In this week's group meeting, Andrew mentioned that the polarization axes of the AlGaAs mirrors are not properly aligned and there are two close by resonances at different polarizations. I indeed was seeing a small blip near resonance during a laser PZT scan. I fixed hte input polarization with the Half wave plate infront of South cavity at (56,26). I've attached two scan measurements from oscilloscopebefoer and after the optimization. The transmission increased by 10.1%.
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