We reran the SRCL dither arm power measurement for our new 35 W input power setting. This was taken two hours into a lock, so the IFO was relatively thermalized (QPD powers increased by ~0.1% after this measurement, see attachment two).
Results
Arm QPD Gain [DARM m/RIN] Arm Power Inferred [kW]
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XA 1.46e-6 173
XB 1.50e-6 178
YA 1.59e-6 188
YB 1.66e-6 196
X Arm Power = 175 kW
Y Arm Power = 192 kW
Mean Arm Power = 184 kW +- 9.0 kW
Ratio Y/X Arm Power = 1.095
Estimated Arm Power from Input Power and PRG
True input power = 31.2 W
PRG = 44.2
Theoretical Arm Gain = 280
Estimated Arm Power = 193.1 kW
So we have 184/193 = 95% of our total expected arm power.