[Aritomi, Yuhang]
We recovered IR flash and alignment. However, when IR is aligned, IR reflection seems a bit cutted. We measured BAB reflectivity from filter cavity. Filter cavity was not locked with IR. IR injection is 343uW and reflection is 286uW. Reflectivity is 83% which is lower than before.
Current mode matching is as follows. Mode matching is 1706/(1706+343) = 83%. Pump green power is 60mW and green phase is scanned.
Mode | AOM frequency (MHz) | IR transmission |
TEM00 | 109.03549 | 1800 |
HG10 | 109.43087 | 200 |
HG01 | 109.43131 | 300 |
IG20 | 109.82841 | 125 |
offset | 94 |