigger channel and the output of the diode are plugged into a couple of extra ADC channels from the squeezer, H1:SQZ-EXTRA_AI_1 is the diode signal and EXTRA_AI_2 is the trigger.  

Attached is a plot of the scan taken part way through the power up to 15W (REF0) and about 1 minute after powering up to 15W.  We would like to look at this during a longer lock.